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 = 46 kbar
_database_code_amcsd 0012926
4.7352 4.7352 12.9176 90 90 120 R-3c
atom     x y     z Biso
Al       0 0 .3522  .28
O    .3065 0   .25  .63