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 = 733 K
Locality: synthetic refractory silica brick
_database_code_amcsd 0020936
8.74 5.04 8.24 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   .1668 .4914 .4377  .0114  .0335  .0116 -.0036      0 -.0011
O1   .3328     0   .75  .0352  .1057  .0123               -.0048
O2       0 .5163    .5  .0138  .1403  .0395         .0104
O3   .2548 .2530 .4956  .0357  .0649  .0400  .0228 -.0051  .0173