Orthopyroxene Tachi T, Horiuchi H, Nagasawa H Physics and Chemistry of Minerals 24 (1997) 463-476 Structure of Cu-bearing orthopyroxene, Mg(Cu.56,Mg.44)Si2O6, and behavior of Cu2+ in the orthopyroxene structure _database_code_amcsd 0008029 18.221 8.890 5.2260 90 90 90 Pbca atom x y z occ Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) MgM1 .12430 .3474 .3864 .42 .0004 .0008 .0043 .0000 -.00004 .0001 MgM2 .12494 -.00781 .3813 .436 .48 .0005 .00087 .0046 .00007 .00036 .00046 CuM2 .12494 -.00781 .3813 .564 .48 .0005 .00087 .0046 .00007 .00036 .00046 SiTA .22621 -.1610 .0739 .29 .00027 .00065 .0028 .00008 -.00007 -.0001 SiTB .02583 -.3374 .2821 .34 .00036 .00068 .0029 .00004 -.00009 -.0001 O1A .1856 .3355 .0635 .52 .00039 .0014 .0052 -.00002 .0001 -.00002 O2A .1875 .0015 .0742 .67 .00067 .0010 .0074 .0004 .0001 .0004 O3A .1945 -.2282 .3485 .63 .00052 .0022 .0045 .00010 -.0004 .0012 O1B .0637 .1590 .2156 .44 .00035 .0012 .0044 .00006 -.0001 .0004 O2B .0678 .5123 .1931 .58 .00068 .0011 .0045 .00020 -.0001 -.0004 O3B .0508 -.2056 .0760 .58 .00052 .0020 .0037 -.00024 .0000 .0014