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 = 1078 K _database_code_amcsd 0006378 4.9965 4.9965 5.4546 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 .0307 .0239 .0147 .01195 0 0 O .4157 .20785 1/6 .0635 .0604 .0405 .03175 0 -.0256