Zircon
Hazen R M, Finger L W
American Mineralogist 64 (1979) 196-201
Crystal structure and compressibility of zircon at high pressure
crystal No. 2, P = 23.2 kbar
_database_code_amcsd 0000700
6.5808 6.5808 5.9670 90 90 90 *I4_1/amd
0 -.25 .125
atom x     y     z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Zr   0   .75  .125  .0018  .0018  .0020      0      0      0
Si   0   .25  .375  .0021  .0021  .0028      0      0      0
O    0 .0657 .1951  .0055  .0038  .0029      0      0  .0014