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Formula: Pb5(PO4)
Phosphate, apatite group,
apatite supergroup
Crystal System: Hexagonal
Specific gravity: 7.32 calculated for the measured composition
Hardness: 3½ to 4
Streak: White
Colour: Colourless
Luminescence: No fluorescence under UV
Environments
Sedimentary environments
Metamorphic environments
Hydroxylpyromorphite is a relatively new mineral, approved in 2017.
Localities
At the type locality, Copps Mine, Marenisco, Gogebic iron range, Gogebic County, Michigan, USA,
hydroxylpyromorphite occurs as aggregates of randomly oriented hexagonal prisms, primarily between about
20–35 μm in length and 6–10 μm in diameter. The formation is mainly composed of
metagraywacke and
conglomeratic, ferruginous
quartzite. Associated minerals include
lazaraskeite, chrysocolla,
muscovite, orthoclase,
calcite and quartz
(Mindat).
Hydroxylpyromorphite from Copps Mine -
Image
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