linnaeite

{{Infobox mineral | name = Linnaeite | boxwidth = | boxbgcolor = | image = Linnaeite - USGS Mineral Specimens 722.jpg | imagesize = | alt = | caption = Linnaeite samples and polished section | category = Sulfide mineral Thiospinel group Spinel structural group | formula = Co+2Co+32S4 | IMAsymbol = Lin | molweight = | strunz = 2.DA.05 | dana = | system = Cubic | class = Hexoctahedral (mm) H-M symbol: (4/m 2/m) | symmetry = Fdm | unit cell = a = 9.43 Å; Z = 8 | color = Steel gray to gray violet | colour = | habit = As octahedral crystals; massive, granular | twinning = On {111} | cleavage = Imperfect on {001} | fracture = Subconchoidal | tenacity = | mohs = 4.5–5.5 | luster = Metallic | streak = Grayish-black | diaphaneity = Opaque | gravity = 4.8–5.8 | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = Tarnishes in air | other = | prop1 = | prop1text = | references = }}

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).