Fayalite
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
Note: variety hortonolite
T = 300 C
Locality: Franklin, New Jersey, USA
_database_code_amcsd 0000333
4.822 10.456 6.101 90 90 90 Pbnm
atom     x     y    z  occ Biso
Fe1      0     0    0 .582 1.52
Mg1      0     0    0 .339 1.52
Mn1      0     0    0 .079 1.52
Fe2  .9878 .2802  1/4 .518 1.23
Mg2  .9878 .2802  1/4 .411 1.23
Mn2  .9878 .2802  1/4 .071 1.23
Si   .4289 .0958  1/4       .96
O1   .7632 .0926  1/4      1.29
O2   .2123 .4514  1/4      1.37
O3   .2853 .1631 .037      1.48