Barberiite Hoard J, Blair V Journal of the American Chemical Society 57 (1935) 1985-1988 The crystal structures of rubidium and ammonium fluoborates _cod_database_code 1011135 _database_code_amcsd 0018024 9.06 5.64 7.23 90 90 90 Pnma atom x y z NH4 .308 .25 .328 B1 .947 .25 .697 F1 .086 .25 .603 F2 .83 .25 .563 F3 .936 .043 .811