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Formula: Pb(CrO4)
Anhydrous chromate
Crystal System: Monoclinic
Specific gravity: 5.97 to 6.02 measured, 5.97 calculated
Hardness: 2½； to 3
Streak: Orange
Colour: Red to orange
Not fluorescent in UV.
Solubility: Slightly soluble in hydrochloric, sulphuric and nitric acid
Common impurities: Zn,S
Environments:
Crocoite is an uncommon secondary mineral found in the
oxidation zone of
high temperature lead deposits in those regions where
lead veins have
traversed rocks containing chromite. Associated minerals include
pyromorphite,
cerussite,
wulfenite, phoenicochroite,
vauquelinite, embreyite,
dundasite, vanadinite,
descloizite, anglesite,
quartz and limonite
(HOM).
Localities
The type locality is the Tsvetnoi Mine, Uspenskaya Hill, Berezovsk deposit, Beryozovsky, Sverdlovsk Oblast, Russia.
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