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Willemseite Mineral Data + |
General Willemseite Information |
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| (Ni,Mg)3Si4O10(OH)2 | |||
| Molecular Weight = 456.63 gm | |||
| Magnesium 3.99 % Mg 6.62 % MgO | |||
| Silicon 24.60 % Si 52.63 % SiO2 | |||
| Nickel 28.92 % Ni 36.80 % NiO | |||
| Hydrogen 0.44 % H 3.95 % H2O | |||
| Oxygen 42.05 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Ni2.25Mg0.75Si4O10(OH)2 | |||
| Approved IMA 1970 | |||
| Link to MinDat.org Location Data. | |||
Willemseite Image | |||
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Willemseite Crystallography |
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| a:b:c =0.581:1:2.076 | |||
| a = 5.316, b = 9.149, c = 18.994, Z = 4; beta = 99.96° V = 909.87 Den(Calc)= 3.33 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c | |||
| By Intensity(I/Io): 9.4(1), 3.12(0.28), 2.503(0.23), | |||
Physical Properties of Willemseite |
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| [001] Perfect | |||
| Light green. | |||
| 3.31 | |||
| 2 - Gypsum | |||
| greenish white | |||
Optical Properties of Willemseite |
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| CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1909,KPDmeas= 0.192,KC= 0.2009 |
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| Biaxial (-), a=1.6, b=1.652, g=1.655, bire=0.0550, 2V(Calc)=26, 2V(Meas)=27. | |||
Calculated Properties of Willemseite |
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relectron=3.28 gm/cc |
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| Fermion Index = 0.01895 Boson Index = 0.98105 |
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PEWillemseite = 12.39 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Willemseite is Not Radioactive |
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Willemseite Classification |
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| 71.2.1.4 (71)Phyllosilicate Sheets of Six-Membered Rings | |||
| (71.2)with 2:1 Layers | |||
| (71.2.1)Pyrophyllite-talc group | |||
| VIII/H.09-60 VIII - Silicates | |||
| VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups | |||
| VIII/H.09 - Talc series | |||
Other Willemseite Information |
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| PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |||
| Links to other databases for Willemseite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Willemseite using: Visit our Advertisers for Willemseite : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Willemseite Mineral Data : Ask about Willemseite here : Print or Cut-and-Paste your Willemseite Specimen Label here :
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