USb2 Pearson W B Zeitschrift fur Kristallographie 171 (1985) 23-39 The Cu2Sb and related structures _database_code_amcsd 0010921 4.272 4.272 8.741 90 90 90 P4/nmm atom x y z Sb1 0 0 0 Sb2 .5 0 .635 U .5 0 .280