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Pyromorphite VII - Phosphates

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Name		Pyromorphite (Green Lead Ore)
Chemistry		Pb5[Cl|(PO4)3]
Hardness		3.5 - 4
Lustre		adamantine, resinous
Colour		green, brown, yellow, orange, grey, colourless, translucent
Streak		white
Density [g/cm3]		6.7 - 7.0
Crystal habit		orthorhombic, crystals prismatic, often barrel shaped
Cleavage, Fracture		[1011] imperfect, fracture conchoidal to uneven
other characteristics and occurrences		secondary mineral formation in the oxidation zone of the iron hut (gossan) of lead ore deposits

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst

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