ZrSi.95Se.995 Pearson W B Zeitschrift fur Kristallographie 171 (1985) 23-39 The Cu2Sb and related structures _database_code_amcsd 0010908 3.624 3.624 8.360 90 90 90 P4/nmm atom x y z Si 0 0 0 Se .5 0 .6219 Zr .5 0 .2574