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Formula: Ca2Mn2+(AsO4)2.2H2O
Hydrated normal arsenate,
fairfieldite group,
manganese-bearing mineral
Crystal System: Triclinic
Specific gravity: 3.55 measured, 3.60 calculated
Hardness: 3 to 4
Streak: White
Colour: Colourless
Luminescence: No fluorescence under UV
Environments:
Localities
At the type locality, the Sterling mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA,
parabrandtite forms aggregates, 0.5 to 1.5 mm across, of colurless crystals in parallel growth, associated with
sarkinite in a cavity in a vein in
primary ore consisting of
franklinite, pink calcite and red
willemite
(AM 73.1496).
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