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Microsommite

Type Locality
Cupa dell'Olivella, Sant'Anastasia, Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy
Mineral Data
Na4K2Ca2(Al6Si6O24)(SO4)Cl2
Strunz: 
9.FB.05
Physical Properties
Streak: 
white
Hardness: 
6.0