UPSe Pearson W B Zeitschrift fur Kristallographie 171 (1985) 23-39 The Cu2Sb and related structures _database_code_amcsd 0010900 3.951 3.951 8.185 90 90 90 P4/nmm atom x y z P 0 0 0 Se .5 0 .6435 U .5 0 .261