Mn2As Pearson W B Zeitschrift fur Kristallographie 171 (1985) 23-39 The Cu2Sb and related structures _database_code_amcsd 0010882 3.769 3.769 6.278 90 90 90 P4/nmm atom x y z Mn1 0 0 0 Mn2 .5 0 .67 As .5 0 .265