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, 1 atm - before P
_database_code_amcsd 0000697
6.6042 6.6042 5.9796 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 .00171 .00171  .00161      0      0      0
Si   0   .25  .375 .00191 .00191 .001857      0      0      0
O    0 .0660 .1951  .0048  .0022   .0020      0      0 -.0006