UAsSe Pearson W B Zeitschrift fur Kristallographie 171 (1985) 23-39 The Cu2Sb and related structures _database_code_amcsd 0010904 3.981 3.981 8.371 90 90 90 P4/nmm atom x y z As 0 0 0 Se .5 0 .6315 U .5 0 .2696