Fluckite

minerals

pharmacolite

picropharmacolite

arsenic

Images
Formula: CaMn2+(AsO3OH)2.2H2O
Hydrated acid arsenate, manganese-bearing mineral
Specific gravity: 3.05
Hardness: 3½ to 4
Streak: White
Colour: Colourless, pale pink, pale rose red
Environments

Hydrothermal environments

Pharmacolite and picropharmacolite are common associates of fluckite (Mindat).

Localities

The type locality is the Gabe Gottes mine, Sankt Jakob vein, Neuenberg, Ste Marie-aux-Mines, Colmar-Ribeauvillé, Haut-Rhin, Grand Est, France. Fluckite was found here as a post-mine low-temperature reaction product of carbonate gangue with arsenical solutions derived from arsenic (AM 65.1066, HOM). Associated minerals include arsenic, tennantite, skutterudite, sainfeldite, pharmacolite, villyaellenite, picropharmacolite, calcite, dolomite, ankerite and quartz (HOM).

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