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Formula: Bi3O(PO4)2(OH)
Anhydrous phosphate containing hydroxyl, preisingerite group,
forms series with preisingerite and with
schumacherite,
bismuth-bearing mineral
Crystal System: Triclinic
Specific gravity: 6.99 calculated
Hardness: 4½
Streak: White
Colour: White to pale pink or yellow, also dark brown
Solubility: Soluble in dilute hydrochloric acid
Common impurities: Pb,V,As
Environments
Localities
At the type locality, Bergweg, Gadernheim, Lautertal, Bergstraße, Darmstadt, Hesse, Germany, petitjeanite occurs
as a secondary mineral in spherical aggregates or crusts of
intergrown crystals to 0.2 m in silicified baryte veins. Associated minerals
include bismutite, mixite,
reichenbachite,
pyromorphite and malachite
(AM 79.764-765).
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