B4 Ni7 O16 U Gasperin M Acta Crystallographica C45 (1989) 981-983 Synthese et structure du tetraborouranate de nickel, Ni7 B4 U O16 _cod_database_code 1001392 _database_code_amcsd 0010077 5.861 20.200 4.501 90 90 90 Pmnn atom x y z U1 0 0 0 Ni1 0 .5 0 Ni2 0 .2628 .4996 Ni3 .2488 .1289 .4980 B1 0 .5874 .5528 B2 0 .1921 .051 O1 .1981 .2050 .2041 O2 0 .1765 .7455 O3 0 .3466 .2746 O4 .2911 .0510 .7846 O5 0 .0704 .2856 O6 0 .5859 .2499