- Minerals Arranged by X-Ray Powder Diffraction
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The Table of X-Ray diffraction in the Mineralogy Database is moving to a new, permanent domain. Please make sure to bookmark the new location at http://webmineral.com/X-Ray.shtml. |
Powder X-ray Diffraction (XRD) is one of the primary techniques used by mineralogists and solid state chemists to examine the physico-chemical make-up of unknown solids. This data is represented in a collection of single-phase X-ray powder diffraction patterns for the three most intense D values in the form of tables of interplanar spacings (D), relative intensities (I/Io), and mineral name.
The XRD technique takes a sample of the material and places a powdered sample in a holder, then the sample is illuminated with x-rays of a fixed wave-length and the intensity of the reflected radiation is recorded using a goniometer. This data is then analyzed for the reflection angle to calculate the inter-atomic spacing (D value in Angstrom units - 10-8 cm). The intensity(I) is measured to discriminate(using I ratios) the various D spacings and the results are compared to this table to identify possible matches.
For more information about this technique, see X-Ray Analysis of a Solid or take an internet course at Birkbeck College . Many thanks to Frederic Biret for these data.
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D1(Io) D2(I/Io) D3(I/Io) Mineral Name 0.7768(1) 0.7877(1) 3(1) Bowieite (Rh,Ir,Pt)1,77S3 0.779(1) 2.18(1) 0.8237(0.9) Sudburyite (Pd,Ni)Sb 0.7874(1) 0.8623(0.8) 0.8847(0.7) Rhodium (Rh,Pt) 1.019(1) 1.081(0.75) 1.887(0.63) Nowackiite Cu6Zn3As4S12 1.019(1) 1.757(1) 1.91(0.8) Kalininite ZnCr2S4 1.057(1) 1.483(1) 3.527(1) Ustarasite Pb(Bi,Sb)6S10 1.066(1) 2.05(1) 9.63(1) Freboldite CoSe 1.089(1) 1.846(1) 2.371(0.9) Ferdisilicite * FeSi2 1.12(1) 2.72(1) 5.44(1) Arsenolamprite As 1.142(1) 1.094(0.8) 2.18(0.8) Chengdeite Ir3Fe 1.156(1) 2(0.9) 1.003(0.7) Gupeiite Fe3Si 1.16(1) 2.02(1) 1.43(0.8) Chromferide Fe3Cr1-x (x=0,6) 1.163(1) 2.228(0.9) 1.932(0.7) Isoferroplatinum (Pt,Pd)3(Fe,Cu) 1.195(1) 2.24(1) 0.797(0.9) Tetraauricupride AuCu 1.196(1) 1.991(1) 1.817(0.9) Fersilicite * FeSi 1.202(1) 2.295(1) 1.408(0.9) Atokite (Pd,Pt)3Sn 1.202(1) 2.295(1) 1.408(0.9) Rustenburgite (Pt,Pd)3Sn 1.22(1) 2.13(1) 1.35(0.6) Osmium (Os,Ir) 1.299(1) 2.163(1) 1.529(0.8) Khamrabaevite (Ti,V,Fe)C 1.306(1) 4.62(1) 16(1) Perlialite K8Tl4Al12Si24O72·20(H2O) 1.31(1) 1.52(1) 2.49(1) Moissanite SiC 1.3346(1) 1.4221(0.25) 3.52(0.1) Baotite Ba4(Ti,Nb)8Si4O28Cl 1.375(1) 3.23(1) 3.55(1) Julienite * Na2Co++(SCN)4·8(H2O) 1.386(1) 2.75(1) 2.88(0.7) Olkhonskite (Cr+++,V+++)2Ti3O9 1.388(1) 4.27(1) 2.19(0.9) Jeremejevite Al6B5O15(F,OH)3 1.39(1) 2.41(1) 10.8(1) Glucine CaBe4(PO4)2(OH)4·0.5(H2O) 1.393(1) 1.418(1) 2.11(1) Akdalaite 4Al2O3·(H2O) 1.4(1) 1.49(1) 2.49(0.5) Leadamalgam HgPb2 1.43(1) 1.62(1) 2.99(1) Augite (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6 1.44(1) 2.14(1) 2.25(0.9) Mathiasite (K,Ca,Sr)(Ti,Cr,Fe,Mg)21O38 1.44(0.9) 2.84(0.9) 1.69(0.85) Romanite * (Fe2+,U,Pb)2(Ti,Fe3+)O12 1.45(1) 2.48(1) 2.043(0.9) Bityite CaLiAl2(AlBeSi2)O10(OH)2 1.486(1) 2.05(1) 2.15(1) Niggliite PtSn 1.487(1) 1.593(1) 2.9(0.9) Shuiskite Ca2(Mg,Al)(Cr,Al)2(SiO4)(Si2O7)(OH)2·(H2O) 1.494(1) 2.92(0.8) 8.3(0.6) Chrysocolla (Cu,Al)2H2Si2O5(OH)4·n(H2O) 1.495(1) 1.204(0.9) 2.83(0.7) Luanheite Ag3Hg 1.503(1) 2.572(1) 2.457(0.7) Preiswerkite NaMg2Al3Si2O10(OH)2 1.506(1) 2.485(1) 1.483(0.9) Mangan-neptunite KNa2Li(Mn,Fe++)2Ti2Si8O24 1.508(1) 3.02(1) 1.793(0.7) Calciotantite CaTa4O11 1.511(1) 2.6(0.9) 5.2(0.85) Takeuchiite (Mg,Mn++)2(Mn+++,Fe+++)BO5 1.516(1) 2.163(1) 3.19(1) Babefphite BaBe(PO4)(F,O) 1.519(1) 2.6(1) 4.52(0.8) Chromphyllite ! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 1.52(1) 4.56(1) 15.4(1) Nontronite Na0.3Fe+++2(Si,Al)4O10(OH)2·n(H2O) 1.53(1) 4.58(1) 15.8(0.8) Hectorite Na0,3(Mg,Li)3Si4O10(F,OH)2 1.539(1) 1.804(1) 2.94(1) Tazheranite (Zr,Ti,Ca)O2 1.54(1) 2.58(1) 2.88(0.6) Majorite Mg3(Fe,Al,Si)2(SiO4)3 1.54(1) 2.58(1) 2.88(0.6) Pyrope Mg3Al2(SiO4)3 1.54(1) 2.67(1) 15.4(1) Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) 1.54(1) 3.59(1) 4.36(1) Neotocite (Mn,Fe++)SiO3·(H2O) (?) 1.55(1) 2.522(1) 1.805(0.92) Sabelliite Cu2Zn(As,Sb)O4(OH)3 1.574(1) 2.62(1) 2.92(0.9) Calderite (Mn++,Ca)3(Fe+++,Al)2(SiO4)3 1.587(1) 1.84(1) 3.04(1) Cesstibtantite (Cs,Na)SbTa4O12 1.59(1) 1.8(1) 2.13(1) Lindsleyite (BaSr)(Ti,Cr,Fe,Mg,Zr)21O38 1.609(1) 3.159(1) 2.633(0.8) Cobaltaustinite CaCo(AsO4)(OH) 1.61(1) 2.52(1) 2.95(1) Maghemite gamma-Fe+++2O3 1.618(1) 1.873(1) 2.645(1) Zavaritskite BiOF 1.62(1) 2.14(1) 2.95(1) Bismutite Bi2(CO3)O2 1.62(1) 2.71(1) 3.03(0.8) Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0,2-1,5) 1.625(1) 2.14(1) 2.102(0.6) Pseudosinhalite ! Mg2Al3B2O9(OH) 1.629(1) 2.659(1) 5.3(1) Murdochite PbCu6O8-x(Cl,Br)2x 1.6332(1) 2.709(0.85) 2.423(0.65) Pyrite FeS2 1.635(1) 3.311(1) 7.4(1) Akaganeite Fe+++(O,OH,Cl) 1.635(1) 4(0.98) 2.33(0.69) Nsutite (g-MnO2)Mn++xMn++++1-xO2-2x(OH)2x (x is small) 1.64(1) 1.39(0.95) 2.84(0.85) Simpsonite Al4(Ta,Nb)3(O,OH,F)14 1.667(1) 2.539(0.9) 2.79(0.8) Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe+++)3O12 1.67(1) 2.67(0.97) 3.63(0.96) Eskolaite Cr2O3 1.674(1) 2.36(0.9) 2.85(0.9) Polydymite NiNi2S4 1.68(1) 1.83(0.6) 2.87(0.5) Fletcherite Cu(Ni,Co)2S4 1.68(1) 2.59(1) 2.77(0.8) Cobaltite CoAsS 1.683(1) 2.58(1) 2.82(0.9) Yafsoanite Ca3Te2Zn3O12 1.686(1) 2.481(0.8) 2.183(0.7) Pseudorutile Fe+++2Ti3O9 1.688(1) 1.511(0.6) 2.673(0.6) Schallerite (Mn++,Fe++)16Si12As+++3O36(OH)17 1.694(1) 3.258(0.8) 2.985(0.7) Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) 1.695(1) 3.25(0.8) 2.81(0.7) Laurite RuS2 1.707(1) 3.28(1) 2.52(0.9) Struverite (Ti,Ta,Fe+++)3O6 1.71(1) 3.729(0.9) 2.709(0.7) Natanite Fe++Sn++++(OH)6 1.713(1) 2.01(1) 2.69(0.9) Maucherite Ni11As8 1.717(1) 2.086(0.9) 3(0.5) Gagarinite-(Y) NaCaY(F,Cl)6 1.72(1) 2.456(1) 4.23(1) Hisingerite Fe+++2Si2O5(OH)4·2(H2O) 1.72(1) 3.26(0.9) 2.55(0.8) Ordonezite ZnSb2O6 1.74(1) 2.56(0.8) 3.33(0.8) Ferrotapiolite (Fe++,Mn++)(Ta,Nb)2O6 1.74(1) 2.56(0.8) 3.33(0.8) Tapiolite * (Fe,Mn)(Ta,Nb)2O6 1.74(1) 2.87(1) 3.31(1) Hollingworthite (Rh,Pt,Pd)AsS 1.74(1) 2.87(1) 3.32(1) Irarsite (Ir,Ru,Rh,Pt)AsS 1.74(1) 3.7(0.7) 5.02(0.7) Clinohumite (Mg,Fe++)9(SiO4)4(F,OH)2 1.743(1) 2.869(1) 2.651(0.7) Sonolite Mn9(SiO4)4(OH,F)2 1.744(0.9) 2.61(0.8) 3.3(0.7) Bezsmertnovite Au4Cu(Te,Pb) 1.746(1) 2.896(0.9) 3.345(0.8) Platarsite (Pt,Rh,Ru)AsS 1.75(1) 1.9(0.7) 2.98(0.6) Malanite Cu(Pt,Ir)2S4 1.75(1) 2.6(0.8) 3.33(0.8) Varlamoffite * (Sn,Fe)(O,OH)2 1.75(1) 2.85(1) 2.43(0.7) Gehlenite Ca2Al(AlSi)O7 1.755(1) 1.852(0.9) 1.549(0.8) Polkanovite ! Rh12As7 1.755(1) 2.48(1) 3(0.8) Trustedtite Ni3Se4 1.758(1) 3(1) 1.009(0.9) Cuprorhodsite CuRh2S4 1.76(1) 3(1) 2.489(0.9) Cuproiridsite CuIr2S4 1.761(1) 3.3(1) 4.77(0.5) Kassite CaTi2O4(OH)2 1.763(1) 2.98(1) 2.459(0.9) Konderite PbCu3(Rh,Pt,Ir)8S16 1.763(1) 3.008(1) 1.918(0.8) Cobaltpentlandite Co9S8 1.765(1) 2.85(0.8) 3.24(0.6) Roshchinite Ag19Pb10Sb51S96 or Pb(Ag,Cu)2(Sb,As)5S10 1.765(1) 3(0.8) 5.8(0.8) Xingzhongite (Pb,Cu,Fe)(Ir,Pt,Rh)2S4 1.766(1) 2.667(1) 3.099(1) Yftisite-(Y) (Y,Dy,Er)4(Ti,Sn)O(SiO4)2(F,OH)6 1.768(1) 3.01(1) 2.5(0.8) Florensovite Cu(Cr1,5Sb0,5)S4 1.769(1) 2.501(0.9) 2.886(0.7) Tyrrellite (Cu,Co,Ni)3Se4 1.77(1) 3.02(0.8) 2.51(0.6) Daubreelite Fe++Cr2S4 1.774(1) 2.24(0.9) 3.02(0.9) IMA97.029 Rh17S15 1.775(1) 3.03(0.8) 1.931(0.5) Pentlandite (Fe,Ni)9S8 1.776(1) 8.7(1) 3.07(0.9) Vozhminite (Ni,Co)4(As,Sb)S2 1.779(1) 2.89(0.9) 2.95(0.9) Weberite Na2MgAlF7 1.782(1) 2.332(0.8) 3.102(0.8) Welinite-III Mn++6(W++++++,Mg)2Si2(O,OH)14 1.782(1) 2.332(0.8) 3.102(0.8) Welinite-VIII Mn++6(W++++++,Mg)2SiO2(O,OH)14 1.7823(1) 3.393(0.89) 2.513(0.79) Manganhumite (Mn,Mg)7(SiO4)3(OH)2 1.796(1) 2.552(0.8) 2.873(0.8) Ribbeite (Mn++,Mg)5(SiO4)2(OH)2 1.797(1) 1.325(0.8) 2.222(0.8) Zoubekite AgPb4Sb4S10 1.798(1) 1.996(0.8) 3.443(0.2) Ertixiite Na2Si4O9 1.799(1) 2.86(0.8) 2.598(0.6) Alleghanyite Mn5(SiO4)2(OH)2 1.8(1) 2.02(1) 2.7(1) Wilkmanite Ni3Se4 1.801(1) 1.148(0.7) 2.98(0.6) Sperrylite PtAs2 1.801(1) 2.945(1) 1.537(0.9) Calzirtite CaZr3TiO9 1.804(1) 2.892(1) 3.707(0.6) Nordenskioldine CaSnB2O6 1.806(1) 2.557(1) 2.869(0.78) Jerrygibbsite Mn9(SiO4)4(OH)2 1.806(1) 2.877(0.9) 2.684(0.8) Leucophoenicite Mn7(SiO4)3(OH)2 1.81(1) 3.27(1) 3.16(0.9) Nasonite Pb6Ca4Si6O21Cl2 1.811(1) 2.644(1) 3.519(1) Chernovite-(Y) YAsO4 1.813(1) 1.146(0.9) 2.99(0.9) Tolovkite IrSbS 1.818(1) 3.12(0.8) 4.17(0.8) Tungusite Ca14(OH)8(Si8O20)3Fe++9(OH)14 1.819(1) 2.24(1) 3.17(1) Argentite * Ag2S 1.82(1) 3.445(0.89) 1.988(0.82) Rambergite MnS 1.828(1) 2.985(0.7) 2.372(0.6) Djerfisherite K6Na(Fe,Cu)24S26Cl 1.83(1) 2.81(1) 3.09(1) Plombierite Ca5H2Si6O18·6(H2O) (?) 1.83(1) 2.89(0.9) 1.66(0.8) Heazlewoodite Ni3S2 1.832(1) 2.93(0.9) 3.08(0.8) Betekhtinite Cu10(Fe,Pb)S6 1.834(1) 2.193(1) 3.261(0.9) Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13·10(H2O) 1.835(1) 2.378(0.9) 2.996(0.9) Owensite (Ba,Pb)6(Cu,Fe,Ni)25S27 1.839(1) 7.67(1) 2.34(0.9) Chlormagaluminite (Mg,Fe++)4Al2(OH)12(Cl2,CO3)·2(H2O) 1.842(1) 2.637(0.9) 2.569(0.8) Zirsinalite Na6(Ca,Mn,Fe++)ZrSi6O18 1.849(1) 3.09(0.8) 4.6(0.8) Caledonite Pb5Cu2(CO3)(SO4)3(OH)6 1.85(1) 2.63(0.8) 2.69(0.8) Glaucochroite CaMnSiO4 1.854(1) 2.827(1) 3.014(1) Saryarkite-(Y) Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7·6(H2O) 1.856(1) 2.8(1) 3.5(1) Plattnerite PbO2 1.858(1) 3.17(1) 2.018(0.4) Argentopentlandite Ag(Fe,Ni)8S8 1.86(1) 2.75(0.7) 2.51(0.6) Changchengite ! IrBiS 1.867(1) 1.593(0.99) 2.642(0.65) Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) 1.867(1) 3.445(1) 1.97(0.9) Calciborite CaB2O4 1.87(1) 3.04(1) 1.59(0.5) Arsenosulvanite Cu3(As,V)S4 1.871(1) 1.964(0.9) 2.387(0.9) Djurleite Cu31S16 1.874(1) 1.471(0.69) 2.365(0.69) Brizziite-III NaSb+++++O3 1.874(1) 1.471(0.69) 2.365(0.69) Brizziite-VII NaSb+++++O3 1.875(1) 2.93(0.8) 1.812(0.7) Luberoite Pt5Se4 1.875(1) 3.198(1) 2.041(0.81) Palladseite Pd17Se15 1.877(1) 1.959(0.9) 1.998(0.8) Novakite (Cu,Ag)21As10 1.88(1) 1.9746(0.7) 2.403(0.7) Chalcocite Cu2S 1.886(1) 2.67(1) 7.57(1) Borcarite Ca4MgB4O6(OH)6(CO3)2 1.89(1) 1.83(0.9) 2(0.9) Synchysite-(Y) (Y,Ce)Ca(CO3)2F 1.89(1) 3.28(0.9) 2.54(0.6) Eglestonite Hg6Cl3O(OH) (?) 1.892(1) 1.98(1) 3.08(1) Hypercinnabar HgS 1.892(1) 3.79(1) 1.87(0.8) Osarsite (Os,Ru)AsS 1.899(1) 3.061(0.55) 2.767(0.35) Yarrowite Cu9S8 1.9(1) 2.5(1) 2.6(1) Hastite CoSe2 1.902(1) 3.335(0.8) 2.903(0.75) Reinhardbraunsite Ca5(SiO4)2(OH,F)2 1.904(1) 3.11(0.8) 1.625(0.4) Chatkalite Cu6Fe++Sn2S8 1.91(1) 2.211(1) 4.52(1) Hongshiite PtCu (?) 1.91(1) 3.076(0.85) 2.777(0.3) Spionkopite Cu39S28 1.915(1) 2.63(1) 2.67(0.8) Omeiite (Os,Ru)As2 1.916(1) 2.31(1) 2.047(0.99) Ekaterinite Ca2B4O7(Cl,OH)2·2(H2O) 1.918(1) 1.977(1) 2.11(0.4) Orcelite Ni5As2 1.918(1) 2.174(1) 3.33(1) Genthelvite Zn4Be3(SiO4)3S 1.918(1) 2.71(0.5) 3.83(0.35) Neighborite NaMgF3 1.92(1) 1.095(0.9) 1.501(0.9) Anduoite (Ru,Os)As2 1.924(1) 1.977(1) 2.15(0.65) Perryite (Ni,Fe)8(Si,P)3 1.925(1) 3.145(0.9) 3.282(0.9) Geffroyite (Ag,Cu,Fe)9(Se,S)8 1.926(1) 1.469(0.9) 2.366(0.9) Satpaevite Al12V++++2V+++++6O37·30(H2O) 1.93(1) 1.132(0.9) 1.235(0.8) Gaotaiite Ir3Te8 1.93(1) 2.92(0.6) 8.12(0.6) Bultfonteinite Ca2SiO2(OH,F)4 1.93(1) 2.98(1) 3.27(1) Juanite Ca10Mg4Al2Si11O39·4(H2O) (?) 1.931(1) 3.153(0.94) 1.647(0.35) Fluorite CaF2 1.933(1) 2.375(0.9) 1.857(0.8) Roxbyite Cu9S5 1.937(1) 3.18(0.6) 2.74(0.5) Bornite Cu5FeS4 1.937(1) 3.21(1) 2.01(0.9) Huanghoite-(Ce) BaCe(CO3)2F 1.94(1) 1.72(0.6) 2.92(0.4) Geversite Pt(Sb,Bi)2 1.94(1) 4.086(0.51) 2.436(0.39) Stalderite TlCu(Zn,Fe,Hg)2As2S6 1.941(1) 2.747(0.95) 3.883(0.6) Cryolite Na3AlF6 1.942(1) 2.63(1) 2.53(0.8) IMA95.007 CoSbAs 1.945(1) 2.4(1) 3.02(1) Chvilevaite Na(Cu,Fe,Zn)2S2 1.948(1) 2.78(1) 3.43(0.75) Bastnasite-(Y) (Y,Ce)(CO3)F 1.952(1) 3.18(1) 1.671(0.5) Mgriite Cu3AsS3 1.955(1) 1.25(0.8) 1.735(0.8) Mayingite IrBiTe 1.956(1) 2.742(1) 2.688(0.8) Chrisstanleyite ! Ag2Pd3Se4 1.96(1) 2.21(0.8) 4.29(0.8) Cryolithionite Na3Li3Al2F12 1.96(1) 2.77(0.65) 3.2(0.57) Anilite Cu7S4 1.96(1) 3.19(0.95) 1.671(0.8) Eskebornite CuFeSe2 1.965(1) 3.058(1) 3.24(1) Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 1.973(1) 2.79(0.4) 3.21(0.4) Digenite Cu9S5 1.976(1) 1.297(0.6) 2.087(0.6) IMA95.032 (Fe,Os,Ru,Ir) 1.979(1) 2.103(1) 3.216(1) Zhonghuacerite-(Ce) ! Ba2Ce(CO3)3F 1.982(1) 2.917(0.9) 2.846(0.6) Larosite (Cu,Ag)21(Pb,Bi)2S13 1.988(1) 2.65(1) 2.19(0.7) Majakite PdNiAs 1.989(1) 2.11(0.4) 2.25(0.2) Algodonite Cu6As 1.99(1) 2.435(1) 1.42(0.6) Surinamite (Mg,Fe++)3Al4BeSi3O16 1.99(1) 2.7(0.8) 2.96(0.8) Insizwaite Pt(Bi,Sb)2 2(1) 1.92(0.8) 1.94(0.8) Xifengite Fe5Si3 2(1) 3.38(1) 3.4(1) Ardaite Pb19Sb13S35Cl7 2.001(1) 2.044(0.9) 2.089(0.8) Koutekite Cu5As2 2.003(1) 2.97(1) 1.778(0.8) Michenerite (Pd,Pt)BiTe 2.005(1) 1.16(0.3) 1.41(0.1) Suessite (Fe,Ni)3Si 2.01(1) 2.06(0.7) 2.38(0.65) Cohenite (Fe,Ni,Co)3C 2.01(1) 2.791(0.5) 2.508(0.4) Sheldrickite NaCa3(CO3)2F3·(H2O) 2.01(1) 2.98(0.75) 3.33(0.7) Aurostibite AuSb2 2.02(1) 2.81(0.7) 3.11(0.7) Korzhinskite CaB2O4·(H2O) 2.02(1) 3.32(0.9) 1.726(0.8) Berzelianite Cu2Se 2.023(1) 2.863(1) 3.53(0.5) Mummeite Ag3CuPbBi6S13 or Ag2Cu2Pb2Bi6S13 2.0268(1) 1.1702(0.3) 1.4332(0.2) Iron ! Fe 2.03(1) 1.967(0.6) 1.435(0.3) Kamacite alpha-(Fe,Ni) 2.03(1) 2.85(1) 3.54(0.8) Thorbastnasite Th(Ca,Ce)(CO3)2F2·3(H2O) 2.03(1) 2.86(0.7) 3.52(0.6) Vulcanite CuTe 2.034(1) 1.762(0.42) 1.246(0.21) Nickel Ni 2.039(1) 1.177(0.3) 0.912(0.2) Chromium Cr 2.04(1) 1.17(0.9) 0.77(0.8) Ferchromide Cr3Fe1-x(x=0,6) 2.04(1) 5.1(1) 10.1(0.6) Uranocircite Ba(UO2)2(PO4)2·12(H2O) 2.05(1) 1.347(0.8) 2.19(0.7) Jedwabite Fe7(Ta,Nb)3 2.05(1) 1.888(0.7) 1.965(0.5) Domeykite Cu3As 2.05(1) 2.17(0.5) 2.38(0.3) IMA96.039 (Cr,Fe)23C6 2.05(1) 3.09(1) 3.47(1) Sulfoborite Mg3B2(SO4)(OH)8(OH,F)2 2.056(1) 2.343(0.4) 2.142(0.35) Ruthenium (Ru,Ir,Os) 2.057(1) 2.635(0.9) 2.966(0.9) Pyrrhotite Fe(1-x)S (x=0-0.17) 2.058(1) 3.044(0.7) 2.72(0.5) Boracite Mg3B7O13Cl 2.06(1) 1.261(0.25) 1.0754(0.16) Diamond C 2.06(1) 1.72(0.75) 2.64(0.75) Heideite (Fe,Cr)1+x(Ti,Fe)2S4 2.06(1) 1.78(0.3) 1.26(0.2) Awaruite Ni2Fe to Ni3Fe 2.06(1) 2.19(1) 1.26(0.75) Lonsdaleite C 2.06(1) 3.38(0.8) 1.763(0.7) Bellidoite Cu2Se 2.06(1) 3.76(0.8) 2.329(0.6) Aerugite (_,Ni)9(AsO4)2(AsO6) (?) 2.061(1) 2.337(0.91) 2.189(0.61) Bromellite BeO 2.061(1) 2.696(0.7) 2.124(0.5) Ruthenarsenite (Ru,Ni)As 2.065(1) 3.003(0.9) 3.326(0.9) Itoite Pb3Ge(SO4)2O2(OH)2 2.07(1) 2.56(0.5) 2.82(0.4) Cuprostibite Cu2(Sb,Tl) 2.07(1) 3.19(1) 3.5(1) Banalsite BaNa2Al4Si4O16 2.07(1) 3.35(0.6) 2.55(0.4) Rickardite Cu7Te5 2.076(1) 2.858(0.7) 4.85(0.65) Shomiokite-(Y) Na3Y(CO3)3·3(H2O) 2.078(1) 2.259(1) 2.702(0.9) Kutinaite Cu14Ag6As7 2.0803(1) 1.3732(0.4) 2.1574(0.4) Danbaite CuZn2 2.085(1) 2.552(0.9) 1.601(0.8) Corundum Al2O3 2.088(1) 1.808(0.46) 1.278(0.2) Copper Cu 2.088(1) 2.41(0.91) 1.476(0.57) Bunsenite NiO 2.089(1) 1.201(0.8) 1.044(0.6) Zhanghengite (Cu,Zn,Fe,Al,Cr) 2.09(1) 2.01(0.7) 3.61(0.7) Weissite CuTe 2.09(1) 2.66(0.6) 1.72(0.5) Troilite FeS 2.09(1) 2.93(0.8) 2.98(0.8) Montbrayite (Au,Sb)2Te3 2.091(1) 2.473(0.53) 2.308(0.4) Zinc Zn 2.096(1) 2.606(0.8) 6.11(0.8) Edgarite FeNb3S6 2.105(1) 2.226(0.34) 2.388(0.32) Rhenium * Re 2.106(1) 1.489(0.52) 1.216(0.12) Periclase MgO 2.115(1) 2.355(0.8) 1.351(0.5) Stillwaterite Pd8As3 2.118(1) 3.456(1) 1.804(0.6) Cameronite AgCu7Te10 2.119(1) 2.314(1) 1.991(0.7) Oregonite Ni2FeAs2 2.12(1) 2.44(0.75) 1.496(0.55) Osbornite TiN 2.13(1) 2.34(0.6) 1.41(0.4) Arsenopalladinite Pd8(As,Sb)3 2.13(1) 7.61(1) 2.97(0.9) Uralborite CaB2O2(OH)4 2.131(1) 2.875(1) 3.39(1) Crichtonite (Sr,La,Ce,Y)(Ti,Fe+++,Mn)21O38 2.14(1) 1.62(0.9) 3.24(0.7) Sinhalite MgAlBO4 2.14(1) 2.21(0.9) 2.6(0.7) Palladoarsenide Pd2As 2.144(1) 1.081(0.8) 1.529(0.7) Hongquiite * TiO 2.146(1) 1.518(0.8) 2.476(0.7) Wustite FeO 2.15(1) 2.29(0.55) 2.36(0.4) Taimyrite (Pd,Cu,Pt)3Sn 2.151(1) 2.356(1) 1.863(0.8) Haxonite (FeNi)23C6 2.156(1) 3.043(0.8) 7.03(0.6) Henryite Cu4Ag3Te4 2.16(1) 2.55(0.8) 3.03(0.7) Stutzite Ag7Te4 2.16(1) 3.93(0.75) 2.78(0.63) Antarcticite CaCl2·6(H2O) 2.166(1) 3.387(1) 1.925(0.8) Stenonite (Sr,Ba,Na)2Al(CO3)F5 2.167(1) 2.356(0.9) 0.86(0.8) Isomertieite Pd11Sb2As2 2.172(1) 2.708(1) 2.648(0.9) Crawfordite Na3Sr(PO4)(CO3) 2.176(1) 2.544(0.9) 3.146(0.9) Ungarettiite NaNa2(Mn++2Mn+++3)Si8O22O2 2.179(1) 1.094(0.8) 1.163(0.8) Tulameenite Pt(Cu,Fe) 2.18(1) 2.23(1) 2.67(1) Kotoite Mg3B2O6 2.19(1) 1.972(0.7) 2.1(0.7) Schreibersite (Fe,Ni)3P 2.19(1) 2.09(0.8) 1.56(0.5) Cesarolite PbH2Mn++++3O8 2.19(1) 3.09(1) 1.374(0.8) Stistaite SnSb 2.191(1) 1.144(0.85) 1.897(0.75) Roaldite Fe4N 2.191(1) 1.92(0.7) 1.342(0.6) Tetraferroplatinum PtFe 2.191(1) 2.281(0.9) 1.23(0.6) Mertieite-II Pd8(Sb,As)3 2.192(1) 1.935(0.5) 1.324(0.4) Ferronickelplatinum Pt(Ni,Fe) 2.192(1) 3.027(1) 2.088(0.8) Stumpflite Pt(Sb,Bi) 2.194(1) 2.27(1) 1.577(0.5) Stibiopalladinite Pd5Sb2 2.196(1) 1.734(0.9) 7.84(0.9) Solongoite Ca2B3O4(OH)4Cl 2.2(1) 2.27(1) 1.58(0.7) Stannopalladinite (Pd,Cu)3Sn2 (?) 2.2(1) 3.78(0.7) 4.26(0.5) Tsnigriite Ag9SbTe3(S,Se)3 2.209(1) 2.746(1) 2.09(0.9) Hsianghualite Ca3Li2Be3(SiO4)3F2 2.21(1) 2.83(0.92) 2.25(0.87) Karlite (Mg,Al)6(BO3)3(OH,Cl)4 2.217(1) 1.9197(0.5) 1.1574(0.45) Iridium (Ir,Os,Ru) 2.218(1) 2.159(0.57) 3.087(0.38) Yuanjiangite AuSn 2.22(1) 1.986(0.4) 2.5(0.4) Palarstanide Pd8(Sn,As)3 2.22(1) 2.38(1) 1.24(0.8) Goldamalgam * (Au,Ag)Hg 2.22(1) 2.52(0.42) 2.98(0.25) Kolymite Cu7Hg6 2.22(1) 2.71(1) 2.29(0.8) Marokite CaMn+++2O4 2.22(1) 2.98(1) 5.74(0.9) Svanbergite SrAl3(PO4)(SO4)(OH)6 2.221(1) 2.227(1) 2.523(1) Belendorffite Cu7Hg6 2.222(1) 4.71(0.9) 4.35(0.7) Bayerite Al(OH)3 2.223(1) 1.571(0.6) 2.568(0.6) Manganosite MnO 2.23(1) 1.92(0.7) 1.94(0.7) Auricupride Cu3Au 2.23(1) 2.3(1) 1.207(0.6) Plumbopalladinite Pd3Pb2 2.232(1) 2.083(0.9) 2.485(0.9) Palladobismutharsenide Pd2(As,Bi) 2.233(1) 2.045(0.68) 1.923(0.42) Barringerite (Fe,Ni)2P 2.237(1) 1.306(0.5) 2.09(0.4) Telluropalladinite Pd9Te4 2.237(1) 2.067(0.8) 2.426(0.7) Rhodarsenide ! (Rh,Pd)2As 2.237(1) 6.73(0.7) 2.975(0.6) Parasibirskite Ca2B2O5·(H2O) 2.238(1) 2.97(0.9) 3.15(0.8) Jordanite Pb14(As,Sb)6S23 2.24(1) 1.331(0.3) 2.364(0.3) Titanium * Ti 2.241(1) 4.21(1) 1.726(0.75) Gatumbaite CaAl2(PO4)2(OH)2·(H2O) 2.243(1) 0.9396(0.9) 1.3593(0.8) Weishanite (Au,Ag)3Hg2 2.246(1) 1.945(0.42) 1.376(0.25) Palladium Pd or (Pd,Hg) 2.246(1) 3.072(1) 2.112(0.8) Laitakarite Bi4(Se,S)3 2.25(1) 1.299(0.8) 1.92(0.6) Damiaoite ! PtIn2 2.251(1) 3.093(0.4) 2.127(0.2) Poubaite PbBi2Se2(Te,S)2 2.252(1) 2.272(1) 1.737(0.95) Chondrodite (Mg,Fe++)5(SiO4)2(F,OH)2 2.256(1) 1.479(0.7) 2.438(0.7) Humite (Mg,Fe++)7(SiO4)3(F,OH)2 2.26(1) 2.16(0.9) 0.791(0.4) Keithconnite Pd20Te7 2.26(1) 3.07(1) 2.11(0.9) Sobolevskite PdBi 2.265(1) 1.962(0.53) 1.1826(0.33) Platinum Pt 2.265(1) 3.02(0.9) 1.934(0.6) Genkinite (Pt,Pd)4Sb3 2.267(1) 1.263(0.6) 2.404(0.6) Paraschachnerite Ag3Hg2 2.273(1) 0.8595(0.6) 2.42(0.5) Schachnerite Ag1,1Hg0,9 2.279(1) 2.171(0.9) 2.232(0.65) Mertieite-I Pd11(Sb,As)4 2.28(1) 2.16(0.7) 1.955(0.5) Paolovite Pd2Sn 2.281(1) 3.325(0.8) 1.795(0.78) Malladrite Na2SiF6 2.283(1) 2.163(0.4) 1.369(0.3) IMA95.049 (Pt,Pd,Cu)9Cu3Sn4 2.29(1) 1.37(0.4) 2.42(0.4) Dyscrasite Ag3Sb 2.29(1) 2.17(0.9) 1.23(0.8) Cabriite Pd2SnCu 2.29(1) 8(1) 13.7(1) Connellite Cu19Cl4(SO4)(OH)32·3(H2O) 2.292(1) 3.1(1) 2.111(0.75) Tetradymite Bi2Te2S 2.292(1) 3.314(1) 5.507(1) Diaboleite Pb2CuCl2(OH)4 2.3(1) 1.203(0.8) 1.99(0.6) Yixunite ! Pt3In 2.3(1) 1.728(0.9) 2.8(0.8) Amakinite (Fe++,Mg)(OH)2 2.3(1) 2.23(0.8) 1.193(0.7) Tongbaite Cr3C2 2.3(1) 2.4(1) 2.7(1) Bornhardtite Co++Co+++2Se4 2.3(1) 3.34(1) 3.56(0.8) Alamosite PbSiO3 2.305(1) 2.707(0.8) 2.602(0.7) Franklinfurnaceite Ca2(Fe+++Al)Mn+++Mn++3Zn2Si2O10(OH)8 2.308(1) 4.61(0.8) 1.746(0.6) Muskoxite Mg7Fe+++4O13·10(H2O) 2.31(1) 2.87(0.8) 2.25(0.7) Hessite Ag2Te 2.315(1) 1.207(0.9) 2.011(0.8) Zvyagintsevite (Pd,Pt,Au)3(Pb,Sn) 2.315(1) 3.43(0.7) 2.81(0.4) Averievite ! Cu5(VO4)2O2·CuCl2 2.315(1) 3.52(0.9) 4.7(0.9) Cookeite LiAl4(Si3Al)O10(OH)8 2.319(1) 1.639(0.6) 1.338(0.17) Villiaumite NaF 2.325(1) 2.63(1) 2.88(1) Makinenite NiSe 2.331(1) 2.55(0.4) 2.79(0.3) Cadmium Cd 2.331(1) 2.844(0.9) 3.105(0.9) Franciscanite-III Mn++6V+++++2Si2(O,OH)14 2.331(1) 2.844(0.9) 3.105(0.9) Franciscanite-VIII Mn++6(V+++++,?)2Si2(O,OH)7 2.335(1) 4.61(0.95) 1.755(0.5) Theophrastite Ni(OH)2 2.34(1) 1.274(0.8) 1.402(0.55) Potarite PdHg 2.34(1) 4.01(1) 3.64(0.9) Beryllite Be3SiO4(OH)2·(H2O) 2.34(1) 4.16(1) 3.19(0.8) Widenmannite Pb2(UO2)(CO3)3 2.345(1) 2.74(0.9) 2.794(0.9) Jalpaite Ag3CuS2 2.354(1) 2.674(0.9) 7.03(0.85) Tuliokite BaNa6Th(CO3)6·6(H2O) 2.355(1) 2.039(0.52) 1.23(0.36) Gold Au 2.359(1) 2.044(0.4) 1.231(0.26) Silver Ag 2.36(1) 1.224(0.9) 2.04(0.7) Aluminum Al 2.36(1) 1.23(0.8) 2.045(0.6) Bogdanovite (Au,Te,Pb)3(Cu,Fe) 2.36(1) 1.365(0.7) 1.236(0.6) Moschellandsbergite Ag2Hg3 2.365(1) 4.77(0.9) 1.794(0.55) Brucite Mg(OH)2 2.37(1) 0.95(0.8) 2.1(0.8) Eugenite Ag9Hg2 2.37(1) 1.232(0.8) 2.05(0.7) Bilibinskite Au3Cu2PbTe2 2.37(1) 2.252(0.6) 2.548(0.4) Allargentum Ag1-xSbx(x=0.009-0.16) 2.37(1) 2.93(0.6) 2.14(0.5) Hibbingite (Fe,Mg)2(OH)3Cl 2.372(1) 4.83(0.9) 2.657(0.8) Cumengeite Pb21Cu20Cl42(OH)40 2.373(1) 6.46(0.76) 2.845(0.55) Drysdallite Mo(Se,S)2 2.379(1) 2.572(0.8) 2.597(0.55) Safflorite (Co,Fe)As2 2.38(1) 2.74(0.8) 2.6(0.6) Poyarkovite Hg3ClO 2.38(1) 3.93(0.9) 3.8(0.8) Behoite Be(OH)2 2.384(1) 2.808(0.8) 3.176(0.8) Karibibite Fe+++2As+++4(O,OH)9 2.386(1) 5.7(0.8) 5.36(0.7) Kempite Mn2Cl(OH)3 2.389(1) 2.1(0.8) 3.638(0.8) Vasilite (Pd,Cu)16(S,Te)7 2.39(1) 2.15(0.6) 3.11(0.6) Vernadite (gamma-MnO2),(Mn++++,Fe+++,Ca,Na)(O,OH)2·n(H2O) 2.39(1) 2.62(1) 1.765(0.9) Trogtalite CoSe2 2.39(1) 2.763(1) 3.739(0.8) Buckhornite AuPb2BiTe2S3 2.391(1) 2.81(0.3) 1.196(0.26) Hunchunite (Au,Ag)2Pb 2.393(1) 3.078(1) 3.8(0.9) Rohaite Tl2Cu8,5Sb2S4 2.399(1) 1.654(0.8) 3.11(0.8) Cryptomelane K(Mn++++,Mn++)8O16 2.405(1) 1.701(0.45) 2.778(0.34) Lime CaO 2.406(1) 7.017(0.98) 3.136(0.92) Manjiroite (Na,K)(Mn++++,Mn++)8O16·n(H2O) 2.408(1) 1.419(0.8) 2.052(0.7) Musgravite (Mg,Fe++,Zn)2Al6BeO12 2.41(1) 1.537(0.6) 2.3(0.5) Maldonite Au2Bi 2.41(1) 2.19(0.85) 3.48(0.6) Romanechite (Ba,H2O)2(Mn++++,Mn+++)5O10 2.41(1) 4.47(1) 3.132(0.3) Reichenbachite Cu++5(PO4)2(OH)4 2.42(1) 1.425(0.8) 2.6(0.8) Zincohogbomite ! Zn(2-2x)(Ti)xAl4O8 2.42(1) 2.1(0.5) 3.05(0.4) Telargpalite (Pd,Ag)3Te 2.42(1) 2.71(1) 2.85(0.8) Crednerite CuMnO2 2.42(1) 2.85(0.9) 1.55(0.6) Nigerite-6H (Zn,Mg,Fe++)(Sn,Zn)2(Al,Fe+++)12O22(OH)2 2.422(1) 2.856(0.8) 1.426(0.5) Pehrmanite (Fe++,Zn,Mg)2Al6BeO12 2.423(1) 2.246(0.9) 1.371(0.8) Atheneite (Pd,Hg)3As 2.423(1) 2.846(0.9) 1.414(0.5) Pengzhizhongite-24R (Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2Al10O22(OH)2 2.423(1) 2.846(0.9) 1.414(0.5) Pengzhizhongite-6H (Mg,Zn,Fe+++,Al)4(Sn,Fe+++)2Al10O22(OH)2 2.43(1) 1.428(0.8) 2.05(0.8) Taaffeite Mg3Al8BeO16 2.43(1) 2.88(0.5) 1.48(0.4) Aguilarite Ag4SeS 2.43(1) 3.24(1) 8.27(1) Calclacite Ca[Cl2/CH3COO]·10(H2O) 2.43(1) 3.469(0.9) 2.744(0.85) Liebenbergite (Ni,Mg)2SiO4 2.435(1) 1.869(0.9) 5.71(0.8) Dayingite * CuCoPtS4 2.436(1) 2.021(0.7) 1.429(0.6) Spinel MgAl2O4 2.438(1) 2.861(0.84) 1.429(0.43) Gahnite ZnAl2O4 2.438(1) 3.722(0.9) 3.475(0.5) Holtedahlite Mg12(PO3OH,CO3)(PO4)5(OH,O)6 2.44(1) 1.434(0.6) 2.87(0.6) Hogbomite-15R-18R-24R (Mg,Fe++)2(Al,Ti)5O10 2.44(1) 4.3(1) 11.5(1) Ilmajokite (Na,Ce,Ba)2TiSi3O5(OH)10·n(H2O) 2.445(1) 4.82(1) 9.6(1) Asbolane (Co,Ni)1-y(Mn++++O2)2-x(OH)2-2y+2x·n(H2O) 2.447(1) 1.434(0.58) 2.028(0.58) Ringwoodite (Mg,Fe++)2SiO4 2.448(1) 2.952(1) 4.37(0.7) Purpurite Mn+++PO4 2.45(1) 1.97(0.6) 2.25(0.6) Ferrihydrite 5Fe+++2O3·9(H2O) 2.45(1) 2.04(0.7) 1.44(0.6) Wadsleyite (Mg,Fe++)2SiO4 2.45(1) 2.68(1) 1.806(0.9) Penroseite (Ni,Co,Cu)Se2 2.45(1) 2.97(0.9) 4.9(0.9) Adamite Zn2(AsO4)(OH) 2.45(1) 4.72(0.9) 1.826(0.6) Pyrochroite Mn(OH)2 2.452(1) 4.31(0.9) 3.46(0.85) Heterosite Fe+++PO4 2.458(1) 2.512(0.7) 3.883(0.7) Forsterite Mg2SiO4 2.4597(1) 1.4414(0.42) 1.5691(0.36) Hercynite Fe++Al2O4 2.46(1) 2.62(1) 2.95(1) Gaudefroyite Ca4Mn+++3-x(BO3)3(CO3)(O,OH)3 2.462(1) 2.707(0.9) 3.04(0.8) Hetaerolite ZnMn+++2O4 2.465(1) 2.135(0.37) 1.51(0.27) Cuprite Cu2O 2.47(1) 1.646(0.45) 2.85(0.4) Mcconnellite CuCrO2 2.47(1) 2.66(0.8) 3.02(0.7) Hydrohetaerolite Zn2Mn+++4O8·(H2O) 2.472(1) 2.26(0.9) 2.022(0.6) Oulankaite (Pd,Pt)5(Cu,Fe)4SnTe2S2 2.473(1) 2.84(0.8) 3.52(0.7) Satterlyite (Fe++,Mg,Fe+++)2(PO4)(OH) 2.476(1) 2.816(0.71) 2.602(0.56) Zincite (Zn,Mn)O 2.48(1) 2.69(1) 8(0.8) Northupite Na3Mg(CO3)2Cl 2.48(1) 4.02(1) 2.76(0.9) Chkalovite Na2BeSi2O6 2.489(1) 2.562(1) 4.72(1) Cornubite Cu5(AsO4)2(OH)4 2.49(1) 1.466(0.7) 1.593(0.6) Magnesiochromite MgCr2O4 2.49(1) 2.77(0.9) 1.544(0.8) Hausmannite Mn++Mn+++2O4 2.49(1) 3.336(1) 4.8(0.8) Parakhinite Cu++3PbTe++++++O6(OH)2 2.491(1) 3.451(0.9) 4.866(0.8) Khinite PbCu++3Te++++++O6(OH)2 2.492(1) 2.921(0.6) 1.46(0.45) Galaxite (Mn,Fe++,Mg)(Al,Fe+++)2O4 2.494(1) 2.628(0.59) 2.89(0.5) Eucairite CuAgSe 2.5(1) 2.07(0.8) 2.93(0.6) Coulsonite Fe++V+++2O4 2.5(1) 2.95(0.9) 2.55(0.7) Furutobeite (Cu,Ag)6PbS4 2.501(1) 2.655(0.9) 2.893(0.8) Krinovite NaMg2CrSi3O10 2.501(1) 4.52(0.85) 14.2(0.8) Sudoite Mg2(Al,Fe+++)3Si3AlO10(OH)8 2.505(1) 2.648(0.8) 2.812(0.6) Hibonite (Ca,Ce)(Al,Ti,Mg)12O19 2.508(1) 1.512(0.4) 2.86(0.35) Delafossite Cu+Fe+++O2 2.51(1) 2.65(0.9) 2.57(0.8) Pirssonite Na2Ca(CO3)2·2(H2O) 2.51(1) 2.95(0.55) 1.472(0.5) Nichromite (Ni,Co,Fe++)(Cr,Fe+++,Al)2O4 2.51(1) 3.26(1) 2.81(0.6) Terlinguaite Hg+Hg++ClO 2.51(1) 6(0.55) 2.59(0.45) Rinneite K3NaFe++Cl6 2.512(1) 1.4721(0.45) 2.947(0.35) Cochromite (Co,Ni,Fe++)(Cr,Al)2O4 2.513(1) 1.476(0.4) 1.605(0.3) Trevorite NiFe+++2O4 2.513(1) 3.421(0.7) 5.92(0.6) Weinebeneite CaBe3(PO4)2(OH)2·5(H2O) 2.514(1) 2.548(1) 5.1(0.5) Bonaccordite Ni2Fe+++BO5 2.517(1) 1.479(0.6) 2.96(0.5) Cuprospinel (Cu,Mg)Fe+++2O4 2.519(1) 2.954(0.5) 1.476(0.35) Zincochromite ZnCr2O4 2.52(1) 1.46(0.9) 1.6(0.9) Chromite Fe++Cr2O4 2.52(1) 1.582(0.9) 4.84(0.9) Magnesiocoulsonite MgV++++2O4 2.52(1) 2.32(0.96) 2.53(0.49) Tenorite CuO 2.52(1) 2.67(1) 2.98(1) Hydrohalite NaCl·2(H2O) 2.52(1) 2.96(1) 2.87(0.8) Natalyite Na(V+++,Cr+3)Si2O6 2.52(1) 3.04(1) 4.36(1) Zemkorite (Na,K)2Ca(CO3)2 2.52(1) 3.1(1) 2.83(0.9) Homilite Ca2(Fe++,Mg)B2Si2O10 2.52(1) 3.47(0.9) 2.78(0.8) Laihunite Fe++Fe+++2(SiO4)2 2.52(1) 5.76(1) 3.7(0.8) Painite CaZrBAl9O18 2.521(1) 3.9(0.85) 2.678(0.5) Brochantite Cu4(SO4)(OH)6 2.522(1) 4.39(0.9) 3.203(0.8) Paragonite NaAl2(Si3Al)O10(OH)2 2.525(1) 2.96(0.4) 1.481(0.35) Magnesioferrite MgFe+++2O4 2.5293(1) 8.048(0.9) 2.0979(0.63) Hogtuvaite (Ca,Na)2(Fe++,Fe+++,Ti,Mg,Mn)6(Si,Be,Al)6O20 2.53(1) 1.483(0.85) 1.614(0.85) Magnetite Fe++Fe+++2O4 2.53(1) 1.486(0.6) 1.617(0.5) Qandilite (Mg,Fe++)2(Ti,Fe+++,Al)O4 2.53(1) 2.56(0.8) 2.9(0.8) Serendibite Ca2(Mg,Al)6(Si,Al,B)6O20 2.53(1) 2.75(0.8) 3.46(0.8) Xanthiosite Ni3(AsO4)2 2.53(1) 2.81(0.7) 4.86(0.6) Kuznetsovite Hg3Cl(AsO4) 2.53(1) 2.91(1) 3.73(0.8) Thalcusite TlCu3FeS4 2.53(1) 2.91(0.7) 7.324(0.7) Welshite Ca2Sb+++++Mg4Fe+++Si4Be2O20 2.53(1) 3.16(1) 3.3(1) Odintsovite K2Na4Ca3Ti2Be4Si12O38 2.53(1) 3.55(1) 7.12(1) Berthierine (Fe++,Fe+++,Mg)2-3(Si,Al)2O5(OH)4 2.53(1) 7.29(1) 3.61(0.8) Antigorite (Mg,Fe++)3Si2O5(OH)4 2.531(1) 2.422(0.8) 2.427(0.8) Clinosafflorite (Co,Fe,Ni)As2 2.5313(1) 2.8915(0.7) 4.139(0.5) Abhurite Sn3O(OH)2Cl2 2.532(1) 2.774(0.8) 4.39(0.8) Reederite-(Y) Na15Y2(CO3)9(SO3F)Cl 2.533(1) 1.462(0.35) 2.72(0.35) Macaulayite (Fe+++,Al)24Si4O43(OH)2 2.535(1) 3.502(0.85) 7(0.85) Kellyite (Mn++,Mg,Al)3(Si,Al)2O5(OH)4 2.536(1) 2.714(0.87) 3.361(0.71) Fangite Tl3AsS4 2.54(1) 1.47(0.8) 2.23(0.5) Feroxyhyte Fe+++O(OH) 2.54(1) 1.484(0.9) 1.615(0.7) Brunogeierite (Ge++,Fe++)Fe+++2O4 2.54(1) 1.8(0.63) 5.9(0.63) Lawrencite (Fe++,Ni)Cl2 2.54(1) 2.65(0.85) 3.89(0.48) Radtkeite Hg3S2ClI 2.54(1) 2.816(1) 3.528(1) Junitoite CaZn2Si2O7·(H2O) 2.54(1) 3.51(0.9) 4.29(0.9) Triphylite LiFe++PO4 2.54(1) 4.67(0.9) 5.21(0.8) Nastrophite Na(Sr,Ba)(PO4)·9(H2O) 2.545(1) 2.325(0.9) 1.716(0.8) Gersdorffite NiAsS 2.545(1) 2.64(1) 2.935(0.8) Kullerudite NiSe2 2.547(1) 1.486(0.9) 4.456(0.9) Saliotite Na0,5Li0,5Al3AlSi3O10(OH)5 2.547(1) 5.09(0.7) 5.75(0.7) Donharrisite Ni8Hg3S9 2.548(1) 3.051(0.9) 3.516(0.5) Lithiophilite LiMnPO4 2.549(1) 5.09(0.9) 5.89(0.9) Dumortierite Al6.5-7(BO3)(SiO4)3(O,OH)3 2.55(1) 1.499(0.8) 2.99(0.7) Franklinite (Zn,Mn++,Fe++)(Fe+++,Mn+++)2O4 2.55(1) 1.63(0.7) 1.5(0.6) Manganochromite (Mn,Fe++)(Cr,V)2O4 2.55(1) 2.61(1) 4.52(1) Beidellite (Na,Ca0,5)0,3Al2(Si,Al)4O10(OH)2·n(H2O) 2.55(1) 2.69(0.8) 5.9(0.5) Chlormanganokalite K4MnCl6 2.55(1) 2.74(0.9) 2.8(0.8) Langbanite (Mn,Ca,Fe,Mg)++4(Mn,Fe)9Sb+++++[O16(SiO4)2] 2.55(1) 2.98(1) 1.955(0.9) Balkanite Cu9Ag5HgS8 2.55(1) 3.08(1) 3.48(0.9) Prehnite Ca2Al2Si3O10(OH)2 2.55(1) 3.39(0.46) 4.86(0.37) Schwertmannite Fe+++16O16(OH)12(SO4)2 2.55(1) 3.89(1) 2.81(0.8) Fiedlerite Pb3Cl4F(OH)2 2.55(1) 4.16(1) 12.3(1) Stilpnomelane K(Fe++,Mg,Fe+++,Al)8(Si,Al)12(O,OH)27·2(H2O) 2.551(1) 3.43(0.8) 3.95(0.7) Olenite NaAl3Al6(BO3)3(Si6O18)(O,OH)4 2.552(1) 1.677(0.6) 1.723(0.5) Nelenite (Mn,Fe++)16Si12As+++3O36(OH)17 2.552(1) 2.476(0.9) 2.843(0.65) Rammelsbergite NiAs2 2.555(1) 2.035(0.8) 5.813(0.8) Paracostibite CoSbS 2.556(1) 2.01(0.6) 2.823(0.5) Suanite Mg2B2O5 2.557(1) 3.175(0.9) 3.414(0.9) Lotharmeyerite CaZnMn+++(As+++++O3OH)2(OH)3 2.557(1) 6.81(0.45) 2.267(0.35) Rorisite (Ca,Mg)FCl 2.558(1) 3.119(1) 2.689(0.8) Harrisonite Ca(Fe++,Mg)6(PO4)2(SiO4)2 2.559(1) 1.502(0.8) 1.633(0.4) Vuorelainenite (Mn++,Fe++)(V+++,Cr+++)2O4 2.559(1) 2.521(0.95) 2.371(0.65) Pararammelsbergite NiAs2 2.559(1) 4.05(0.9) 12.2(0.8) Philipsburgite (Cu,Zn)6(AsO4,PO4)2(OH)6·(H2O) 2.56(1) 1.527(0.7) 1.662(0.6) Filipstadite (Mn,Mg)2Sb+++++Fe+++O8 2.56(1) 1.912(0.8) 1.41(0.7) Gudmundite FeSbS 2.56(1) 2.11(0.7) 3.21(0.7) Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 2.56(1) 2.21(0.85) 2.42(0.7) Pianlinite * Al2Si2O6(OH)2 2.56(1) 2.22(0.9) 1.574(0.8) Niobocarbide ! (Nb,Ta)C 2.56(1) 2.66(1) 2.23(0.6) Naumannite Ag2Se 2.56(1) 2.86(0.85) 3.61(0.85) Tephroite Mn2SiO4 2.56(1) 7.1(0.9) 3.548(0.6) Cronstedtite Fe++2Fe+++(SiFe+++)O5(OH)4 2.56(1) 7.16(0.7) 2.888(0.6) Mcgillite (Mn,Fe++)8Si6O15(OH)8Cl2 2.56(1) 7.17(0.9) 3.6(0.7) Friedelite Mn8Si6O15(OH,Cl)10 2.562(1) 4.96(0.7) 5.52(0.7) Shortite Na2Ca2(CO3)3 2.563(1) 1.503(0.4) 3.005(0.35) Jacobsite (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4 2.569(1) 1.54(0.5) 2.873(0.4) Almandine Fe++3Al2(SiO4)3 2.57(1) 1.506(0.4) 3.016(0.4) Iwakiite Mn++(Fe+++,Mn+++)2O4 2.57(1) 4.176(0.38) 2.957(0.3) Yuanfuliite (Mg,Fe++)(Fe+++,Al,Mg,Ti,Fe++)(BO3)O 2.57(1) 5.07(0.8) 2.16(0.6) Azoproite (Mg,Fe++)2(Fe+++,Ti,Mg)BO5 2.573(1) 3.452(0.91) 6.338(0.84) Foitite Na<0,5(Fe++,Al)3Al6Si6O18(BO3)3(OH)4 2.574(1) 1.509(0.45) 1.643(0.35) Ulvospinel TiFe++2O4 2.574(1) 2.729(0.9) 2.707(0.8) Maricite NaFe++PO4 2.574(1) 2.911(0.7) 4.21(0.6) Ardennite (Mn,Ca,Mg)4(Al,Mn,Fe,Mg)6(As,V,P,Si)(O,OH)4(SiO4)2Si3O10(OH, 2.575(1) 5.15(0.3) 1.536(0.17) Vonsenite Fe++2Fe+++BO5 2.576(1) 2.961(0.85) 3.99(0.85) Dravite NaMg3Al6(BO3)3Si6O18(OH)4 2.576(1) 2.961(0.85) 3.99(0.85) Elbaite Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 2.576(1) 2.961(0.85) 3.99(0.85) Schorl NaFe++3Al6(BO3)3Si6O18(OH)4 2.578(1) 2.686(1) 1.435(0.9) Fluorocannilloite CaCa2(Mg4Al)Si5Al3O22F2 2.579(1) 2.557(0.9) 4.619(0.4) Nullaginite Ni2(CO3)(OH)2 2.58(1) 1.5(0.5) 1.6(0.5) Warwickite Mg(Ti,Fe+++,Al)(BO3)O 2.58(1) 2.108(0.56) 5.16(0.22) Sakhaite Ca12Mg4(BO3)7(CO3)4Cl(OH)2·(H2O) 2.58(1) 2.93(1) 1.878(0.6) Sibirskite CaHBO3 2.58(1) 2.96(0.85) 3.99(0.85) Buergerite NaFe+++3Al6(BO3)3Si6O21F 2.58(1) 3.65(0.9) 3.11(0.51) Kenhsuite ! Hg3S2Cl2 2.58(1) 4.53(0.85) 3.64(0.8) Celadonite K(Mg,Fe++)(Fe+++,Al)[Si4O10](OH)2 2.581(1) 1.82(0.7) 3.66(0.5) Koashvite Na6(Ca,Mn)(Ti,Fe)Si6O18·(H2O) 2.581(1) 3.709(1) 3.799(1) Liberite Li2BeSiO4 2.582(1) 4.18(0.9) 2.531(0.7) Olympite LiNa5(PO4)2 2.584(1) 2.501(0.9) 2.927(0.9) Namansilite NaMn+++(Si2O6) 2.584(1) 5.558(0.86) 3.07(0.73) Mozartite CaMn+++SiO4(OH) 2.586(1) 2.979(0.8) 4.24(0.6) Feruvite (Ca,Na)(Fe,Mg,Ti)3(Al,Mg,Fe)6(BO3)3Si6O18(OH)4 2.587(1) 3.68(0.7) 2.516(0.4) Glaukosphaerite (Cu,Ni)2(CO3)(OH)2 2.588(1) 2.364(0.8) 1.546(0.6) Dzharkenite FeSe2 2.589(1) 2.609(0.7) 3.006(0.7) Remondite-(Ce) Na3(Ce,La,Ca,Na,Sr)3(CO3)5 2.59(1) 2.14(0.9) 2.71(0.9) Penzhinite (Ag,Cu)4Au(S,Se)4 2.59(1) 2.2(0.9) 7.21(0.7) Greenalite (Fe++,Fe+++)2-3Si2O5(OH)4 2.59(1) 2.486(0.9) 5.16(0.8) Fredrikssonite Mg2(Mn+++,Fe+++)BO3 2.59(1) 2.49(0.85) 1.89(0.8) Ferroselite FeSe2 2.59(1) 3.29(1) 3(0.8) Crookesite Cu7(Tl,Ag)Se4 2.59(1) 3.92(1) 3.02(0.7) Fedorovskite Ca2(Mg,Mn)2B4O7(OH)6 2.59(1) 4.79(1) 9.54(1) Chalcophyllite Cu++18Al2(AsO4)3(SO4)3(OH)27·33(H2O) 2.59(1) 10.1(1) 4.53(0.8) Glauconite (K,Na)(Fe+++,Al,Mg)2(Si,Al)4O10(OH)2 2.592(1) 1.835(0.35) 2.193(0.35) Skutterudite (Co,Ni)As3-x 2.593(1) 1.746(0.8) 2.365(0.8) Krutovite NiAs2 2.596(1) 2.503(0.9) 1.908(0.8) Costibite CoSbS 2.596(1) 2.531(0.85) 5.192(0.65) Orthopinakiolite (Mg,Mn++)2Mn+++BO5 2.598(1) 2.866(0.9) 5.36(0.8) Nabaphite NaBaPO4·9(H2O) 2.598(1) 2.891(0.7) 4.337(0.6) Frankhawthorneite Cu2Te++++++O4(OH)2 2.598(1) 4.171(0.7) 3.349(0.6) Chantalite CaAl2SiO4(OH)4 2.598(1) 9.326(0.85) 3.418(0.8) Gerstmannite (Mg,Mn)2ZnSiO4(OH)2 2.6(1) 1.56(0.4) 1.61(0.3) Spessartine Mn++3Al2(SiO4)3 2.6(1) 1.816(0.8) 2.52(0.8) Kazakovite Na6(Mn,H2)TiSi6O18 2.6(1) 1.91(0.8) 2.07(0.8) Caswellsilverite NaCrS2 2.6(1) 2.17(0.9) 6.1(0.7) Pokrovskite Mg2(CO3)(OH)2·0.5(H2O) 2.6(1) 2.443(0.6) 7.29(0.5) Dioptase CuSiO2(OH)2 2.6(1) 3.09(0.5) 3.8(0.3) Tachyhydrite CaMg2Cl6·12(H2O) 2.601(1) 1.8388(0.6) 1.501(0.16) Niningerite (Mg,Fe++,Mn)S 2.601(1) 2.13(0.6) 3.01(0.5) Calcioburbankite Na3(Ca,REE,Sr)3(CO3)5 2.602(1) 1.757(0.8) 2.378(0.8) Jolliffeite (Ni,Co)AsSe 2.602(1) 2.469(0.25) 2.731(0.25) Eitelite Na2Mg(CO3)2 2.603(1) 4.128(0.8) 3.711(0.65) Wycheproofite NaAlZr(PO4)2(OH)2·(H2O) 2.604(1) 1.988(0.5) 2.083(0.25) Westerveldite (Fe,Ni,Co)As 2.6047(1) 5.243(0.45) 2.27206(0.4) Blatterite (Mn++,Mg)2(Mn+++,Sb+++,Fe+++)(BO3)O2 2.606(1) 2.07(0.7) 3.508(0.6) Mckinstryite (Ag,Cu)2S 2.606(1) 2.44(0.8) 2.383(0.75) Acanthite Ag2S 2.607(1) 5.22(0.5) 3.7(0.4) Petersenite-(Ce) (Na,Ca)4(Ce,La,Nd,Sr,Pr,Sm,Ba)2(CO3)5 2.608(1) 1.515(0.8) 1.3111(0.25) Lourenswalsite (K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6O14(OH)12 2.608(1) 2.79(1) 1.51(0.99) IMA97.050 BaMn9[(V,As)O4]6(OH)2 2.61(1) 1.84(0.9) 2.13(0.8) Harkerite Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10·2(H2O) 2.61(1) 2.07(0.8) 3.33(0.8) Stromeyerite AgCuS 2.61(1) 2.33(0.9) 1.638(0.8) Lollingite FeAs2 2.61(1) 2.78(1) 3.78(1) Hanksite KNa22(SO4)9(CO3)2Cl 2.61(1) 2.88(1) 4.15(0.75) Tangeite CaCu(VO4)(OH) 2.61(1) 3.25(1) 4.08(1) Thorosteenstrupine (Ca,Th,Mn)3Si4O11F·6(H2O) 2.612(1) 1.847(0.5) 1.509(0.2) Alabandite MnS 2.614(1) 2.84(0.9) 4.02(0.8) Aminoffite Ca3Be2Si3O10(OH)2 2.616(1) 1.636(0.65) 3.509(0.61) IMA97.044 (Mg,Fe)SiO3 2.616(1) 2.765(0.85) 2.414(0.49) Hawthorneite Ba[Ti3Cr4Fe4Mg]O19 2.619(1) 4.26(0.8) 3.36(0.7) Plumbonacrite Pb10(CO3)6O(OH)6 (?) 2.62(1) 2.91(1) 3.88(0.6) Kleinite Hg2N(Cl,SO4)·n(H2O) 2.62(1) 3.008(1) 2.104(0.6) Kornerupine Mg3-4(Al,Fe+++)5,5-6(SiO4,BO4)5(O,OH)2-3 2.62(1) 3.04(0.75) 3.58(0.75) Chromdravite NaMg3(Cr,Fe+++)6(BO3)3Si6O18(OH)4 2.621(1) 2.39(0.7) 1.767(0.6) Willyamite (Co,Ni)SbS 2.622(1) 1.875(0.6) 1.959(0.6) Danielsite (Cu,Ag)14HgS8 2.623(1) 3.29(0.9) 3.61(0.9) Hydrocerussite Pb3(CO3)2(OH)2 2.624(1) 1.55(0.8) 2.726(0.7) Lawsonite CaAl2Si2O7(OH)2·(H2O) 2.624(1) 2.802(0.95) 2.612(0.9) Lindqvistite Pb2(Mn++,Mg)Fe+++16027 2.625(1) 2.679(0.9) 3.734(0.9) Brianite Na2CaMg(PO4)2 2.626(1) 3.02(0.86) 3.2(0.67) Panasqueiraite CaMg(PO4)(OH,F) 2.626(1) 3.151(0.9) 3.769(0.9) Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) 2.628(1) 4.9(0.74) 1.927(0.42) Portlandite Ca(OH)2 2.63(1) 1.622(0.9) 2.78(0.9) Yimengite K(Cr,Ti,Fe,Mg)12O19 2.63(1) 1.853(0.7) 3.33(0.6) Imandrite Na12Ca3Fe+++2Si12O36 2.63(1) 1.89(0.6) 2.82(0.6) Hellandite-(Y) (Ca,Y)6(Al,Fe+++)Si4B4O20(OH)4 2.63(1) 2.77(1) 1.62(0.7) Magnetoplumbite Pb(Fe+++,Mn+++)12O19 2.63(1) 3.02(1) 3.19(1) Isokite CaMg(PO4)F 2.63(1) 3.12(1) 3.62(1) Garavellite FeSbBiS4 2.63(1) 3.68(1) 3.8(0.9) Loseyite (Mn,Zn)7(CO3)2(OH)10 2.63(1) 3.73(0.9) 5.29(0.8) Spertiniite Cu(OH)2 2.63(1) 4.05(0.9) 6.63(0.9) Povondraite (Na,K)(Fe+++,Fe++)3(Fe,Mg,Al)6(BO3)3Si6O18(OH)4 2.63(1) 4.81(1) 5.85(0.9) Libethenite Cu2(PO4)(OH) 2.631(1) 1.966(0.9) 1.77(0.8) Langisite (Co,Ni)As 2.634(1) 2.834(0.95) 3.486(0.8) Willemite Zn2SiO4 2.635(1) 3.965(1) 3.794(0.9) Lithiophosphate Li3PO4 2.637(1) 2.801(1) 3.171(1) Austinite CaZn(AsO4)(OH) 2.639(1) 1.628(0.7) 2.791(0.7) Parsettensite (K,Na,Ca)(Mn,Al)7Si8O20(OH)8·2(H2O) (?) 2.639(1) 3.041(0.8) 5.28(0.7) Burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 2.64(1) 2.71(0.95) 5.42(0.7) Mitscherlichite K2CuCl4·2(H2O) 2.64(1) 2.939(1) 11.4(1) Raite Na4Mn3Si8(O,OH)24·9(H2O) 2.64(1) 3.31(1) 5.28(1) Iraqite-(La) K(La,Ce,Th)2(Ca,Na)4(Si,Al)16O40 2.641(1) 2.795(0.9) 1.634(0.47) Haggertyite Ba[Fe++6Ti5Mg]O19 2.643(1) 2.372(0.8) 1.42(0.7) Urvantsevite Pd(Bi,Pb)2 2.644(1) 3.61(0.9) 3.76(0.9) Tocornalite (Ag,Hg)I (?) 2.644(1) 4.31(1) 3.38(0.8) Montroseite (V+++,Fe+++)O(OH) 2.647(1) 1.847(0.8) 2.6(0.8) Oosterboschite (Pd,Cu)7Se3 2.647(1) 3.071(0.8) 4.892(0.55) Trona Na3(CO3)(HCO3)·2(H2O) 2.648(1) 2.969(0.7) 2.419(0.6) Peterbaylissite Hg+3(CO3)(OH)·2(H2O) 2.649(1) 2.787(1) 3.07(0.9) Hatrurite Ca3SiO5 2.649(1) 3.054(0.45) 3.049(0.4) Nacaphite Na2Ca(PO4)F 2.65(1) 1.58(0.9) 2.96(0.8) Grossular Ca3Al2(SiO4)3 2.65(1) 1.72(0.4) 2.11(0.4) Bafertisite Ba(Fe++,Mn)2TiSi2O7(O,OH)2 2.65(1) 1.913(0.55) 4.97(0.3) Tadzhikite-(Ce) Ca3(Ce,Y)2(Ti,Al,Fe+++)B4Si4O22 2.65(1) 1.913(0.55) 4.97(0.3) Tadzhikite-(Y) Ca3(Y,Ce)2(Ti,Al,Fe3+)B4Si4O22 2.65(1) 2.16(0.9) 2.25(0.5) Polarite Pd2PbBi 2.65(1) 2.16(0.9) 2.5(0.6) Borishanskiite Pd1+x(As,Pb)2, x = 0-0.2 2.65(0.5) 2.74(0.4) 4.64(0.3) Bayankhanite * Cu6HgS4 2.65(1) 2.78(0.5) 7.19(0.5) Brownmillerite Ca2(Al,Fe+++)2O5 2.65(1) 3.02(0.6) 3.95(0.6) Grechishchevite Hg3S2(Br,Cl,I)2 2.65(1) 3.69(0.9) 2.9(0.8) Clerite ! MnSb2S4 2.651(1) 4.38(0.6) 4.965(0.6) Manganostibite (Mn++,Fe++)7(SbO4)(AsO4,SiO4)O4 2.654(1) 2.862(0.55) 3.479(0.4) Okayamalite ! Ca2B2SiO7 2.655(1) 2.999(1) 3.303(0.9) Strakhovite NaBa3(Mn++,Mn+++)4Si6O19(OH)3 2.655(1) 8.06(0.8) 3.3(0.6) Wattersite Hg+4Hg++Cr++++++O6 2.656(1) 3.11(1) 5.3(1) Berborite Be2(BO3)(OH,F)·(H2O) 2.657(1) 2.446(0.8) 7.5633(0.8) Zinalsite Zn2AlSi2O5(OH)4·2(H2O) (?) 2.657(1) 2.607(0.8) 3.304(0.7) Combeite Na2Ca2Si3O9 2.658(1) 2.778(1) 2.887(0.84) Barentsite Na7AlH2(CO3)4F4 2.66(1) 1.78(0.4) 2.41(0.4) Ullmannite NiSbS 2.66(1) 1.961(0.9) 1.811(0.8) Nickeline * NiAs 2.66(1) 2.61(0.75) 3.29(0.4) Gregoryite * (Na2,K2,Ca)CO3 2.66(1) 2.8(0.7) 1.94(0.4) Nagelschmidtite Ca3(PO4)2·2(a-Ca2SiO4) 2.66(1) 3.08(0.62) 2.19(0.55) Khanneshite (NaCa)3(Ba,Sr,Ce,Ca)3(CO3)5 2.66(1) 3.14(1) 4.12(1) Garronite Na2Ca5Al12Si20O64·27(H2O) 2.66(1) 3.32(1) 2.57(0.8) Bradleyite Na3Mg(PO4)(CO3) 2.662(1) 1.845(0.7) 1.652(0.6) Manganarsite Mn++3As+++204(OH)4 2.662(1) 2.035(0.8) 2.29(0.8) Fischesserite Ag3AuSe2 2.662(1) 2.677(1) 2.418(0.95) Arsenopyrite FeAsS 2.662(1) 2.836(0.9) 1.572(0.5) Tomichite AsTi3(V,Fe)4O13(OH) 2.662(1) 4.386(1) 4.733(1) Flinkite Mn++2Mn+++(AsO4)(OH)4 2.663(1) 1.687(0.8) 3.18(0.8) Zenzenite Pb3(Fe+++,Mn+++)4Mn++++3O15 2.663(1) 2.73(1) 2.259(0.8) Bredigite Ca7Mg(SiO4)4 2.664(1) 2.129(0.85) 2.122(0.16) Nanpingite CsAl2(Si,Al)4O10(OH,F)2 2.664(1) 2.585(0.7) 5.35(0.7) Hulsite (Fe++,Mg)2(Fe+++,Sn)BO5 2.664(1) 3.637(0.6) 3.762(0.6) Capgaronnite HgAg(Cl,Br,I)S 2.666(1) 1.54(0.5) 2.901(0.4) IMA97.013 Ca8Mg(SiO4)4Cl2 2.666(1) 2.586(0.4) 3.637(0.4) Monticellite CaMgSiO4 2.666(1) 3.057(0.95) 6.32(0.95) Oxammite (NH4)2(C2O4)·(H2O) 2.669(1) 2.878(0.8) 5.68(0.7) Comancheite Hg13(Cl,Br)8O9 2.669(1) 3.214(0.53) 5.333(0.37) Ellisite Tl3AsS3 2.669(1) 3.91(0.6) 1.788(0.5) Jarosewichite Mn++3Mn+++(AsO4)(OH)6 2.67(1) 2.42(0.9) 8.18(0.7) Natrophosphate Na7(PO4)2F·19(H2O) 2.67(1) 2.64(0.9) 6.71(0.6) Natrofairchildite Na2Ca(CO3)2 2.67(1) 2.7(1) 3.12(1) Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) 2.67(1) 3.25(0.6) 3.12(0.5) Ilimaussite-(Ce) Ba2Na4CeFe+++Nb2Si8O28·5(H2O) 2.671(1) 1.89(0.63) 3.087(0.29) Carobbiite KF 2.673(1) 2.96(1) 4.81(0.9) Clinotyrolite Ca2Cu9[(As,S)O4]4(O,OH)10·10(H2O) 2.674(1) 2.693(1) 6.15(0.6) Ferrowyllieite (Na,Ca,Mn)(Fe++,Mn)(Fe++,Fe+++,Mg)Al(PO4)3 2.674(1) 2.693(1) 6.15(0.6) Rosemaryite (Na,Ca,Mn++)(Mn++,Fe++)(Fe+++,Fe++,Mg)Al(PO4)3 2.674(1) 2.693(1) 6.15(0.6) Wyllieite (Na,Ca,Mn++)(Mn++,Fe++)(Fe++,Fe+++,Mg)Al(PO4)3 2.674(1) 3.773(0.9) 8.036(0.85) Abenakiite-(Ce) Na26REE6(SiO3)6(PO4)6(CO3)6(S++++O2)O 2.674(1) 4.187(0.76) 2.459(0.4) Tychite Na6Mg2(CO3)4(SO4) 2.675(1) 2.883(0.9) 3.96(0.7) Imhofite Tl6CuAs16S40 2.675(1) 7.13(0.8) 3.564(0.6) Ferropyrosmalite (Fe++,Mn)8Si6O15(Cl,OH)10 2.676(1) 3.23(0.6) 9.8(0.6) Johninnesite Na2Mn++9(Mg,Mn++)7(OH)8(AsO4)2(Si6O17)2 2.676(1) 3.69(1) 7.381(1) Srebrodolskite Ca2Fe+++2O5 2.68(1) 2.08(0.4) 5.9(0.32) Molysite Fe+++Cl3 2.68(1) 2.9(1) 2.69(0.7) Epidote Ca2(Fe+++,Al)3(SiO4)3(OH) = Ca2(Fe,Al)Al2(SiO4)(Si2O7)O(OH) 2.68(1) 4.18(0.9) 2.47(0.8) Ferrotychite Na6Fe++2(SO4)(CO3)4 2.68(1) 4.76(0.81) 2.656(0.5) Reppiaite Mn++[(V,As)O4(OH)2]2 2.68(1) 4.89(0.95) 2.45(0.5) Mayenite Ca12Al14O33 2.681(1) 2.846(0.8) 1.5825(0.5) IMA96.010 (Fe3+,Ti)4Ti3AsO13(OH) 2.684(1) 2.999(0.7) 1.603(0.6) Uvarovite Ca3Cr2(SiO4)3 2.686(1) 2.593(0.75) 3.42(0.6) Hagendorfite NaCaMn(Fe++,Fe+++,Mg)2(PO4)3 2.686(1) 3.003(0.42) 2.452(0.39) Wadalite Ca6(Al,Si,Mg,Fe)7O16Cl3 2.6865(1) 2.6712(0.65) 2.653(0.47) Merwinite Ca3Mg(SiO4)2 2.688(1) 3.005(0.65) 1.607(0.49) Goldmanite Ca3(V,Al,Fe+++)2(SiO4)3 2.69(1) 1.69(0.6) 2.51(0.5) Hematite Fe2O3 2.69(1) 2.87(0.65) 4.03(0.5) Zoisite Ca2Al3(SiO4)3(OH) = Ca2AlAl2(SiO4)(Si2O7)O(OH) 2.692(1) 2.79(0.55) 2.24(0.45) Carbonate-fluorapatite Ca5(PO4,CO3)3F 2.693(1) 3.012(1) 2.372(0.8) Staurolite (Fe++,Mg,Zn)2Al9(Si,Al)4O22(OH)2 2.693(1) 3.11(0.8) 8.38(0.65) Kaersutite NaCa2(Mg4Ti)Si6Al2O23(OH)2 2.694(1) 12(1) 2.598(0.55) Eggletonite (Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7·11(H2O) 2.695(1) 2.788(0.5) 2.817(0.5) Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 2.695(1) 4.22(0.76) 2.474(0.7) Manganotychite Na6(Mn++,Fe++,Mg)2(SO4)(CO3)4 2.696(1) 1.6112(0.6) 3.015(0.6) Andradite Ca3Fe+++2(SiO4)3 2.697(1) 2.015(0.9) 2.9(0.8) Teepleite Na2B(OH)4Cl 2.698(1) 2.91(0.9) 2.622(0.6) Dissakisite-(Ce) Ca(Ce,La)(Mg,Fe++)(Al,Fe+++)2Si3O12(OH) 2.699(1) 2.528(0.9) 8.4(0.9) Winchite ?(CaNa)Mg4(AL,Fe+++)Si8O22(OH)2 2.7(1) 1.91(0.5) 2.72(0.4) Perovskite CaTiO3 2.7(1) 2.015(0.8) 1.806(0.6) Sederholmite NiSe 2.7(1) 2.23(0.8) 3.81(0.6) Empressite AgTe 2.7(1) 2.83(1) 3.06(1) Saneroite Na2(Mn++,Mn+++)10Si11VO34(OH)4 2.7(1) 2.985(1) 7.93(1) Clinoholmquistite ?(Li2Mg3Al2)Si8O22(OH)2 2.7(1) 3.03(0.95) 2.67(0.79) Cassidyite Ca2(Ni,Mg)(PO4)2·2(H2O) 2.7(1) 5.3(1) 4.08(0.55) Kermesite Sb2S2O 2.7(1) 5.75(1) 2.445(0.9) Claringbullite Cu++4(OH)7Cl 2.701(1) 2.646(0.65) 2.667(0.6) Spurrite Ca5(SiO4)2(CO3) 2.702(1) 1.6507(0.3) 2.35(0.15) Abswurmbachite Cu++Mn+++6SiO12 2.702(1) 1.887(0.8) 3.15(0.8) Trechmannite AgAsS2 2.702(1) 3.499(1) 4.644(0.55) Pucherite BiVO4 2.703(1) 2.8756(0.9) 2.7894(0.8) Heneuite CaMg5(PO4)3(CO3)(OH) 2.703(1) 6.24(0.7) 3.085(0.55) Ferroalluaudite NaCaFe++(Fe++,Mn,Fe+++,Mg)2(PO4)3 2.704(1) 4.393(0.9) 5.06(0.9) Orientite Ca2Mn++Mn+++2Si3O10(OH)4 2.706(1) 2.446(0.8) 8.11(0.7) Lesukite ! Al2(OH)5Cl·2(H2O) 2.709(1) 1.758(0.8) 2.419(0.8) Viaeneite ! (Fe,Pb)4S8O 2.709(1) 2.839(0.85) 7.28(0.7) Ilvaite CaFe++2Fe+++Si2O7O(OH) 2.709(1) 5.05(0.8) 1.689(0.7) Natisite Na2(TiO)SiO4 2.71(1) 1.76(0.63) 3.44(0.4) Marcasite FeS2 2.71(1) 2.536(0.92) 3.404(0.57) Fluoro-ferroleakeite NaNa2(Fe++2Fe+++2Li)Si8O22F2 2.71(1) 2.76(1) 3.9(0.6) Hematophanite Pb4Fe+++3O8(OH,Cl) 2.71(1) 3.01(0.9) 4.13(0.8) Galileiite ! NaFe++4(PO4)3 2.71(1) 3.14(1) 3.17(1) Chevkinite-(Ce) (Ce,La,Ca,Na,Th)4(Fe++,Mg2((Ti,Fe+++)3Si4O22 2.71(1) 3.19(0.7) 4.25(0.7) Gismondine Ca2Al4Si4O16·9(H2O) 2.712(1) 2.349(0.88) 1.661(0.43) Monteponite CdO 2.712(1) 2.59(0.9) 6.94(0.4) Uytenbogaardtite Ag3AuS2 2.712(1) 3.023(0.9) 2.477(0.8) Krutaite CuSe2 2.712(1) 3.035(0.8) 2.475(0.6) Schorlomite Ca3Ti++++2(Fe+++2Si)O12 2.7132(1) 1.699(0.85) 2.4774(0.8) Karelianite V2O3 2.714(1) 2.882(0.94) 4.55(0.63) Pyrocoproite * (Mg(K,Na))2P2O7 2.714(1) 3.12(0.9) 2.502(0.8) Glaucophane ?Na2(Mg3Al2)Si8O22(OH)2 2.714(1) 3.61(0.9) 5.43(0.8) Clinobehoite Be(OH)2 2.714(1) 6.77(0.8) 2.674(0.75) Balangeroite (Mg,Fe+++,Fe++,Mn++)42Si16O54(OH)40 2.715(1) 1.859(0.5) 1.983(0.5) Sudovikovite ! PtSe2 2.715(1) 2.298(0.36) 1.683(0.24) Indium In 2.715(1) 3.51(0.8) 1.84(0.5) Retzian-(La) (Mn,Mg)2(La,Ce,Nd)(AsO4)(OH)4 2.717(1) 2.757(1) 4.04(0.8) Soucekite PbCuBi(S,Se)3 2.717(1) 2.811(0.8) 2.261(0.35) Carbonate-hydroxylapatite Ca5(PO4,CO3)3(OH) 2.717(1) 3.553(0.8) 1.848(0.5) Retzian-(Ce) Mn2Ce(AsO4)(OH)4 2.718(1) 2.497(0.9) 3.53(0.9) Bideauxite Pb2AgCl3(F,OH)2 2.72(1) 1.656(0.7) 2.14(0.5) Braunite-I Mn++Mn+++6SiO12 2.72(1) 1.656(0.7) 2.14(0.5) Braunite-II * Mn++Mn+++6SiO12 2.72(1) 1.657(0.9) 1.421(0.8) Bixbyite (Mn+++,Fe+++)2O3 2.72(1) 1.827(0.9) 2.45(0.8) Glaucodot (Co,Fe)AsS 2.72(1) 2.6(0.8) 3.72(0.7) Natrophilite NaMnPO4 2.72(1) 2.78(1) 3.06(0.8) Tundrite-(Ce) Na3(Ce,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)·2(H2O) 2.72(1) 3.039(0.72) 1.626(0.56) Morimotoite Ca3TiFe++Si3O12 2.72(1) 3.18(0.8) 4.48(0.7) Rankinite Ca3Si2O7 2.72(1) 3.79(0.9) 1.91(0.8) Buchwaldite NaCaPO4 2.72(1) 3.85(0.8) 1.749(0.7) Seligmannite PbCuAsS3 2.72(1) 8.42(1) 3.09(0.8) Riebeckite ?Na2(Fe++3Fe+++2)Si8O22(OH)2 2.72(1) 8.9(1) 3.29(0.9) Kolfanite Ca2Fe+++3O2(AsO4)3·2(H2O) 2.722(1) 2.218(0.7) 2.527(0.55) Geikielite MgTiO3 2.722(1) 4.22(0.9) 3.141(0.8) Amicite K2Na2Al4Si4O16·5(H2O) 2.723(1) 2.992(0.9) 3.11(0.8) Prosperite CaZn2(AsO4)2·(H2O) 2.724(1) 2.639(0.57) 2.55(0.5) Clinophosinaite Na3CaPSiO7 2.725(1) 2.916(0.9) 2.999(0.8) Marsturite NaCaMn3Si5O14(OH) 2.725(1) 3.05(0.8) 2.061(0.75) Congolite (Fe++,Mg,Mn)3B7O13Cl 2.726(1) 3.534(0.6) 4.89(0.3) Retzian-(Nd) Mn2(Nd,Ce,La)(AsO4)(OH)4 2.726(1) 5.472(0.32) 3.455(0.17) Hejtmanite Ba(Mn,Fe++)2TiO(Si2O7)(OH,F)2 2.727(1) 3.448(0.87) 3.896(0.66) Cesanite Na3Ca2(SO4)3(OH) 2.728(1) 1.672(0.85) 1.427(0.6) Neltnerite CaMn+++6SiO12 2.729(1) 2.007(0.45) 1.51(0.35) Kitkaite NiTeSe 2.729(1) 2.916(1) 3.42(0.55) Parwelite (Mn,Mg)5Sb(As,Si)2O12 2.73(1) 2.53(0.9) 1.71(0.7) Ecandrewsite (Zn,Fe++,Mn++)TiO3 2.73(1) 2.84(1) 3.28(1) Semenovite (Ca,Ce,La,Na)10-12(Fe++,Mn)(Si,Be)20(O,OH,F)48 2.73(1) 2.88(0.9) 2.59(0.7) Cebollite Ca2(Mg,Fe++,Al)Si2(O,OH)7 2.73(1) 3.3(1) 3.58(1) Vaterite CaCO3 2.73(1) 6.3(0.8) 3.07(0.65) Alluaudite NaCaFe++(Mn,Fe++,Fe+++,Mg)2(PO4)3 2.732(1) 2.914(1) 5.523(0.8) Melanotekite Pb2Fe+++2Si2O9 2.736(1) 5.34(0.65) 3.69(0.5) Artinite Mg2(CO3)(OH)2·3(H2O) 2.737(1) 2.874(0.7) 4.075(0.5) Schreyerite V+++2Ti3O9 2.74(1) 1.582(0.25) 3.87(0.25) Salammoniac NH4Cl 2.74(1) 1.768(0.5) 2.685(0.45) Bournonite PbCuSbS3 2.74(1) 2.194(0.55) 2.437(0.55) Kraisslite (Mn++,Mg)24Zn3Fe+++(As+++O3)2(As+++++O4)3(SiO4)6(OH)18 2.74(1) 2.48(0.9) 3.27(0.8) Proustite Ag3AsS3 2.74(1) 2.56(0.4) 3.4(0.4) Varulite NaCaMn(Mn,Fe++,Fe+++)2(PO4)3 2.74(1) 2.77(1) 1.87(0.9) Ruarsite RuAsS 2.74(1) 2.86(0.8) 1.68(0.7) Mosesite Hg2N(Cl,SO4,MoO4,CO3)·(H2O) 2.74(1) 2.86(1) 2.9(1) Kentrolite Pb2Mn+++2Si2O9 2.74(1) 3.78(0.7) 3.05(0.6) Hutchinsonite (Pb,Tl)2As5S9 2.74(1) 7.44(0.55) 2.566(0.53) Phosinaite-(Ce) * Na13Ca2Ce[Si4O12](PO4) 2.741(1) 1.692(0.45) 3.543(0.36) Gaspeite (Ni,Mg,Fe++)CO3 2.742(1) 2.102(0.45) 1.7(0.35) Magnesite MgCO3 2.743(1) 2.872(1) 5.511(0.8) Gianellaite Hg4(SO4)N2 2.743(1) 3.212(0.7) 3.722(0.4) Yecoraite Bi5Fe+++3(Te++++O3)(Te++++++O4)2O9·9(H2O) 2.743(1) 3.551(0.4) 1.702(0.3) Sphaerocobaltite CoCO3 2.744(1) 3.195(0.6) 4.06(0.5) Nickenichite Na0,8Ca0,4(Mg,Fe+++,Al)3Cu0,4(AsO4)3 2.744(1) 3.887(0.79) 1.942(0.57) Latrappite (Ca,Na)(Nb,Ti,Fe)O3 2.746(1) 1.587(0.5) 1.942(0.4) Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 2.746(1) 2.768(1) 2.461(0.8) Imiterite Ag2HgS2 2.746(1) 3.43(0.32) 13.8(0.25) Arctite Na2Ca4(PO4)3F 2.748(1) 1.443(0.35) 1.475(0.33) Paranatisite Na2(TiO)SiO4 2.749(1) 2.814(0.94) 2.391(0.85) Fetiasite (Fe++,Fe+++,Ti++++)3O2(As+++2O5) 2.749(1) 3.345(0.9) 5.57(0.35) Lorenzenite Na2Ti2Si2O9 2.749(1) 3.58(1) 4.8(0.9) Edingtonite BaAl2Si3O10·4(H2O) 2.75(1) 1.65(0.7) 1.71(0.7) Berzeliite (Ca,Na)3(Mg,Mn)2(AsO4)3 2.75(1) 2(0.3) 2.98(0.3) Griphite Na4Ca6(Mn,Fe++,Mg)19Li2Al8(PO4)24(F,OH)8 2.75(1) 2.46(0.6) 1.66(0.55) Cattierite CoS2 2.75(1) 2.47(0.9) 1.82(0.7) Alloclasite (Co,Fe)AsS 2.75(1) 2.516(0.8) 4.37(0.6) Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 2.75(1) 2.87(0.8) 3.12(0.7) Babingtonite Ca2(Fe++,Mn)Fe+++Si5O14(OH) 2.75(1) 2.97(0.5) 3.6(0.5) Leucophanite (Na,Ca)2BeSi2(O,OH,F)7 2.75(1) 3.25(0.8) 4.06(0.5) Johillerite Na(Mg,Zn)3Cu(AsO4)3 2.75(1) 3.32(1) 3.03(0.9) Denisovite (K,Na)Ca2Si3O8(F,OH) 2.75(1) 3.34(0.8) 2.85(0.7) Sarcolite Na,Ca6Al4Si6O24F (?) 2.75(1) 3.45(1) 3(0.7) Marrite PbAgAsS3 2.75(1) 3.55(0.5) 1.703(0.45) Smithsonite ZnCO3 2.75(1) 3.6(0.8) 3.39(0.7) Rathite (Pb,Tl)3As5S10 2.752(1)