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Linnaeite

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Cobalt sulfide mineral
Linnaeite
Linnaeite samples and polished section
General
CategorySulfide mineral
Thiospinel group
Spinel structural group
Formula
(repeating unit)		CoCo2S4
IMA symbolLin
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

Linnaeite is a cobalt sulfide mineral with the composition CoCo2S4. It was discovered in 1845 in Västmanland, Sweden, and was named to honor Carl Linnaeus (1707–1778).

Linnaeite forms a series with polydymite, NiNi2S4. Linnaeite is found in hydrothermal veins with other cobalt and nickel sulfides in many localities around the world.

References

  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. ^ Linnaeite on Mindat
  3. Linnaeite data on Webmineral
  4. ^ 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.
Carl Linnaeus
Published works
General
Apostles of Linnaeus
Related people
Recognitions


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