Mn2 O5 Sr2 Caignaert V, Nguyen N, Hervieu M, Raveau B Materials Research Bulletin 20 (1985) 479-484 Sr2Mn2O5, an oxygen-defect perovskite with Mn(III) in square pyramidal coordination _cod_database_code 1001352 _database_code_amcsd 0014316 5.523 10.761 3.811 90 90 90 Pbam atom x y z Mn1 .2583 .1236 0 O1 .2790 .0912 .5 O2 .5530 .2259 0 O3 0 0 0