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Linnaeite

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Linnaeite
Linnaeite samples and polished section
General
CategorySulfide mineral
Thiospinel group
Spinel structural group
Formula
(repeating unit)
Co+2Co+32S4
IMA symbolLin[1]
Strunz classification2.DA.05
Crystal systemCubic
Crystal classHexoctahedral (m3m)
H-M symbol: (4/m 3 2/m)
Space groupFd3m
Unit cella = 9.43 Å; Z = 8
Identification
ColorSteel gray to gray violet
Crystal habitAs octahedral crystals; massive, granular
TwinningOn {111}
CleavageImperfect on {001}
FractureSubconchoidal
Mohs scale hardness4.5–5.5
LusterMetallic
StreakGrayish-black
DiaphaneityOpaque
Specific gravity4.8–5.8
Alters toTarnishes in air
References[2][3][4]

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).[2]

Linnaeite forms a series with polydymite, Ni+2Ni+32S4.[5] Linnaeite is found in hydrothermal veins with other cobalt and nickel sulfides in many localities around the world.[4]

References

[edit]
  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ a b Linnaeite on Mindat
  3. ^ Linnaeite data on Webmineral
  4. ^ a b Linnaeite on the Handbook of Mineralogy
  5. ^ Linnaeite-Polydymite Series
  • Schumann, Walter (1991). Mineralien aus aller Welt. BLV Bestimmungsbuch (2 ed.). p. 223. ISBN 3-405-14003-X.