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Mimetite VII - Arsenates

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Name		Mimetite (Campyllite, Mimetesite)
Chemistry		Pb5[Cl|(AsO4)3]
Hardness		3.5 - 4
Lustre		adamantine, resinous
Colour		honey yellow, greenish, grey, colourless, translucent
Streak		white
Density [g/cm3]		7.1
Crystal habit		hexagonal, crystals hexagonal, barrel shaped, pinacoid-pyramidal
Cleavage, Fracture		fracture conchoidal to uneven
other characteristics and occurrences		alteration product in oxidation zones of the iron hut (gossan) of lead and zinc ore deposits with arsenate containing minerals

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

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