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 = 920 K _database_code_amcsd 0006375 4.9972 4.9972 5.4571 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 .0285 .0222 .0138 .0111 0 0 O .4149 .20745 1/6 .056 .0579 .0386 .028 0 -.0252