Monticellite
Lager G A, Meagher E P
American Mineralogist 63 (1978) 365-377
High-temperature structural study of six olivines
T = 795 deg C, sample is from Crestmore, California, USA
_database_code_amcsd 0000649
4.857 11.199 6.454 90 90 90 Pbnm
atom     x     y     z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Mg       0     0     0 .93  .0166  .0041  .0130 -.0015 -.0042 -.0003
Fe       0     0     0 .07  .0166  .0041  .0130 -.0015 -.0042 -.0003
Ca   .9753 .2789   .25      .0215  .0032  .0130  .0007      0      0
Si   .4076 .0829   .25      .0107  .0029  .0108 -.0003      0      0
O1   .7398 .0785   .25      .0137  .0061  .0218      0      0      0
O2   .2463 .4521   .25      .0147  .0030  .0162  .0001      0      0
O3   .2729 .1479 .0477      .0232  .0038  .0135  .0009 -.0005  .0016