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 = 693 K
Locality: synthetic refractory silica brick
_database_code_amcsd 0020935
8.742 5.047 8.262 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   .1673 .5099 .4378  .0121  .0341  .0118 -.0003 -.0006 -.0018
O1   .3275     0   .75   .344  .1023  .0131                .0068
O2       0 .5252    .5  .0127  .1699  .0365         .0082
O3   .2487 .2655 .5049  .0400  .0762  .0385  .0263 -.0069  .0132