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Marialite

Type Locality
Pianura, Phlegrean Fields, Naples Province, Phlegrean Volcanic complex, Campania, Italy
Mineral Data
Na4Al3Si9O24Cl
Strunz: 
9.FB.15
Physical Properties
Streak: 
White
Hardness: 
5.5 - 6.0
Tenacity: 
very brittle
Synonyms
Synonyms: 
Mizzonite