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Formula: Pb4CuZn2(AsO4)2(PO4)2(OH)2
Arsenate-phosphate,
dongchuanite group
Crystal System: Triclinic
Specific gravity: 5.91 calculated
Hardness: 2½ to 3
Colour: Apple-green to greenish blue
Environments
Cuprozheshengite is a new mineral, approved in 2021 and to date (September 2024) reported only from the
type localities.
Localities
There are two co-type localities, the Laochang ore field (Laochang Mine), Gejiu Sn-polymetallic ore field, Gejiu
City, Honghe, Yunnan, China, and the Dongchuan Cu Mine, Sanguozhuang, Dongchuan District, Kunming, also in Yunnan,
China.
At the type localities cuprozheshengite occurs as sub-millimeter greenish-blue hemispherical aggregates of
microscopic blade-like crystals on hemimorphite and is closely
associated with veszelyite and
galena
(AM 109.7.1248-1257).
The cuprozheshengite hemispheres are typically 0.3 to 1 mm in diameter and blades have lengths up to
0.2 mm but widths of only 10 to 50 μm. Cuprozheshengite occurs as a
supergene mineral in fractures from
copper sulphides along a regional redox boundary. Associated minerals include
theisite, as well as
hemimorphite,
veszelyite and
galena
(Mindat)>/i>.
Cuprozheshengite from Sanguozhuang -
Image
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