AM_Usovite Formula: Ba2 Ca Mg Al2 F14 Name: Usovite Unit cell: 13.565 5.2 14.577 90.0 91.5 90.0 , V=1027.88 Space group: C12/C1 (15)

Litvin A L , Petrunina A A , Ostapenko S S , Dopovidi Akademii Nauk Ukrainskoi RSR Seriya B-Geologichni Khimichni Ta Biologichni Nauki , 3 (1980) p.47-80, Crystal structure of usovite