Tridymite
Kihara K, Matsumoto T, Imamura M
Zeitschrift fur Kristallographie 177 (1986) 27-38
Structural change of orthorhombic-I tridymite with temperature:
A study based on second-order thermal-vibrational parameters
Note: Dollase's model, T = 493 K
Locality: synthetic refractory silica brick
_database_code_amcsd 0020932
8.756 5.024 8.213 90 90 90 *C222_1
0 0 .25
atom     x     y     z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Si   .1681 .5470 .4379  .0095  .0347  .0106  .0010  .0004 -.0025
O1   .3315     0   .75  .0287  .0931  .0112                .0070
O2       0 .5714    .5  .0107  .1390  .0356        -.0004
O3   .2535 .3176 .5292  .0366  .0630  .0262  .0254 -.0045  .0091