Al0.72 Ca2 Fe1.28 O5 Colville A, Geller S Acta Crystallographica B28 (1972) 3196-3200 Crystal structures of Ca2Fe1.43Al0.57O5 and Ca2Fe1.28Al0.72O5 _cod_database_code 1200007 _database_code_amcsd 0018286 5.583 14.58 5.374 90 90 90 Ibm2 atom x y z occ Ca1 .0270 .1084 .4907 Fe1 0 0 0 .83 Al1 0 0 0 .17 Fe2 .9291 .25 .9520 .45 Al2 .9291 .25 .9520 .55 O1 .2525 .9859 .2503 O2 .0683 .1429 .256 O3 .8653 .25 .6133