Fayalite
Birle J D, Gibbs G V, Moore P B, Smith J V
American Mineralogist 53 (1968) 807-824
Crystal structures of natural olivines
Note: variety hortonolite
_database_code_amcsd 0000174
4.787 10.341 6.044 90 90 90 Pbnm
atom      x      y      z occ Biso
Mg1       0      0      0 .49  .36
Fe1       0      0      0 .49  .36
Mn1       0      0      0 .01  .36
Ca1       0      0      0 .01  .36
Mg2  .98678 .27915    .25 .49  .47
Fe2  .98678 .27915    .25 .49  .47
Mn2  .98678 .27915    .25 .01  .47
Ca2  .98678 .27915    .25 .01  .47
Si   .42870 .09576    .25      .18
O1   .76844 .09173    .25      .28
O2   .21419 .44958    .25      .18
O3   .28401 .16395 .03442      .37