General Mountkeithite Information![]() (Mg,Ni)11(Fe+++,Cr)3(SO4,CO3)3.5(OH)24•11(H2O) |
![]() Molecular Weight = 1,426.01 gm |
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Magnesium 18.34 % Mg 30.41 % MgO |
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Aluminum 1.34 % Al 2.54 % Al2O3 |
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Chromium 4.01 % Cr 5.86 % Cr2O3 |
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Iron 5.56 % Fe 7.95 % Fe2O3 |
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Copper 0.09 % Cu 0.11 % CuO |
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Nickel 4.61 % Ni 5.87 % NiO |
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Hydrogen 3.28 % H 29.35 % H2O |
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Carbon 1.02 % C 3.73 % CO2 |
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Sulfur 5.67 % S 14.15 % SO3 |
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Oxygen 56.08 % O |
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______ ______ |
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100.00 % 99.98 % = TOTAL OXIDE |
![]() Mg10.76(OH)26.07•10.2(H2O)Ni1.12Cu0.02Fe3+1.42Cr1.1Al0.71(SO4)2.52(CO3)1.21 |
![]() Bleached serpentinite matrix. |
![]() Approved IMA 1981 |
![]() Mount Keith nickel deposit, 400 km nnw of Kalgooolie, WA, Australia. Link to MinDat.org Location Data. |
![]() Named for the locality. |
![]() Mountkeithite + Pronunciation |
![]() | | Mountkeithite Image
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Mountkeithite Crystallography![]() a:c = 1:2.1074 |
![]() a = 10.698, c = 22.545, Z = 2; V = 2,234.53 Den(Calc)= 2.12 |
![]() HexagonalSpace Group: Unk |
![]() By Intensity(I/Io): 11.3(1), 5.63(0.8), 3.765(0.6), |
| Physical Properties of Mountkeithite![]() {0001} Perfect |
![]() White, Light pink. |
![]() 2.12 |
![]() Flakes - Flat, thin crystals or aggregates. |
![]() Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
![]() Rosette - Bundled tabular aggregates resembling rose flower petals. |
![]() 2 - Gypsum |
![]() Pearly |
![]() white |
| Optical Properties of Mountkeithite![]() CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2429,KPDmeas= 0.2429,KC= 0.2514 Ncalc = 1.53 ![]() Uniaxial (-), e=1.51, w=1.52, bire=0.0100. |
| Calculated Properties of Mountkeithite![]() Bulk Density (Electron Density)=2.16 gm/cc |
note: Specific Gravity of Mountkeithite =2.12 gm/cc. ![]() Fermion Index = 0.02 |
Boson Index = 0.98 ![]() PEMountkeithite = 5.12 barns/electron |
U=PEMountkeithite x rElectron Density= 11.08 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Mountkeithite is Not Radioactive | Mountkeithite Classification![]() 32.04.03.01 (32)Compound Sulfates |
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(32.04)(hydrous) with poly-anionic formula |
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(32.04.03)Dana Group |
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![]() 07.DD.35 07 - SULFATES (SELENATES, TELLURATES) |
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07.D - Sulfates (selenates, etc.) with additional anions, with H2O |
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07.DD -With only medium-sized cations; sheets of edge-sharing octahedra |
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| Other Mountkeithite Information![]() NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
![]() Links to other databases for Mountkeithite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Mountkeithite using: Visit our Advertisers for Mountkeithite : A Bijoux Google Search for MountkeithiteAdam's Minerals Google Search for Mountkeithite Cape Minerals Google Search for Mountkeithite Dakota Matrix Minerals Google Search for Mountkeithite Excalibur Mineral Corp. Google Search for Mountkeithite Exceptional Minerals Google Search for Mountkeithite John Betts Fine Minerals Search for Mountkeithite McDougall Minerals Google Search for Mountkeithite Mineral News Website Link Rock and Mineral Shows Google Search for Mountkeithite Weinrich Minerals, Inc. Google Search for Mountkeithite Ask about Mountkeithite here : Print or Cut-and-Paste your Mountkeithite Specimen Label here :
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