Monticellite
Sharp Z D, Hazen R M, Finger L W
American Mineralogist 72 (1987) 748-755
High-pressure crystal chemistry of monticellite, CaMgSiO4
Sample: P = 53.0 kbar
_database_code_amcsd 0001102
4.770 10.882 6.305 90 90 90 Pbnm
atom     x     y     z Biso
Mg       0     0     0 1.06
Ca   .9744 .2754   .25 1.02
Si   .4117 .0807   .25  .88
O1   .7473 .0770   .25 1.32
O2   .2474 .4456   .25 1.17
O3   .2723 .1472 .0449  .92