Forsterite
Smyth J R, Hazen R M
American Mineralogist 58 (1973) 588-593
The crystal structures of forsterite and hortonolite at several temperatures
up to 900 C
T = 600 C
Locality: synthetic
_database_code_amcsd 0000330
4.778 10.290 6.017 90 90 90 Pbnm
atom     x     y     z Biso
Mg1      0     0     0 1.17
Mg2  .9919 .2785   1/4 1.14
Si   .4257 .0941   1/4  .61
O1   .7637 .0906   1/4 1.10
O2   .2178 .4497   1/4  .95
O3   .2822 .1619 .0352 1.10