Forsterite 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 T = 900 C Locality: synthetic _database_code_amcsd 0000331 4.795 10.355 6.060 90 90 90 Pbnm atom x y z Biso Mg1 0 0 0 1.77 Mg2 .9924 .2795 1/4 1.69 Si .4263 .0943 1/4 .96 O1 .7631 .0914 1/4 1.59 O2 .2178 .4497 1/4 1.40 O3 .2843 .1629 .0359 1.72