Corundum Newnham R E, de Haan Y M Zeitschrift fur Kristallographie 117 (1962) 235-237 Refinement of the alpha Al2O3, Ti2O3, V2O3 and Cr2O3 structures Locality: synthetic _database_code_amcsd 0010593 4.7589 4.7589 12.991 90 90 120 R-3c atom x y z Al 0 0 .3520 O .306 0 .25