AM_Bultfonteinite
Formula: Ca2 Si F (O5 H3)
Name: Bultfonteinite
Unit cell: 10.992 8.185 5.671 93.95 91.32 89.85 , V=508.87
Space group: P-1 (2)

McIver E J , Acta Crystallographica , 16 (1963) p.551-558, The structure of bultfonteinite, Ca4Si2O10F2H6, Locality: Bultfontein mine, Kimberley, South Africa