AM_Corundum Formula: Al2 O3 Name: Corundum Unit cell: 4.7602 4.7602 12.9933 90.0 90.0 120.0 , V=254.98 Space group: R-3C (167)

Lewis J , Schwarzenbach D , Flack H D , Acta Crystallographica, Section A , 38 (1982) p.733-739, Electric field gradients and charge density in corundum alpha-Al2O3