Protoenstatite Yang H, Ghose S Physics and Chemistry of Minerals 22 (1995) 300-310 High temperature single crystal X-ray diffraction studies of the ortho-proto phase transition in enstatite, Mg2Si2O6 at 1360 K Sample: T = 1360 K _database_code_amcsd 0007923 9.306 8.886 5.360 90 90 90 Pbcn atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Mg1 0 .1003 .7500 2.260 .0075 .0073 .0164 0 -.0012 0 Mg2 0 .2621 .2500 2.776 .0087 .0092 .0211 0 -.0013 0 SiA .2928 .0901 .0742 1.525 .0043 .0052 .0126 -.0008 .0003 .0006 O1A .1184 .0947 .0793 2.120 .0042 .0084 .0198 .0001 -.0005 -.0015 O2A .3775 .2454 .0672 2.837 .0098 .0074 .0242 -.0047 -.0008 .0001 O3A .3489 .9847 .3071 3.119 .0059 .0157 .0205 .0001 .0001 .0079