Forsterite
Hazen R M
American Mineralogist 61 (1976) 1280-1293
Effects of temperature and pressure on the crystal structure of forsterite
T = 1000 C P = 1 atm
olivine
_database_code_amcsd 0000549
4.795 10.36 6.06 90 90 90 Pbnm
atom     x     y     z B(1,1) B(2,2) B(3,3)  B(1,2) B(1,3) B(2,3)
Si   .4263 .0943   .25  .0068  .0027  .0077   .0004      0      0
Mg1      0     0     0  .0154  .0059  .0092  -.0004 -.0017 -.0017
Mg2  .9924 .2772   .25  .0183  .0038  .0122   .0005      0      0
O1   .7631 .0914   .25  .0118  .0043  .0108   .0046      0      0
O2   .2178 .4497   .25  .0135  .0032  .0106       0      0      0
O3   .2843 .1629 .0359  .0163  .0045  .0103  -.0003 -.0005  .0019