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Formula: FeBi2S4
Valence: Fe2+Bi3+2S2-4
Sulphosalt of ferrous iron, bismuth
and sulphur,
pavonite homologous series group
Crystal system: Monoclinic
Specific gravity: 6.13 calculated
Colour: Bluish grey to light grey
Environments
Sunshuite is a new mineral, approved in 2025 and to date (October 2026) reported only from the type locality.
Localities
At the type locality, Chaganbulagen Ag-Pb-Zn deposit, Jiawula Ag-polymetallic ore field, New Barag Right Banner,
Hulunbuir City, Inner Mongolia, China, sunshuite was discovered in the epithermal ore field. It occurs as
anhedral grains, 5 to 20 μm in size, in association with pyrrhotite,
sphalerite, galena,
chalcopyrite, native bismuth,
bismuthinite, quartz,
calcite, chlorite and
sericite.
The Fe in sunshuite is divalent (Fe2+), and its association with
pyrrhotite and
native bismuth suggests that sunshuite has the potential to serve
as an indicator of a reducing hydrothermal environment
(AM 111.10.1665-1674).
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