Wilkmanite Mineral Data
General Wilkmanite Information
Chemical Formula:
Ni3Se4
Composition:
Molecular Weight = 491.91 gm
Nickel 35.79 % Ni
Selenium 64.21 % Se
______
100.00 %
Empirical Formula:
Ni3 Se4
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.
Name Pronunciation:
Wilkmanite + Pronunciation
Synonym:
ICSD 42558
PDF 18-890
Wilkmanite Crystallography
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 - Prismatic H-M Symbol (2/m) Space Group: I2/m
X Ray Diffraction:
By Intensity(I/Io ): 1.8(1), 2.02(1), 2.7(1),
Physical Properties of Wilkmanite
Cleavage:
{001} Good
Color:
Grayish yellow.
Diaphaneity:
Opaque
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
2.5 - Finger Nail
Luster:
Metallic
Optical Properties of Wilkmanite
RL Anisotrophism:
Strong, pink to yellowish green.
RL Color:
Pale pinkish yellow.
RL Pleochroism:
Distinct, pale yellow to grayish white.
Calculated Properties of Wilkmanite
Electron Density:
Bulk Density (Electron Density)=6.15 gm/cc note: Specific Gravity of Wilkmanite =6.88 gm/cc.
Fermion Index:
Fermion Index = 0.05 Boson Index = 0.95
Photoelectric:
PEWilkmanite = 65.87 barns/electronU=PEWilkmanite x r Electron Density= 405.34 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Wilkmanite is Not Radioactive
Wilkmanite Classification
Dana Class:
02.10.02.01 (02) Sulfides - Including Selenides and Tellurides
(02.10) where Am Bn Xp, with (m+n):p=3:4
(02.10.02) Wilkmanite Group
02.10.02.01 Wilkmanite Ni3Se4 I2/m 2/m
02.10.02.02 Brezinaite Cr3S4 I2/m 2/m
02.10.02.03 Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/m 2/m
02.10.02.04 Kingstonite ! (Rh,Ir,Pt)3S4 C 2/m 2/m
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
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 - 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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Print or Cut-and-Paste your Wilkmanite Specimen Label here :
Wilkmanite
Ni3Se4
Dana No: 02.10.02.01 Strunz No: 02.DA.15
Locality:
Notes:
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