Enstatite Jacob D, Palatinus L, Cuvillier P, Leroux H, Domeneghetti C, Camara F American Mineralogist 98 (2013) 1526-1534 Ordering state in orthopyroxene as determined by precession electron diffraction Locality: Wilson Terrane, North Victoria Land, Antarctica _database_code_amcsd 0020253 18.3022 8.8816 5.2082 90 90 90 Pbca atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) FeM1 .375724 .65432 .87012 .155 .00805 .00925 .00768 .00722 -.00009 -.00064 .00035 MgM1 .375724 .65432 .87012 .845 .00805 .00925 .00768 .00722 -.00009 -.00064 .00035 MgM2 .377827 .48401 .36401 .562 .01025 .01181 .01036 .00859 -.00119 -.00210 .00007 FeM2 .377827 .48401 .36401 .438 .01025 .01181 .01036 .00859 -.00119 -.00210 .00007 SiA .271647 .34083 .05069 .00705 .00744 .00693 .00676 -.00053 .00018 -.00012 SiB .473781 .33678 .79655 .00699 .00737 .00650 .00709 .00030 -.00033 .00017 O1A .18360 .33901 .03946 .00863 .0078 .0093 .0088 -.0001 .0002 .0001 O1B .56236 .33842 .79762 .00870 .0078 .0094 .0089 .0002 -.0006 .0002 O2A .31119 .50097 .04912 .01006 .0113 .0083 .0106 -.0026 -.0013 .0008 O2B .43343 .48423 .69310 .01035 .0118 .0094 .0097 .0024 -.0002 .0016 O3A .30274 .22748 -.17301 .01083 .0102 .0133 .0090 .0005 .0000 -.0037 O3B .44741 .19873 .59763 .01065 .0104 .0116 .0099 -.0012 .0001 -.0028