Quartz Arnold H Zeitschrift fur Kristallographie 117 (1962) 467-469 Die struktur des hochquarzes Note: sample is at T = 650 deg C Note: symmetry constraints on the temperature factors were applied incorrectly _database_code_amcsd 0010604 5.01 5.01 5.47 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 .0033 .0033 .0025 .00165 0 0 O .4246 .2123 1/6 .0001 -.0078 .0967 .00005 -.0010 0