Enstatite 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 0007922 18.456 8.960 5.270 90 90 90 Pbca atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Mg1 .3753 .6510 .8841 2.629 .0025 .0073 .0191 .0003 -.0007 .0001 Mg2 .3765 .4878 .3791 3.736 .0040 .0097 .0240 -.0010 -.0013 .0021 SiA .2710 .3397 .0642 2.318 .0026 .0058 .0143 .0002 -.0001 -.0016 SiB .4761 .3385 .7842 2.095 .0022 .0053 .0143 .0004 -.0005 .0014 O1A .1832 .3401 .0564 2.296 .0008 .0100 .0229 .0004 -.0020 .0024 O1B .5638 .3428 .7859 1.878 .0004 .0087 .0213 -.0001 -.0006 -.0017 O2A .3116 .4980 .0626 3.066 .0032 .0064 .0249 -.0015 -.0009 .0009 O2B .4356 .4858 .7005 2.772 .0024 .0082 .0213 .0007 -.0007 .0004 O3A .3020 .2280 -.1629 2.321 .0003 .0141 .0181 .0006 .0010 -.0030 O3B .4499 .2099 .5761 3.172 .0019 .0134 .0241 -.0004 .0003 -.0099