Linnaeite
Linnaeite | |
---|---|
Linnaeite samples and polished section | |
General | |
Category |
Sulfide mineral Thiospinel group Spinel structural group |
Formula (repeating unit) | Co+2Co+32S4 |
Strunz classification | 02.DA.05 |
Crystal system | Cubic |
Unit cell | a = 9.43 Å; Z=8 |
Identification | |
Color | Steel gray to gray violet |
Crystal habit | As octahedral crystals; massive, granular |
Crystal symmetry |
Isometric hexoctahedral H-M symbol: (4/m32/m) Space group: F d3m |
Twinning | On {111} |
Cleavage | Imperfect on {001} |
Fracture | Subconchoidal |
Mohs scale hardness | 4.5-5.5 |
Luster | Metallic |
Streak | Grayish-black |
Diaphaneity | Opaque |
Specific gravity | 4.8-5.8 |
Alters to | Tarnishes in air |
References | [1][2][3] |
Linnaeite is a cobalt sulfide mineral with the composition Co+2Co+32S4. It was discovered in 1845 in Västmanland, Sweden, and was named to honor Carl Linnaeus (1707–1778).[1]
Linnaeite forms a series with polydymite, Ni+2Ni+32S4.[4] Linnaeite is found in hydrothermal veins with other cobalt and nickel sulfides in many localities around the world.[3]
References
- Schumann, Walter (1991). Mineralien aus aller Welt. BLV Bestimmungsbuch (2 ed.). p. 223. ISBN 3-405-14003-X.
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