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: hexagonal Gibbs model, T = 733 K
Locality: synthetic refractory silica brick
_database_code_amcsd 0020938
5.052 5.052 8.27 90 90 120 P6_3/mmc
atom   x   y     z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Si   1/3 2/3 .4378  .0472  .0472  .0116  .0236      0      0
O1   1/3 2/3   .25  .1376  .1376  .0124  .0688      0      0
O2     0  .5     0  .0576  .1487  .0404  .0289 -.0252 -.0126