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_H136h, split Pb site _database_code_amcsd 0001960 8.418 13.076 14.365 90 115.28 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' .2717 -.0141 .0743 .6 .013 .046 .023 -.011 .005 .005 Pb" .2760 .0171 .0656 .4 .019 .072 .044 .014 .011 .020 Al1o .0055 .1775 .1105 .29 .009 .016 .008 -.004 .002 .001 Si1o .0055 .1775 .1105 .71 .009 .016 .008 -.004 .002 .001 Al1z .0040 .1794 .6147 .71 .011 .012 .010 -.003 .006 -.001 Si1z .0040 .1794 .6147 .29 .011 .012 .010 -.003 .006 -.001 Al2o .6942 .1186 .1719 .71 .006 .007 .012 -.001 .004 -.001 Si2o .6942 .1186 .1719 .29 .006 .007 .012 -.001 .004 -.001 Al2z .6897 .1153 .6735 .29 .008 .012 .007 .000 .002 -.001 Si2z .6897 .1153 .6735 .71 .008 .012 .007 .000 .002 -.001 Oa1 .0021 .1342 -.0010 .019 .020 .012 -.001 .008 -.003 Oa2 .5992 -.0003 .1462 .010 .010 .025 -.001 .006 -.002 Obo .8219 .1311 .1084 .017 .024 .027 .004 .010 .001 Obz .8169 .1305 .6146 .019 .022 .030 -.004 .014 -.001 Oco .0160 .3025 .1233 .023 .020 .021 -.006 .009 .003 Ocz .0206 .3092 .6310 .014 .017 .027 -.006 .005 -.002 Odo .1876 .1242 .1980 .018 .027 .015 .004 .002 .003 Odz .1946 .1222 .7007 .016 .026 .016 -.002 .003 -.001