MgBaGe Pearson W B Zeitschrift fur Kristallographie 171 (1985) 23-39 The Cu2Sb and related structures _database_code_amcsd 0010886 4.64 4.64 7.92 90 90 90 P4/nmm atom x y z Mg 0 0 0 Ba .5 0 .661 Ge .5 0 .205