Zircon
Hazen R M, Finger L W
American Mineralogist 64 (1979) 196-201
Crystal structure and compressibility of zircon at high pressure
crystal No. 1, P = 9.8 kbar
_database_code_amcsd 0000698
6.5927 6.5927 5.9742 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  .0017  .0017  .0023      0      0      0
Si   0   .25  .375  .0031  .0031  .0022      0      0      0
O    0 .0661 .1962  .0038  .0043  .0020      0      0  .0010