Feldspar Benna P, Tribaudino M, Bruno E American Mineralogist 81 (1996) 1337-1343 The structure of ordered and disordered lead feldspar (PbAl2Si2O8) Sample: ordered _database_code_amcsd 0001840 8.388 13.067 14.327 90 115.19 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 .2715 -.0098 .0731 .5 .009 .030 .021 -.002 .005 -.001 Si1(0) .0077 .1755 .1091 .007 .008 .006 -.002 .003 -.001 Al1(z) .0021 .1797 .6163 .006 .007 .007 -.002 .004 -.000 Al2(0) .6945 .1202 .1712 .004 .007 .008 .001 .003 .001 Si2(z) .6867 .1137 .6748 .005 .006 .009 -.001 .003 -.001 OA(l) .0062 .1336 .0006 .016 .015 .007 -.002 .005 .000 OA(2) .5956 -.0008 .1471 .007 .004 .017 .002 .004 .002 OB(O) .8280 .1295 .1055 .011 .014 .023 -.004 .012 -.001 OB(z) .8154 .1300 .6191 .009 .019 .022 -.002 .013 .001 OC(O) .0178 .2979 .1217 .013 .010 .018 -.005 .008 -.002 OC(Z) .0182 .3109 .6328 .011 .007 .018 -.003 .005 -.003 OD(O) .1833 .1230 .1957 .015 .021 .010 -.000 .000 .002 OD(z) .2006 .1202 .7010 .009 .014 .012 .001 .001 .001