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 = 7.2 GPa
_database_code_amcsd 0011009
4.6764 4.6764 5.2475 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 .4503     0      0  .0053  .0041  .0051 .00205  .0003  .0006
O  .4012 .2971 -.0961  .0119  .0082  .0083  .0070  .0026  .0030