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 = 25 C
Locality: Franklin, New Jersey, USA
_database_code_amcsd 0000332
4.798 10.387 6.055 90 90 90 Pbnm
atom     x     y     z  occ Biso
Fe1      0     0     0 .562  .44
Mg1      0     0     0 .361  .44
Mn1      0     0     0 .077  .44
Fe2  .9867 .2792   1/4 .538  .33
Mg2  .9867 .2792   1/4 .389  .33
Mn2  .9867 .2792   1/4 .073  .33
Si   .4287 .0957   1/4       .33
O1   .7661 .0918   1/4       .49
O2   .2127 .4514   1/4       .50
O3   .2844 .1633 .0357       .55