Wilkmanite Mineral Data + 
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- 2.10.2.1 Wilkmanite Ni3Se4 I2/m 2/m
- 2.10.2.2 Brezinaite Cr3S4 I2/m 2/m
- 2.10.2.3 Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/m 2/m
- II/D.05-10 Brezinaite Cr3S4 I2/m 2/m
- II/D.05-20 Wilkmanite Ni3Se4 I2/m 2/m
General Wilkmanite Information |
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 Chemical Formula: |
Ni3Se4 | ||
| Composition: |
Molecular Weight = 491.91 gm | ||
| Nickel 35.79 % Ni | |||
| Selenium 64.21 % Se | |||
| ______ | |||
| 100.00 % | |||
| Empirical Formula: |
Ni3Se4 | ||
| Environment: |
As a primary phase and as and alteration product of sederholmite, in albite diabase sills that cut a schist formation, associated with low-grade uranium mineralization. Dimorphous w ith trustedtite. | ||
| IMA Status: |
Approved IMA 1964 | ||
| Locality: |
Kuusamo, northeastern Finland. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for W. W. Wilkman, geologist. | ||
| Synonym: |
ICSD 42558 | ||
| PDF 18-890 | |||
Search for Wilkmanite Images | |||
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Images:
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Wilkmanite Crystallography |
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| Axial Ratios: |
a:b:c =1.7134:1:2.898 | ||
| Cell Dimensions: |
a = 6.22, b = 3.63, c = 10.52, Z = 2; beta = 90.53° V = 237.52 Den(Calc)= 6.88 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 1.8(1), 2.02(1), 2.7(1), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Wilkmanite |
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| Cleavage: |
[001] Good | ||
| Color: |
Grayish yellow. | ||
| Diaphaniety: |
Opaque | ||
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. | ||
| Hardness: |
2.5 - Finger Nail | ||
| Luster: |
Metallic | ||
Optical Properties of Wilkmanite |
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| RL Anisotrophism: |
Strong, pink to yellowish green. | ||
| RL Color: |
Pale pinkish yellow. | ||
| RL Pleochroism: |
Distinct, pale yellow to grayish white. | ||
Calculated Properties of Wilkmanite |
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| Electron Density: |
relectron=6.15 gm/cc |
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| Fermion Index |
Fermion Index = 0.05284 Boson Index = 0.94716 |
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| Photoelectric: |
PEWilkmanite = 65.87 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Wilkmanite is Not Radioactive |
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Wilkmanite Classification |
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| Dana Class: |
2.10.2.1 (2)Sulfides - Including Selenides and Tellurides | ||
| (2.10)where Am Bn Xp, with (m+n):p=3:4 | |||
| (2.10.2)Dana Group | |||
| Strunz Class: |
II/D.05-20 II - Sulfides and sulphosalts | ||
| II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold | |||
| II/D.05 - Bretzinaite ? series | |||
Other Wilkmanite Information |
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) | ||
| See Also: |
Links to other databases for Wilkmanite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Wilkmanite using: Visit our Advertisers for Wilkmanite : Translate Wilkmanite Mineral Data : Ask about Wilkmanite here : Print or Cut-and-Paste your Wilkmanite Specimen Label here :
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