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 = 498 K _database_code_amcsd 0006364 4.9297 4.9297 5.4151 90 90 120 *P3_221 0 0 .6666666666666667 atom x y z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Si .4723 0 0 .0124 .0098 .0067 .0049 -.00015 -.0003 O .4141 .2630 .1224 .0282 .0208 .0131 .0162 -.0039 -.0068