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Georgiadesite with Paralaurionite - Vrysaki Point slag locality, Velatouri, Lavreotiki, East Attica, Attica, Greece (TL) (#:MINS9148)

Very rare monoclinic georgiadesite crystal 1.5 mm wide with paralaurionite xls in association from the type locality.

Formula :
Pb₄[(Cl,OH)₅/AsO₄]
System: monoclinic Hardness:3½ Rarity:very rare
Strunz id:VII/B.40-20 - PHOSPHATES, ARSENATES and VANADATES
Name origin: After Mr. Georgiadès, a Director of the mines at Laurium, Greece (in 1896). This is likely Georges Georgiadès, a graduate of the Paris School of Mines and who wrote La Vérité sur la Laurium grec in 1896.