AM_Knasibfite Formula: K3 Na4 Si3 F22 B Name: Knasibfite Unit cell: 5.522 17.106 9.175 90.0 90.0 90.0 , V=866.66 Space group: IMM2 (44)

Demartin F , Gramaccioli C M , Campostrini I , Orlandi P , The Canadian Mineralogist , 46 (2008) p.447-453, Knasibfite, K3Na4[SiF6]3[BF4], a new hexafluorosilicate-tetrafluoroborate, from La Fossa Crater, Vulcano, Aeolian Islands, Italy, Locality: La Fossa Crater, Vulcano, Aeolian Islands, Italy