Feldspar Benna P, Bruno E American Mineralogist 88 (2003) 1532-1541 Single-crystal in situ high-temperature structural investigation of the I-1 - I2/c phase transition in Ca0.2Sr0.8Al2Si2O8 feldspar T = 400 C _database_code_amcsd 0003179 8.377 12.971 14.275 90.46 115.49 90.30 I-1 atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ca(0) .2713 -.0002 .0665 .2 .034 .017 .045 .037 .000 .008 -.011 Sr(0) .2713 -.0002 .0665 .8 .034 .017 .045 .037 .000 .008 -.011 Ca(z) .2702 .0041 .5650 .2 .031 .017 .040 .034 .001 .009 -.001 Sr(z) .2702 .0041 .5650 .8 .031 .017 .040 .034 .001 .009 -.001 SiT1(00) .0074 .1725 .1079 .016 .017 .019 .015 -.003 .009 -.001 AlT1(0z) .0027 .1762 .6158 .016 .019 .016 .017 -.003 .010 -.001 AlT1(m0) .0024 .8205 .1168 .016 .019 .018 .015 .004 .010 .001 SiT1(mz) .0073 .8234 .6090 .016 .017 .018 .015 .004 .009 .000 AlT2(00) .6945 .1197 .1691 .016 .015 .016 .018 -.001 .008 .000 SiT2(0z) .6846 .1123 .6700 .015 .014 .013 .018 -.001 .007 -.001 SiT2(m0) .6862 .8860 .1740 .016 .016 .013 .018 .002 .007 .000 AlT2(mz) .6942 .8786 .6717 .016 .016 .015 .018 .001 .009 .000 OA(10) .0054 .1292 .9994 .024 .031 .026 .018 .000 .014 -.001 OA(1z) .9950 .1298 .4979 .025 .033 .029 .017 .002 .016 .002 OA(20) .5920 .9983 .1431 .024 .020 .014 .036 .002 .009 .003 OA(2z) .5913 .9985 .6426 .024 .019 .014 .036 .000 .010 .000 OB(00) .8278 .1237 .1039 .029 .025 .035 .033 -.009 .020 -.004 OB(0z) .8079 .1241 .6097 .031 .027 .034 .041 -.005 .024 .002 OB(m0) .8100 .8696 .1149 .034 .029 .040 .043 .008 .026 -.002 OB(mz) .8292 .8700 .6080 .029 .025 .035 .035 .008 .021 .003 OC(00) .0147 .2953 .1212 .030 .033 .019 .038 -.008 .015 -.005 OC(0z) .0188 .3080 .6340 .028 .025 .020 .038 -.008 .014 -.005 OC(m0) .0172 .6879 .1274 .028 .024 .021 .035 .008 .009 .002 OC(mz) .0127 .7001 .6150 .029 .032 .019 .035 .008 .013 .004 OD(00) .1863 .1221 .1943 .032 .028 .041 .024 .006 .008 .004 OD(0z) .1966 .1161 .7012 .029 .030 .031 .020 .004 .004 .003 OD(m0) .1977 .8794 .2058 .030 .025 .034 .024 -.001 .004 -.004 OD(mz) .1877 .8717 .6979 .032 .028 .042 .020 -.001 .004 -.005