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 = 61.7 kbar _database_code_amcsd 0001103 4.763 10.849 6.294 90 90 90 Pbnm atom x y z Biso Mg 0 0 0 .86 Ca .9733 .2757 .25 .94 Si .4134 .0807 .25 .77 O1 .7477 .0760 .25 1.42 O2 .2476 .4461 .25 1.11 O3 .2715 .1476 .0450 1.057