Cuprostibite Pearson W B Zeitschrift fur Kristallographie 171 (1985) 23-39 The Cu2Sb and related structures _database_code_amcsd 0010875 4.0006 4.0006 6.1043 90 90 90 P4/nmm atom x y z Cu1 0 0 0 Sb .5 0 .70 Cu2 .5 0 .270