Cuprospinel
An inverse spinel of copper and iron — magnetite's structure with copper occupying cation sites.
Intro adapted from Wikipedia (CC BY-SA).
Cuprospinel is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Cu²⁺Fe³⁺₂O₄.
It crystallizes in the cubic crystal system (space group Fd3m). It is a member of the Spinel structural group.
Key properties: specific gravity 5.25; Black streak.
IMA symbol Cspl, IMA status: approved, named in 1971.
Found in highly oxidized material, once spontaneously ignited, in an ore dump.
It is found associated with Pyrite, chalcopyrite, sphalerite, pyrrhotite, hematite.
The name refers to the mineral’s copper, CUPRum, content and having the spinel structure.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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