Feldspar Tribaudino M, Benna P, Bruno E American Mineralogist 83 (1998) 159-166 Structural variations induced by thermal treatment in lead feldspar (PbAl2Si2O8) Sample: PbF_L1h, split Pb site _database_code_amcsd 0001954 8.395 13.081 14.343 90 115.27 90 I2/c atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb' .2699 -.0111 .0736 .6 .013 .027 .015 -.007 .004 .000 Pb" .2758 -.0029 .0704 .4 .026 .119 .044 .009 .022 -.003 Al1o .0078 .1760 .1091 .075 .014 .014 .006 -.003 .006 -.001 Si1o .0078 .1760 .1091 .925 .014 .014 .006 -.003 .006 -.001 Al1z .0022 .1797 .6164 .925 .013 .013 .009 -.003 .008 -.001 Si1z .0022 .1797 .6164 .075 .013 .013 .009 -.003 .008 -.001 Al2o .6948 .1201 .1711 .925 .013 .010 .008 .000 .007 .000 Si2o .6948 .1201 .1711 .075 .013 .010 .008 .000 .007 .000 Al2z .6873 .1140 .6749 .075 .012 .011 .009 .001 .007 .001 Si2z .6873 .1140 .6749 .925 .012 .011 .009 .001 .007 .001 OA(1) .0052 .1342 .0009 .027 .021 .009 -.002 .012 -.002 OA(2) .5944 -.0005 .1459 .015 .011 .022 -.002 .009 .000 OB(o) .8256 .1289 .1060 .014 .019 .023 .004 .012 -.001 OB(Z) .8137 .1301 .6183 .014 .022 .031 -.001 .017 .003 OC(O) .0189 .2987 .1219 .021 .017 .019 -.002 .010 -.002 OC(Z) .0190 .3108 .6323 .018 .018 .020 -.003 .010 .004 OD(o) .1845 .1233 .1957 .021 .028 .011 .003 .008 .005 OD(Z) .2021 .1210 .7011 .018 .018 .015 .004 .004 .004