Corundum Finger L W, Hazen R M Journal of Applied Physics 49 (1978) 5823-5826 Crystal structure and compression of ruby to 46 kbar P = 11 kbar _database_code_amcsd 0012922 4.7537 4.7537 12.9725 90 90 120 R-3c atom x y z Biso Al 0 0 .3520 .26 O .3060 0 .25 .48