Tridymite
Dollase W A
Acta Crystallographica 23 (1967) 617-623
The crystal structure at 220 C of orthothombic high tridymite
from the Steinbach meteorite
Note: T = 220 C
Locality: Steinbach meteorite
_database_code_amcsd 0020733
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   .16846 .53589 .43857  .0119  .0260  .0119  .0012 -.0001 -.0013
O1    .3336      0    .75   .040   .080   .017      0      0   .009
O2        0  .5597     .5   .012   .136   .030      0   .002      0
O3    .2547  .3029  .5213   .041   .054   .025   .024  -.006   .008