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 = 443 K
Locality: synthetic refractory silica brick
_database_code_amcsd 0020931
8.730 5.000 8.201 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   .1685 .5512 .4380  .0076  .0358  .0109  .0008  .0013 -.0021
O1   .3272     0   .75  .0248  .1046  .0111                .0083
O2       0 .5774    .5  .0084  .1338  .0328        -.0054
O3   .2503 .3182 .5301  .0345  .0847  .0256  .0273  .0007  .0057