Feldspar Benna P, Tribaudino M, Bruno E American Mineralogist 81 (1996) 1337-1343 The structure of ordered and disordered lead feldspar (PbAl2Si2O8) Sample: disordered _database_code_amcsd 0001839 8.428 13.054 7.174 90 115.32 90 C2/m atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb .2749 .0213 .1406 .5 .022 .052 .043 .016 .008 .004 Si1 .0038 .1793 .2258 .5 .018 .013 .016 .005 .009 -.001 Al1 .0038 .1793 .2258 .5 .018 .013 .016 .005 .009 -.001 Si2 .6932 .1170 .3455 .5 .010 .006 .008 .000 .003 .000 Al2 .6932 .1170 .3455 .5 .010 .006 .008 .000 .003 .000 OA(l) 0 .1353 0 .027 .019 .015 .000 .007 .000 OA(2) .6033 0 .2956 .019 .012 .031 .000 .010 .000 OB .8175 .1311 .2214 .028 .025 .032 .000 .017 .001 OC .0181 .3066 .2539 .025 .019 .029 -.006 .014 .002 OD .1905 .1249 .4010 .025 .028 .016 .001 .001 -.001