Forsterite
Hazen R M
American Mineralogist 61 (1976) 1280-1293
Effects of temperature and pressure on the crystal structure of forsterite
T = -196 C, P = 1 atm
olivine
_database_code_amcsd 0000545
4.746 10.18 5.976 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   .4261 .0939   .25 -.0018  .0002  .0002  .0001      0      0
Mg1      0     0     0  .0002  .0005  .0002  .0002 -.0001 -.0002
Mg2  .9914 .2772   .25  .0001  .0004  .0004 -.0000      0      0
O1   .7661 .0919   .25 -.0002  .0005  .0011  .0005      0      0
O2   .2202 .4469   .25 -.0002  .0001  .0008      0      0      0
O3   .2777 .1628 .0333 -.0002  .0004  .0002      0  .0003      0