Xingzhongite
An opaque metallic lead-iridium-iron sulfide from China.
Intro adapted from Wikipedia (CC BY-SA).
Xingzhongite is an IMA-recognized mineral species in the sulfide class, with the chemical formula Pb²⁺Ir³⁺₂S₄.
It crystallizes in the cubic crystal system. It is a member of the Spinel structural group.
Key properties: specific gravity 7.94; Metallic. R: (466) 40.5, (544) 38.9, (589) 41.1, (656) 41.0 luster.
IMA symbol Xin, IMA status: questionable, named in 1976.
Found in dunite-hosted platinum ores, related to chromium mineralization (China).
It is found associated with Pt–Fe alloy, osmiridium, iridosmine, osmium, iridium, erlichmanite, cooperite, irarsite, osarsite, chromite, magnetite, pyrite, olivine, serpentine.
Presumably for the undefined Chinese type locality.