矿物晶体学数据

CRYSTALLOGRAPHIC DATA ON MINERALS This table contains x-ray crystallographic data on about 400 common minerals, as well as selected crystalline elements. Entries are arranged alphabetically by mineral name. The columns are: Name: Common name of the mineral. Formula: Chemical formula for a typical sample of the mineral. Composition often varies considerably with the origin of the sample. Crystal system: tricl = triclinic; monocl = monoclinic; orth = orthorhombic; tetr = tetragonal; hex = hexagonal; rhomb = rhombohedral; cubic = cubic. Structure type: Prototype for the structural arrangement of the crystallographic cell. Z: Number of formula units per the unit cell. a, b, c: Lengths of the cell edges in Å (1Å = 10-8 cm). α, β, γ : Angles between cell axes. References 1. Robie, R.A., Bethke, P.M., and Beardsley, K.M., U. S. Geological Survey Bulletin 1248, U. S. Government Printing Office, Washington, D.C. 2. Donnay, J.D.H., and Ondik, H.M., Crystal Data Determinative Tables, Third Edition, Volume 2, Inorganic Compounds, Joint Committee on Powder Diffraction Standards, Swarthmore, PA, 1973. 3. Deer, W.A., Howie, R.A., and Zussman, J., An Introduction to the Rock-Forming Minerals, 2nd Edition, Longman Scientific & Technical, Harlow, Essex, 1992. Name Formula Crystal system Structure type Z a/Å b/Å c/Å α β γ Acanthite Ag 2 S monocl 4 4.228 6.928 7.862 99.58° Acmite (Aegirine) NaFe(SiO 3 ) 2 monocl diopside 4 9.658 8.795 5.294 107.42° Akermanite Ca 2 MgSi 2 O 7 tetr melilite 2 7.8435 5.010 Alabandite MnS cubic rock salt 4 5.223 Almandine (Almandite) Fe 3 Al 2 Si 3 O 12 cubic garnet 8 11.526 Altaite PbTe cubic rock salt 4 6.4606 Aluminum Al cubic copper 4 4.049 Alunite KAl 3 (SO 4 ) 2 (OH) 6 rhomb 3 6.982 17.32 Analcite NaAlSi 2 O 6 ·H 2 0 cubic 16 13.733 Anatase TiO 2 tetr 4 3.785 9.514 Andalusite Al 2 OSiO 4 orth 4 7.7959 7.8983 5.5583 Andradite Ca 3 Fe 2 Si 3 O 12 cubic garnet 8 12.048 Anglesite PbSO 4 orth barite 4 8.480 5.398 6.958 Anhydrite CaSO 4 orth anhydrite 4 6.991 6.996 6.238 Annite KFe 3 [AlSi 3 O 10 ](OH) 2 monocl 1M mica 2 10.29 9.33 5.39 105.1° Anorthite CaAl 2 Si 2 O 8 tricl primitive cell 8 8.177 12.877 14.169 93.17° 115.85° 91.22° Anthophyllite Mg 7 Si 8 O 22 (OH) 2 orth 4 18.61 18.01 5.24 Antimony Sb rhomb arsenic 6 4.2996 11.2516 Aragonite CaCO 3 orth aragonite 4 5.741 7.968 4.959 Arcanite K 2 SO 4 orth arcanite 4 5.772 10.072 7.483 Argentite Ag 2 S cubic 2 4.870 Argentopyrite AgFe 2 S 3 orth 4 6.64 11.47 6.45 Arsenic As rhomb arsenic 6 3.760 10.555 Arsenolite As 2 O 3 cubic diamond 16 11.074 Arsenopyrite FeAsS tricl 4 5.760 5.690 5.785 90.00° 112.23° 90.00° Azurite Cu 3 (OH) 2 (CO 3 ) 2 monocl 2 5.008 5.844 10.336 92.45° Baddeleyite ZrO 2 monocl baddeleyite 4 5.1454 5.2075 5.3107 99.23° Banalsite BaNa 2 Al 4 Si 4 O 16 orth 4 8.50 9.97 16.72 Barite BaSO 4 orth barite 4 8.878 5.450 7.152 Berlinite AlPO 4 hex α-quartz 3 4.942 10.97 Beryl Be 3 Al 2 (SiO 3 ) 6 hex beryl 2 9.215 9.192 Berzelianite Cu 2 Se cubic 4 5.85 Bismite Bi 2 O 3 monocl pseudo-orth 4 7.48 8.14 5.83 112.9° Bismuth Bi rhomb arsenic 6 4.5367 11.8383 Bismuthinite Bi 2 S 3 orth stibnite 4 11.150 11.300 3.981 Bixbyite Mn 2 O 3 cubic thallium trioxide 16 9.411 Boehmite AlO(OH) orth lepidocrocite 4 2.868 12.227 3.700 Borax Na 2 B 4 O 7 ·10H 2 O monocl 4 11.858 10.674 12.197 106.68° 4-148 Section4.indb 148 5/2/05 9:25:40 AM Name Formula Crystal system Structure type Z a/Å b/Å c/Å α β γ Bornite (metastable) Cu 5 FeS 4 cubic 8 10.94 Breithauptite NiSb hex niccolite 2 3.942 5.155 Brochantite Cu 4 SO 4 (OH) 6 monocl 4 13.066 9.85 6.022 103.27° Bromargyrite AgBr cubic rock salt 4 5.7745 Bromellite BeO hex zincite 2 2.6979 4.3772 Brookite TiO 2 orth 8 5.456 9.182 5.143 Brucite Mg(OH) 2 hex cadmium iodide 1 3.147 4.769 Bunsenite NiO cubic rock salt 4 4.177 Bustamite CaMn(SiO 3 ) 2 tricl 6 7.736 7.157 13.824 90.52° 94.58° 103.87° Cadmium telluride CdTe cubic sphalerite 4 6.4805 Cadmoselite CdSe hex zincite 2 4.2977 7.0021 Calcite CaCO 3 rhomb calcite 6 4.9899 17.064 Calomel Hg 2 Cl 2 tetr 4 4.478 10.910 Carbonate-apatite Ca 10 (PO 4 ) 6 CO 3 ·H 2 O hex apatite 1 9.436 6.883 Cassiterite SnO 2 tetr rutile 2 4.738 3.188 Cattierite CoS 2 cubic pyrite 4 5.5345 Celestite SrSO 4 orth barite 4 8.359 5.352 6.866 Celsian BaAl 2 Si 2 O 8 monocl 8 8.627 13.045 14.408 115.20° Cerianite CeO 2 cubic fluorite 4 5.4110 Cerussite PbCO 3 orth aragonite 4 6.152 8.436 5.195 Cervantite Sb 2 O 4 orth 4 5.424 11.76 4.804 Chalcanthite CuSO 4 ·5H 2 O tricl 2 6.1045 10.72 5.949 97.57° 107.28° 77.43° Chalcocite Cu 2 S orth 96 11.881 27.323 13.491 Chalcopyrite CuFeS 2 tetr 4 5.2988 10.434 Chlorapatite Ca 5 (PO 4 ) 3 Cl hex apatite 2 9.629 6.777 Chlorargyrite AgCl cubic rock salt 4 5.5491 Chloritoid FeAl 4 O 2 (SiO 4 ) 2 (OH) 4 monocl 8 9.48 5.48 18.18 101.77° Chloromagnesite MgCl 2 rhomb 3 3.632 17.795 Chondrodite 2Mg 2 SiO 4 ·MgF 2 monocl 2 7.89 4.743 10.29 109.03° Chrysoberyl BeAl 2 O 4 orth olivine 4 5.4756 9.4041 4.4267 Cinnabar HgS hex cinnabar 3 4.149 9.495 Claudetite As 2 O 3 monocl 4 5.339 12.984 4.5405 94.27° Clausthalite PbSe cubic rock salt 4 6.1255 Clinoenstatite MgSiO 3 monocl 8 9.620 8.825 5.188 108.33° Clinoferrosilite FeSiO 3 monocl 8 9.7085 9.0872 5.2284 108.43° Clinohumite 4Mg 2 SiO 4 ·MgF 2 monocl 2 13.68 4.75 10.27 100.83° Clinozoisite Ca 2 Al 3 (SiO 4 ) 3 OH monocl 2 8.887 5.581 10.14 115.93° Cobalt olivine Co 2 SiO 4 orth olivine 4 4.782 10.301 6.003 Cobalt oxide CoO cubic rock salt 4 4.260 Cobalt sulfide CoS cubic sphalerite 4 5.339 Cobalt titanate CoTiO 3 rhomb ilmenite 6 5.066 13.918 Cobalticalcite CoCO 3 rhomb calcite 6 4.6581 14.958 Cobaltite CoAsS cubic NiSbS 4 5.60 Coesite SiO 2 monocl 16 7.152 12.379 7.152 120.00° Coffinite USiO 4 tetr zircon 4 6.995 6.263 Colemanite Ca 2 B 6 O 11 ·5H 2 O monocl 4 8.743 11.264 6.102 110.12° Coloradoite HgTe cubic sphalerite 4 6.4600 Cooperite PtS tetr 2 3.4699 6.1098 Copper Cu cubic face-centered cubic 4 3.6150 Corundum Al 2 O 3 rhomb corundum 6 4.7591 12.9894 Cotunnite PbCl 2 orth 4 4.535 7.62 9.05 Covellite CuS hex 6 3.792 16.34 Cristobalite (α) SiO 2 tetr 4 4.971 6.918 Cristobalite (β) SiO 2 cubic 8 7.1382 Cryolite Na 3 AlF 6 monocl 2 5.40 5.60 7.776 90.18° Cubanite CuFe 2 S 3 orth 4 6.46 11.12 6.23 Cummingtonite (Mg,Fe,Mn) 7 (Si 4 O 11 ) 2 (OH) 2 monocl tremolite 2 9.522 18.223 5.332 101.92° Cuprite Cu 2 O cubic 2 4.2696 Danburite CaB 2 Si 2 O 8 orth 4 8.04 8.77 7.74 Crystallographic Data on Minerals 4-149 Section4.indb 149 5/2/05 9:25:42 AM Name Formula Crystal system Structure type Z a/Å b/Å c/Å α β γ Datolite CaBSiO 4 (OH) monocl 4 9.62 7.60 4.84 90.15° Daubreeite FeCr 2 S 4 cubic spinel 8 9.966 Diamond C cubic diamond 8 3.5670 Diaspore AlO(OH) orth 4 4.401 9.421 2.845 Dickite Al 2 Si 2 O 5 (OH) 4 monocl 4 5.150 8.940 14.736 103.58° Digenite Cu 1.79 S cubic deformed fluorite 4 5.5695 Diopside CaMg(SiO 3 ) 2 monocl diopside 4 9.743 8.923 5.251 105.93° Dioptase CuSiO 2 (OH) 2 rhomb phenacite 18 14.61 7.80 Dolerophanite Cu 2 O(SO 4 ) monocl 4 8.334 6.312 7.628 108.4° Dolomite CaMg(CO 3 ) 2 rhomb calcite 3 4.8079 16.010 Dravite NaMg 3 Al 6 B 3 Si 6 O 27 (OH) 4 rhomb tourmaline 3 15.942 7.224 Elbaite NaLiAl 7.67 B 3 Si 6 O 27 (OH) 4 rhomb tourmaline 3 15.842 7.009 Enargite Cu 3 AsS 4 orth 2 6.426 7.422 6.144 Enstatite MgSiO 3 orth 16 8.829 18.22 5.192 Epidote Ca 2 Al 2 (Al,Fe)OH(SiO 4 ) 3 monocl 2 8.89 5.63 10.19 115.40° Epsomite MgSO 4 ·7H 2 O orth 4 11.86 11.99 6.858 Eskolaite Cr 2 O 3 rhomb corundum 6 4.9607 13.599 Eucairite AgCuSe orth 10 4.105 20.35 6.31 Euclase AlBeSiO 4 (OH) monocl 4 4.763 14.29 4.618 100.25° Famatimite Cu 3 SbS 4 tetr 2 5.384 10.770 Fayalite Fe 2 SiO 4 orth olivine 4 4.817 10.477 6.105 Fe-Cordierite Fe 2 Al 3 (AlSi 5 O 18 ) orth cordierite 4 9.726 17.065 9.287 Fe-Gehlenite Ca 2 Fe 2 SiO 7 tetr melilite 2 7.54 4.855 Fe-Indialite Fe 2 Al 3 (AlSi 5 O 18 ) hex beryl 2 9.860 9.285 Fe-Leucite KFeSi 2 O 6 tetr 16 13.205 13.970 Fe-Microcline KFeSi 3 O 8 tricl 4 8.68 13.10 7.340 90.75° 116.05° 86.23° Fe-Sanidine KFeSi 3 O 8 monocl 4 8.689 13.12 7.319 116.10° Fe-Skutterudite FeAs 2.95 cubic 8 8.1814 Ferberite FeWO 4 monocl wolframite 2 4.732 5.708 4.965 90.00° Ferriannite KFe 3 [FeSi 3 O 10 ](OH) 2 monocl 2 5.430 9.404 10.341 100.07° Ferroselite FeSe 2 orth marcasite 2 4.801 5.778 3.587 Ferrotremolite Ca 2 Fe 5 [Si 8 O 22 ](OH) 2 monocl tremolite 2 9.97 18.34 5.30 104.50° Fluor-edenite NaCa 2 Mg 5 [AlSi 7 O 22 ]F 2 monocl tremolite 2 9.847 18.00 5.282 104.83° Fluor-humite 3Mg 2 SiO 4 ·MgF 2 orth 4 10.243 20.72 4.735 Fluor-norbergite Mg 2 SiO 4 ·MgF 2 orth 4 8.727 10.271 4.709 Fluor-phlogopite KMg 3 [AlSi 3 O 10 ]F 2 monocl 1M mica 2 5.299 9.188 10.135 99.92° Fluor-richterite Na 2 CaMg 5 [Si 8 O 22 ]F 2 monocl tremolite 2 9.823 17.96 5.268 104.33° Fluor-tremolite Ca 2 Mg 5 [Si 8 O 22 ]F 2 monocl tremolite 2 9.781 18.01 5.267 104.52° Fluorapatite Ca 5 (PO 4 ) 3 F hex apatite 2 9.3684 6.8841 Fluorite CaF 2 cubic fluorite 4 5.4638 Forsterite Mg 2 SiO 4 orth olivine 4 4.758 10.214 5.984 Frohbergite FeTe 2 orth marcasite 2 5.265 6.265 3.869 Gahnite ZnAl 2 O 4 cubic spinel 8 8.0848 Galaxite MnAl 2 O 4 cubic spinel 8 8.258 Galena PbS cubic rock salt 4 5.9360 Gallium oxide Ga 2 O 3 rhomb corundum 6 4.9793 13.429 Gehlenite Ca 2 Al 2 SiO 7 tetr melilite 2 7.690 5.0675 Geikielite MgTiO 3 rhomb ilmenite 6 5.054 13.898 Gerhardite Cu 2 (NO 3 )(OH) 3 orth 4 6.075 13.812 5.592 Gersdorfite NiAsS cubic 4 5.693 Gibbsite Al(OH) 3 monocl 8 9.719 5.0705 8.6412 94.57° Glauchroite CaMnSiO 4 orth olivine 4 4.944 11.19 6.529 Glaucodot (Co,Fe)AsS orth 24 6.64 28.39 5.64 Glaucophane I Na 2 Mg 3 Al 2 [Si 8 O 22 ](OH) 2 monocl tremolite 2 9.748 17.915 5.273 102.78° Glaucophane II Na 2 Mg 3 Al 2 [Si 8 O 22 ](OH) 2 monocl tremolite 2 9.663 17.696 5.277 103.67° Goethite FeO(OH) orth 4 4.596 9.957 3.021 Gold Au cubic face-centered cubic 4 4.0786 Goldmanite Ca 3 V 2 Si 3 O 12 cubic garnet 8 12.070 Goslarite ZnSO 4 ·7H 2 O orth epsomite 4 11.779 12.050 6.822 4-150 Crystallographic Data on Minerals Section4.indb 150 5/2/05 9:25:44 AM Name Formula Crystal system Structure type Z a/Å b/Å c/Å α β γ Graphite C hex graphite 4 2.4612 6.7079 Greenockite CdS hex zincite 2 4.1354 6.7120 Greigite Fe 3 S 4 cubic spinel 8 9.876 Grossularite Ca 3 Al 2 Si 3 O 12 cubic garnet 8 11.851 Grunerite Fe 7 [Si 8 O 22 ](OH) 2 monocl tremolite 2 9.572 18.44 5.342 101.77° Gudmundite FeSbS monocl 8 10.00 5.93 6.73 90.00° Gypsum CaSO 4 ·2H 2 O monocl 4 5.68 15.18 6.29 113.83° Hafnia HfO 2 monocl baddeleyite 4 5.1156 5.1722 5.2948 99.18° Halite NaCl cubic rock salt 4 5.6402 Hambergite Be 2 (OH,F)BO 3 orth 8 9.755 12.201 4.426 Hardystonite Ca 2 ZnSi 2 O 7 tetr melilite 2 7.87 5.01 Hauerite MnS 2 cubic pyrite 4 6.1014 Hausmannite Mn 3 O 4 tetr 8 8.136 9.422 Hawleyite CdS cubic sphalerite 4 5.833 Heazelwoodite Ni 3 S 2 rhomb 3 5.746 7.134 Hedenbergite CaFe(SiO 3 ) 2 monocl diopside 4 9.854 9.024 5.263 104.23° Hematite Fe 2 O 3 rhomb corundum 6 5.025 13.735 Hemimorphite Zn 4 (OH) 2 Si 2 O 7 ·H 2 O orth 2 8.370 10.719 5.120 Hercynite Fe(AlO 2 ) 2 cubic spinel 8 8.150 Herzenbergite SnS orth germanium sulfide 4 4.328 11.190 3.978 Hessite Ag 2 Te monocl 4 8.13 4.48 8.09 111.9° Hexahydrite MgSO 4 ·6H 2 O monocl 8 10.110 7.212 24.41 98.30° High albite (Analbite) NaAlSi 3 O 8 tricl 4 8.160 12.870 7.106 93.54° 116.36° 90.19° High argentite Ag 2 S cubic 4 6.269 High bornite Cu 5 FeS 4 cubic 1 5.50 High carnegeite NaAlSiO 4 cubic 4 7.325 High chalcocite Cu 2 S hex 2 3.961 6.722 High clinoenstatite MgSiO 3 tricl 8 10.000 8.934 5.170 88.27° 70.03° 91.01° High digenite Cu 2 S cubic 4 5.725 High germania GeO 2 hex α−quartz 3 4.987 5.652 High leucite KAlSi 2 O 6 cubic 16 13.43 High naumanite Ag 2 Se cubic 2 4.993 High sanidine KAlSi 3 O 8 monocl 4 8.615 13.031 7.177 115.98° Huebnerite MnWO 4 monocl wolframite 2 4.834 5.758 4.999 91.18° Huntite Mg 3 Ca(CO 3 ) 4 rhomb calcite 3 9.498 7.816 Hydroxylapatite Ca 5 (PO 4 ) 3 OH hex apatite 2 9.418 6.883 Ice H 2 O hex 4 4.5212 7.3666 Ilmenite FeTiO 3 rhomb ilmenite 6 5.093 14.055 Indialite (Cordierite) Mg 2 Al 3 (AlSi 5 O 18 ) hex beryl 2 9.7698 9.3517 Iodargyrite AgI hex zincite 2 4.5955 7.5005 Iron (α) Fe cubic body- centered cubic 2 2.8664 Jacobsite MnFe 2 O 4 cubic spinel 8 8.499 Jadeite NaAl(SiO 3 ) 2 monocl diopside 4 9.409 8.564 5.220 107.50° Jalpaite Ag 1.55 Cu 0.45 S tetr 16 8.673 11.756 Johannsenite CaMn(SiO 3 ) 2 monocl diopside 4 9.83 9.04 5.27 105.00° Kaliophilite KAlSiO 4 hex 54 26.930 8.522 Kalsilite KAlSiO 4 hex 2 5.1597 8.7032 Kaolinite Al 2 Si 2 O 5 (OH) 4 tricl 2 5.155 8.959 7.407 91.68° 104.87° 89.93° Karelianite V 2 O 3 rhomb corundum 6 4.952 14.002 Keatite SiO 2 tetr 12 7.456 8.604 Kernite Na 2 B 4 O 7 ·4H 2 O monocl 4 7.022 9.151 15.676 108.83° Kerschsteinite CaFeSiO 4 orth olivine 4 4.886 11.146 6.434 Klockmannite CuSe hex deformed covellite 78 14.206 17.25 Knebelite MnFeSiO 4 orth olivine 4 4.854 10.602 6.162 Kyanite Al 2 OSiO 4 tricl 4 7.123 7.848 5.564 89.92° 101.25° 105.97° Larnite Ca 2 SiO 4 monocl 4 5.48 6.76 9.28 94.55° Laurite RuS 2 cubic pyrite 4 5.60 Crystallographic Data on Minerals 4-151 Section4.indb 151 5/2/05 9:25:46 AM Name Formula Crystal system Structure type Z a/Å b/Å c/Å α β γ Lawrencite FeCl 2 rhomb 3 3.593 17.58 Lawsonite CaAl 2 Si 2 O 7 (OH) 2 ·H 2 O orth 4 8.787 5.836 13.123 Lead Pb cubic face-centered cubic 4 4.9505 Leonhardtite MgSO 4 ·4H 2 O monocl 4 5.922 13.604 7.905 90.85° Lepidocrocite FeO(OH) orth 4 3.868 12.525 3.066 Lepidolite K 2 Al 3 Li 2 AlSi 7 O 20 (OH) 4 monocl 2M2 mica 2 9.2 5.3 20.0 98.00° Leucite KAlSi 2 O 6 tetr 16 13.074 13.738 Lime CaO cubic rock salt 4 4.8108 Lime olivine Ca 2 SiO 4 orth olivine 4 5.091 11.371 6.782 Linnaeite Co 3 S 4 cubic spinel 8 9.401 Litharge PbO tetr 2 3.9759 5.023 Loellingite FeAs 2 orth marcasite 2 5.300 5.981 2.882 Low albite NaAlSi 3 O 8 tricl 4 8.139 12.788 7.160 94.27° 116.57° 87.68° Low bornite Cu 5 FeS 4 tetr 16 10.94 21.88 Low cordierite Mg 2 Al 3 (AlSi 5 O 18 ) orth 4 9.721 17.062 9.339 Low germania GeO 2 tetr rutile 2 4.3963 2.8626 Low nepheline NaAlSiO 4 hex 8 9.986 8.330 Luzonite Cu 3 AsS 4 tetr 2 5.289 10.440 Mackinawite FeS tetr 2 3.675 5.030 Magnesioriebeckite Na 2 Mg 3 Fe 2 [Si 8 O 22 ](OH) 2 monocl tremolite 2 9.733 17.946 5.299 103.30° Magnesite MgCO 3 rhomb calcite 6 4.6330 15.016 Magnetite Fe 3 O 4 cubic spinel 8 8.3940 Malachite Cu 2 (OH) 2 CO 3 monocl 4 9.502 11.974 3.240 98.75° Maldonite Au 2 Bi cubic 8 7.958 Manganese sulfide (γ) MnS hex zincite 2 3.976 6.432 Manganese sulfide (β) MnS cubic sphalerite 4 5.611 Manganosite MnO cubic rock salt 4 4.4448 Marcasite FeS 2 orth marcasite 2 4.443 5.423 3.3876 Margarite CaAl 2 [AlSi 2 O 10 ](OH) 2 monocl 2M mica 4 5.13 8.92 19.50 95.00° Marialite Na 4 Al 3 Si 9 O 24 Cl tetr 2 12.064 7.514 Marshite CuI cubic sphalerite 4 6.0507 Mascagnite (NH 4 ) 2 SO 4 orth arcanite 4 7.782 5.993 10.636 Massicot PbO orth 4 5.489 4.755 5.891 Matlockite PbClF tetr 2 4.106 7.23 Maucherite Ni 11 As 8 tetr 4 6.870 21.81 Meionite Ca 4 Al 6 Si 6 O 24 CO 3 tetr 2 12.174 7.652 Melanophlogite SiO 2 cubic clathrate type 46 13.402 Melanterite FeSO 4 ·7H 2 O monocl 4 14.072 6.503 11.041 105.57° Melonite NiTe 2 hex cadmium iodide 1 3.869 5.308 Metacinnabar HgS cubic sphalerite 4 5.8517 Miargyrite AgSbS 2 monocl 8 12.862 4.111 13.220 98.63° Microcline KAlSi 3 O 8 tricl 4 8.582 12.964 7.222 90.62° 115.92° 87.68° Miersite AgI cubic sphalerite 4 6.4963 Millerite NiS rhomb 9 9.616 3.152 Minium Pb 3 O 4 tetr 4 8.815 6.565 Minnesotaite Fe 3 Si 4 O 10 (OH) 2 monocl 4 5.4 9.42 19.4 100.00° Mirabilite Na 2 SO 4 ·10H 2 O monocl 4 11.51 10.38 12.83 107.75° Mn-Indialite Mn 2 Al 3 (AlSi 5 O 18 ) hex beryl 2 9.925 9.297 Molybdenite MoS 2 hex molybdenite 2 3.1604 12.295 Molybdenum Mo cubic 2 3.1653 Molybdite MoO 3 orth 4 3.962 13.858 3.697 Monteponite CdO cubic rock salt 4 4.6953 Monticellite CaMgSiO 4 orth olivine 4 4.827 11.084 6.376 Montroydite HgO orth 4 6.608 5.518 3.519 Mullite (2:1) 2Al 2 O 3 ·SiO 2 orth 6 7.5788 7.6909 2.8883 Mullite (3:2) 3Al 2 O 3 ·2SiO 2 orth 3 7.557 7.6876 2.8842 Muscovite KAl 2 AlSi 3 O 10 (OH) 2 monocl 2M2 mica 4 5.203 8.995 20.030 94.47° 4-152 Crystallographic Data on Minerals Section4.indb 152 5/2/05 9:25:48 AM Name Formula Crystal system Structure type Z a/Å b/Å c/Å α β γ Nacrite Al 2 Si 2 O 5 (OH) 4 monocl 4 8.909 5.146 15.697 113.70° Nantokite CuCl cubic sphalerite 4 5.416 Natroalunite NaAl 3 (SO 4 ) 2 (OH) 6 rhomb 3 6.974 16.69 Natrolite Na 2 Al 2 Si 3 O 10 ·2H 2 O orth 8 18.30 18.63 6.60 Neighborite NaMgF 3 orth perovskite 4 5.363 7.676 5.503 Ni-Skutterudite NiAs 2.95 cubic 8 8.3300 Niccolite NiAs hex niccolite 2 3.618 5.034 Nickel Ni cubic face-centered cubic 4 3.5238 Nickel carbonate NiCO 3 rhomb calcite 6 4.5975 14.723 Nickel olivine Ni 2 SiO 4 orth olivine 4 4.727 10.121 5.915 Nickel selenide NiSe 2 cubic pyrite 4 5.9604 Niter KNO 3 orth aragonite 4 6.431 9.164 5.414 Norsethite BaMg(CO 3 ) 2 rhomb calcite 3 5.020 16.75 Oldhamite CaS cubic rock salt 4 5.689 Orpiment As 2 S 3 monocl 4 11.49 9.59 4.25 90.45° Orthoclase KAlSi 3 O 8 monocl 4 8.562 12.996 7.193 116.02° Orthoferrosilite FeSiO 3 orth enstatite 16 9.080 18.431 5.238 Otavite CdCO 3 rhomb calcite 6 4.9204 16.298 Paracelsian BaAl 2 Si 2 O 8 monocl 4 8.58 9.583 9.08 90.00° Paragonite NaAl 2 AlSi 3 O 10 (OH) 2 monocl 2M1 mica 4 5.13 8.89 19.32 95.17° Pararammelsbergite NiAs 2 orth 8 5.75 5.82 11.428 Paratellurite TeO 2 tetr 4 4.810 7.613 Parawollastonite CaSiO 3 monocl 12 15.417 7.321 7.066 95.40° Pectolite Ca 2 NaH(SiO 3 ) 3 tricl 2 7.99 7.04 7.02 90.05° 95.27° 102.47° Pentlandite Fe 5.25 Ni 3.75 S 8 cubic 4 10.196 Pentlandite Fe 4.75 Ni 5.25 S 8 cubic 4 10.095 Periclase MgO cubic rock salt 4 4.2117 Perovskite CaTiO 3 orth perovskite 4 5.3670 7.6438 5.4439 Petalite LiAlSi 4 O 10 monocl 2 11.32 5.14 7.62 105.90° Petzite Ag 3 AuTe 2 cubic 8 10.38 Phenacite Be 2 SiO 4 rhomb phenacite 18 12.472 8.252 Phlogopite KMg 3 AlSi 3 O 10 (OH) 2 monocl 1M mica 2 5.326 9.210 10.311 100.17° Picrochromite MgCr 2 O 4 cubic spinel 8 8.333 Piemontite Ca 2 Al 1.5 Mn 1.5 (SiO 4 ) 3 OH monocl 2 8.95 5.70 9.41 115.70° Platinum Pt cubic face-centered cubic 4 3.9231 Polymidite Ni 3 S 4 cubic spinel 8 9.480 Portlandite Ca(OH) 2 hex cadmium iodide 1 3.5933 4.9086 Powellite CaMoO 4 tetr scheelite 4 5.226 11.43 Protoenstatite MgSiO 3 orth 8 9.25 8.74 5.32 Proustite Ag 3 AsS 3 rhomb 6 10.816 8.6948 Pseudowollastonite CaSiO 3 tricl 24 6.90 11.78 19.65 90.00° 90.80° 90.00° Pyrargyrite Ag 3 SbS 3 rhomb 6 11.052 8.7177 Pyrite FeS 2 cubic pyrite 4 5.4175 Pyrolusite MnO 2 tetr rutile 2 4.388 2.865 Pyrope Mg 3 Al 2 Si 3 O 12 cubic garnet 8 11.459 Pyrophanite MnTiO 3 rhomb ilmenite 6 5.155 14.18 Pyrophyllite Al 2 Si 4 O 10 (OH) 2 monocl 2M1 mica 4 5.14 8.90 18.55 99.92° Pyroxmangite MnFe(SiO 3 ) 2 tricl 7 7.56 17.45 6.67 84.00° 94.30° 113.70° Pyrrhotite Fe 0.980 S hex defect niccolite 2 3.446 5.848 Pyrrhotite Fe 0.885 S hex defect niccolite 2 3.440 5.709 Quartz (α) SiO 2 hex 3 4.9136 5.4051 Quartz (β) SiO 2 hex 3 4.999 5.4592 Rammelsbergite NiAs 2 orth marcasite 2 4.757 5.797 3.542 Realgar AsS monocl 16 9.29 13.53 6.57 106.55° Retgersite NiSO 4 ·4H 2 O tetr 4 6.782 18.28 Rhodochrosite MnCO 3 rhomb calcite 6 4.7771 15.664 Crystallographic Data on Minerals 4-153 Section4.ind