AM_Thermessaite Formula: K2 Al F3 S O4 Name: Thermessaite Unit cell: 10.81 8.336 6.822 90.0 90.0 90.0 , V=614.75 Space group: PBCN (60)

Demartin F , Gramaccioli C M , Campostrini I , Orlandi P , The Canadian Mineralogist , 46 (2008) p.693-700, Thermessaite, K2[AlF3|SO4], a new ino-aluminofluoride-sulfate from La Fossa crater, Vulcano, Aeolian Islands, Italy, Locality: La Fossa crater, Vulcano, Aeolian Islands, Italy, Note: z-coordinate of S altered