Donpeacorite
Stimpfl M
American Mineralogist 90 (2005) 155-161
The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn0.54Ca0.03Mg1.43Si2O6)
and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene
Sample: quenched from 806 deg C ORD
_database_code_amcsd 0003672
18.3559 8.8741 5.2256 90 90 90 Pbca
atom      x      y      z   occ  Biso
Mg1  .37537 .65388 .87211 .9458 .4982
Mn1  .37537 .65388 .87211 .0527 .4982
Ti1  .37537 .65388 .87211 .0015 .4982
Mg2  .37748 .48038 .36831 .4867 .7196
Mn2  .37748 .48038 .36831 .4888 .7196
Ca2  .37748 .48038 .36831 .0245 .7196
SiA  .27112 .34111 .04829       .3896
SiB  .47480 .33782 .79509 .9969 .3921
AlB  .47480 .33782 .79509 .0031 .3921
O1A  .18333 .33863 .04025       .4468
O2A  .30981 .50159 .04607       .6084
O3A  .30224 .22911 .82245       .6544
O1B  .56299 .33892 .79688       .5149
O2B  .43501 .48701 .70056       .7434
O3B  .44774 .20373 .59118       .6875