Quartz Kihara K European Journal of Mineralogy 2 (1990) 63-77 An X-ray study of the temperature dependence of the quartz structure Sample: at T = 869 K _database_code_amcsd 0006373 4.9971 4.9971 5.4574 90 90 120 P6_222 atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si .5 0 0 .0278 .0218 .0132 .0109 0 0 O .4155 .20775 1/6 .0537 .0577 .0387 .02685 0 -.0263