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Formula: K2Cu(SO4)2.6H2O
Hydrated sulphate, picromerite group
Crystal System: Monoclinic
Specific gravity: 2.224 measured, 2.23 calculated
Hardness: 2 to 2½
Streak: White
Colour: Greenish blue
Solubility: Soluble in water
Environments
Localities
The type locality is Mount Vesuvius, Somma-Vesuvius Complex, Naples, Campania, Italy.
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