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 = 653 K
Locality: synthetic refractory silica brick
_database_code_amcsd 0020934
8.743 5.046 8.254 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   .1686 .5222 .4382  .0118  .0327  .0114  .0016  .0004 -.0016
O1   .3268     0   .75  .0317  .0987  .0112                .0089
O2       0 .5401    .5  .0133  .1452  .0387        -.0033
O3   .2554 .2853 .5130  .0380  .0667  .0359  .0232 -.0023  .0139