Tricalcium aluminate Steele F A, Davey W P Journal of the American Chemical Society 51 (1929) 2283-2293 The crystal structure of tricalcium aluminate _database_code_amcsd 0017746 7.624 7.624 7.624 90 90 90 Pm3m atom x y z Ca1 0 0 0 Ca2 .24 .24 .24 Al1 .5 .5 0 Al2 .5 0 0 O1 .31 .5 .5 O2 .25 0 .5