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Putoranite, Talnakhite - Mineralogisches Museum Bonn3.jpg
Talnakhite and putoranite
Category Sulfide mineral
(repeating unit)
Cu9(Fe, Ni)8S16
Strunz classification 2.CB.10b
Crystal system Isometric
Crystal class Hextetrahedral (43m)
H-M symbol: (4 3m)
Space group I4 3m
Color Brass-yellow, tarnishes to pink or brown tints, then iridescent
Luster Metallic
Diaphaneity Opaque

Talnakhite is a mineral of chalcopyrite group with formula: Cu9(Fe, Ni)8S16.[1] It was named after the Talnakh ore deposit, near Norilsk in Western Siberia, Russia where it was discovered as reported in 1963 by I. Budko and E. Kulagov.[2] It was officially named "talnakhite" in 1968.[3][4] Despite the initial announcement it turned out to be not a face centered high-temperature polymorph of chalcopyrite, but to have composition Cu18(Fe, Ni)18S32. At 80 °C (176 °F) to 100 °C (212 °F) it decomposes to tetragonal cubanite plus bornite.[5][6]


  1. ^ Talnakhite: Talnakhite mineral information and data
  2. ^ Ivetta Budko, Eduard Kulagov, "A Natural Cubic Chalcopyrite" (Будько И.А., Кулагов Э.А., "Природный кубический халькопирит"), Докл. АН АН СССР. (1963) vol. 152, no. 2, pp. 408—410.
  3. ^ Будько И. А., Кулагов Э. А. "Новый минерал талнахит — кубическая разновидность халькопирита", Zapiski Vsesoyuznogo Mineraligicheckogo Obshchestva, 1968. ч. 97, вып. 1, с. 63.
  4. ^ "Time to gather stones"(in Russian)
  5. ^ Cabri L.J., Econ.Geol.(1967) 62, 910-925
  6. ^ Michael Fleischner, "New Mineral Names", The American Mineralogist, 1970, vol 55, p. 2135