Quartz Hazen R M, Finger L W, Hemley R J, Mao H K Solid State Communications 72 (1989) 507-511 High-pressure crystal chemistry and amorphization of alpha-quartz Locality: synthetic Sample: P = 1 bar _database_code_amcsd 0015462 4.914 4.914 5.406 90 90 120 P3_121 atom x y z Biso Si1 .4699 0 1/3 .51 O1 .4130 .2668 .2140 .86