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 = 298 K _database_code_amcsd 0006362 4.9137 4.9137 5.4047 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 .4697 0 0 .0080 .0061 .0045 .00305 -.00015 -.0003 O .4133 .2672 .1188 .0179 .0130 .0085 .0102 -.0026 -.0041