Liudongshengite

liudongshengite

rosasite

chrysocolla

fornacite

Images

Formula: Zn₄Cr₂(OH)₁₂(CO₃).3H₂O
Carbonate, fougèrite group, chromium-bearing mineral
Crystal System: Trigonal
Specific gravity: 2.95 measured, 3.00 calculated
Hardness: 1½
Streak: White
Colour: Pinkish
Environments

Hydrothermal environments

Liudongshengite is a relatively new mineral, approved in 2019, and to date (March 2022) reported only from The type locality.

Localities

At the type locality, the 79 Mine, Chilito, Hayden area, Banner Mining District, Gila County, Arizona, USA, liudongshengite occurs as micaceous aggregates or hexagonal platy crystals up to 0.10 × 0.10 × 0.01 mm, on the 4th level of the lead-zinc mine in an area rich in cerussite and wulfenite. It was found in a narrow, highly oxidised quartz-sulphide vein along a steeply dipping fault where the original sulphide minerals have been almost entirely replaced by secondary minerals. The liudongshengite occurs on cerussite occupying voids left by altered galena crystals. Other minerals commonly found in these voids include malachite, rosasite, hemimorphite, chrysocolla, mimetite, wulfenite and fornacite. Scheelite, stolzite, galena, and rarely linarite and kuksite also occur in the quartz vein (CM 59.763-769).

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