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 = 693 K
Locality: synthetic refractory silica brick
_database_code_amcsd 0020937
5.047 5.047 8.262 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 .4379  .0473  .0473  .0116  .0237      0      0
O1   1/3 2/3   .25  .1433  .1433  .0118  .0717      0      0
O2     0  .5     0  .0577  .1453  .0411  .0289 -.0267 -.0134