Mineralogy Database

Wilkmanite Mineral Data

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General Wilkmanite Information

Help on Chemical  Formula: Chemical Formula: Ni3Se4
Help on Composition: Composition: Molecular Weight = 491.91 gm
   Nickel    35.79 %  Ni
   Selenium  64.21 %  Se
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ni3Se4
Help on Environment: 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.
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Kuusamo, northeastern Finland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for W. W. Wilkman, geologist.
Help on Name Pronunciation: Name Pronunciation: Wilkmanite + Pronunciation Say WILKMANITE
Help on Synonym: Synonym: ICSD 42558
  PDF 18-890

Wilkmanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7134:1:2.898
Help on Cell Dimensions: Cell Dimensions: a = 6.22, b = 3.63, c = 10.52, Z = 2; beta = 90.53° V = 237.52 Den(Calc)= 6.88
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.8(1), 2.02(1), 2.7(1),

Physical Properties of Wilkmanite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Grayish yellow.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic

Optical Properties of Wilkmanite

Help on RL Anisotrophism: RL Anisotrophism: Strong, pink to yellowish green.
Help on RL Color: RL Color: Pale pinkish yellow.
Help on RL Pleochroism: RL Pleochroism: Distinct, pale yellow to grayish white.

Calculated Properties of Wilkmanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.15 gm/cc
note: Specific Gravity of Wilkmanite =6.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEWilkmanite = 65.87 barns/electron
U=PEWilkmanite x rElectron Density= 405.34 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wilkmanite is Not Radioactive

Wilkmanite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.10)where Am Bn Xp, with (m+n):p=3:4
  (02.10.02)Wilkmanite Group Wilkmanite Ni3Se4 I2/m 2/m Brezinaite Cr3S4 I2/m 2/m Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/m 2/m Kingstonite! (Rh,Ir,Pt)3S4 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.DA.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.D - Metal Sulfides, M:S = 3:4 and 2:3
  02.DA -M:S = 3:4
02.DA.15 Brezinaite Cr3S4 I2/m 2/m
02.DA.15 Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/m 2/m
02.DA.15 Wilkmanite Ni3Se4 I2/m 2/m

Other Wilkmanite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Wilkmanite :
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

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Dana No: Strunz No: 02.DA.15





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