AM_Corundum_20
Formula: Al2 O3
Name: Corundum
Unit cell: 5.12 5.12 5.12 55.28 55.28 55.28 , V=84.50
Space group: R-3C (167)

Pauling L , Hendricks S B , Journal of the American Chemical Society , 47 (1925) p.781-790, Crystal structures of hematite and corundum, Locality: Ceylon