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 = 1012 K _database_code_amcsd 0006377 4.9964 4.9964 5.4543 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 .0296 .0231 .0145 .01155 0 0 O .415 .2075 1/6 .0618 .0595 .0401 .0309 0 -.0249