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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
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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