Usovite Litvin A L, Petrunina A A, Ostapenko S S Dopovidi Akademii Nauk Ukrainskoi RSR Seriya B-Geologichni Khimichni Ta Biologichni Nauki 3 (1980) 47-80 Crystal structure of usovite _database_code_amcsd 0012515 13.565 5.200 14.577 90 91.50 90 C2/c atom x y z Biso Ba .3086 .4576 .3820 .146 Ca 0 .4376 .25 .146 Mg 0 .5 0 .146 Al .3844 .4946 .1219 .146 F1 .2602 .4577 .0784 .146 F2 .0787 .1879 .9748 .146 F3 .3871 .2113 .5504 .146 F4 .0058 .0626 .1595 .146 F5 .3407 .3012 .7142 .146 F6 .1258 .2803 .8054 .146 F7 .4344 .0536 .3814 .146