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 = 900 C
Locality: Franklin, New Jersey, USA
_database_code_amcsd 0000335
4.899 10.419 6.080 90 90 90 Pbnm
atom     x     y     z  occ Biso
Fe1      0     0     0 .564 1.02
Mg1      0     0     0 .359 1.02
Mn1      0     0     0 .077 1.02
Fe2  .9876 .2797   1/4 .536  .81
Mg2  .9876 .2797   1/4 .391  .81
Mn2  .9876 .2797   1/4 .073  .81
Si   .4284 .0957   1/4       .69
O1   .7649 .0921   1/4       .98
O2   .2135 .4524   1/4       .91
O3   .2847 .1631 .0375      1.04