Talnakhite is a mineral of chalcopyrite group with formula: Cu9(Fe, Ni)8S16.

[2] 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.

[4][5] 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.

This article about a specific sulfide mineral is a stub.