Chengdeite
Chengdeite is an IMA-recognized mineral species in the native element class, with the chemical formula Ir₃Fe.
It crystallizes in the cubic crystal system (space group Pm3m). It is a member of the Perovskite, Auricupride structural group.
Key properties: Mohs hardness 5; specific gravity 19.19; Black streak; Metallic luster.
IMA symbol Cgd, IMA status: approved, named in 1994.
Found in chromite ores in ultramafic rocks and in placer concentrates derived therefrom.
It is found associated with Inaglyite, osmiridium, ferrian platinum, laurite, irarsite, isoferroplatinum, erlichmannite, gaotaiite, galena, gold, chromite, magnetite.
The name refers to Chengde Co., China, in which it was found to occur.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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