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Wilkmanite

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Formula:
Ni
 
3
Se
 
4
System:MonoclinicColour:Yellow-gray
Hardness:2½
Name:Named after Wanold Wrydon Wilkman (1872-1937), Finnish geologist.
This page provides mineralogical data about Wilkmanite.

Classification of Wilkmanite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:2/D.05-20
Nickel-Strunz 10th (pending) edition ID:2.D0.15

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
0 :
Dana 8th edition ID:2.10.2.1

2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
Hey's CIM Ref.:3.11.17

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
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Type Occurrence of Wilkmanite

Type Locality:Kuusamo, Northern Finland Region, Finland
Year of Discovery:1964

Physical Properties of Wilkmanite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Yellow-gray
Hardness (Mohs):2½

Crystallography of Wilkmanite

Crystal System:Monoclinic
Cell Parameters:a = 6.22Å, b = 3.63Å, c = 10.52Å
β = 90.53°
Ratio:a:b:c = 1.713 : 1 : 2.898
Unit Cell Volume:V 237.52 ų (Calculated from Unit Cell)

Chemical Properties of Wilkmanite

Formula:
Ni
 
3
Se
 
4
Essential elements:Ni, Se
All elements listed in formula:Ni, Se
Common Impurities:Co,Cu,Fe

Relationship of Wilkmanite to other Species

Related Minerals - Hey's Index Grouping:

- +
3.11.1Heazlewoodite
Ni
 
3
S
 
2
3.11.2Godlevskite
(Ni,Fe)
 
9
S
 
8
3.11.3Millerite
NiS
3.11.4Polydymite
Ni
2+
 
Ni
3+
2
S
 
4
3.11.5Vaesite
NiS
 
2
3.11.6Shandite
Ni
 
3
Pb
 
2
S
 
2
3.11.7Donharrisite
Ni
 
8
Hg
 
3
S
 
9
3.11.8Violarite
Fe
2+
 
Ni
3+
2
S
 
4
3.11.9Pentlandite
(Fe,Ni)
 
9
S
 
8
3.11.10Bravoite
(Fe,Ni)S
 
2
3.11.11Siegenite
CoNi
 
2
S
 
4
 -NiCo
 
2
S
 
4
3.11.12Fletcherite
Cu(Ni,Co)
 
2
S
 
4
3.11.13Villamaninite
(Cu,Ni,Co,Fe)S
 
2
3.11.14Mäkinenite
γ-NiSe
3.11.15Sederholmite
beta-NiSe
3.11.16Trüstedtite
Ni
 
3
Se
 
4
3.11.18Kullerudite
NiSe
 
2
3.11.19Penroseite
(Ni,Co,Cu)Se
 
2
3.11.20Tyrrellite
Cu(Co
3+
 
,Ni
3+
 
)
 
2
Se
 
4
3.11.21Imgreite
NiTe (?)
3.11.22Melonite
NiTe
 
2
3.11.23Kitkaite
NiTeSe
3.11.24Dienerite
3.11.25Orcelite
Ni
 
5-x
As
 
2
3.11.26Maucherite
Ni
 
11
As
 
8
3.11.27Nickeline
NiAs
3.11.28Rammelsbergite
NiAs
 
2
3.11.29Pararammelsbergite
NiAs
 
2
3.11.30Nickelskutterudite
NiAs
 
2-3
3.11.31Oregonite
Ni
 
2
FeAs
 
2
3.11.32Westerveldite
(Fe,Ni,Co)As
3.11.33Langisite
(Co,Ni)As
3.11.34Gersdorffite
NiAsS
3.11.35Jolliffeite
NiAsSe
3.11.36Breithauptite
NiSb
3.11.38Ullmannite
NiSbS
3.11.39Willyamite
(Co,Ni)SbS

Other Names for Wilkmanite

Other Languages:
German:Wilkmanit
Russian:Вилкманит
Spanish:Wilkmanita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Wilkmanite

Reference List:

- +
Vuorelainen Y., Huhma A., Häkli A. (1964): Sederholmite, wilkmanite, kullerudite, mäkinenite, and trüstedtite, five new nickel selenide minerals. Comptes Rendus de la Société Géologique de Finlande. 36, 113-125


American Mineralogist (1965): 50: 519-520.

Internet Links for Wilkmanite

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    • Localities for Wilkmanite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    Finland
     
    • Northern Finland Region
    		Vuorelainen Y, Huhma A, Häkli A (1964): Sederholmite, wilkmanite, kullerudite, mäkinenite, and trüstedtite, five new nickel selenide minerals. Comptes Rendus de la Société Géologique de Finlande. 36, 113-125 ; Econ Geol (1997) 92:468-484
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