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 = 28.9 kbar
_database_code_amcsd 0000701
6.5737 6.5737 5.9638 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  .0012      0      0      0
Si   0   .25  .375  .0025  .0025  .0023      0      0      0
O    0 .0654 .1954  .0033  .0029  .0020      0      0 -.0001