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Thermessaite

Type Locality
La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Messina Province, Sicily, Italy
Mineral Data
K2(AlF3)(SO4)
Strunz: 
3.CG.25
Physical Properties
Streak: 
white
Hardness: 
0.0
Tenacity: 
brittle
Photos