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Voltaite
Type Locality
Solfatara di Pozzuoli, Pozzuoli, Phlegrean Fields, Naples Province, Phlegrean Volcanic Complex, Campania, Italy
Mineral Data
K
2
Fe
2+
5
Fe
3+
3
Al(SO
4
)
12
·18H
2
O
Strunz:
7.CC.25
Physical Properties
Hardness:
3.0 - 3.5
