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Formula: Pb2Fe3+(PO4)(PO3OH)(OH)2
Anhydrous phosphate, drugmanite subgroup,
herderite group,
gadolinite supergroup,
lead-bearing mineral
Crystal System: Monoclinic
Specific gravity:
Hardness: 5 to 6
Streak: White
Colour: Pale yellow
Solubility: Soluble in warm nitric acid
Common impurities: Al
Environments
Sedimentary environments
Hydrothermal environments
Localities
At the type locality, Richelle, Visé, Liège, Wallonia, Belgium, drugmanite is a very rare mineral, formed at low
temperatures in vugs in mineralised limestones, an oxidation product
of disseminated sulphides. Associated minerals include anglesite,
corkite, pyromorphite and
phosphosiderite
(HOM).
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