Quartz
Glinnemann J, King H E, Schulz H, Hahn T, La Placa S J, Dacol F
Zeitschrift fur Kristallographie 198 (1992) 177-212
Crystal structures of the low-temperature quartz-type phases of SiO2 and GeO2 at elevated pressure
P = 10.2 GPa
_database_code_amcsd 0011010
4.604  4.604  5.207  90 90 120 *P3_121
0 0 .3333333333333333
atom     x     y      z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Si   .4458     0      0  .0052  .0039  .0048 .00195  .0003  .0006
O    .3951 .3031 -.0921  .0106  .0072  .0076  .0061  .0017  .0020