Thortveitite Bianchi R, Pilati T, Diella V, Gamaccioli C M, Mannucci G American Mineralogist 73 (1988) 601-607 A re-examination of thortveitite Sample 1 from Iveland _database_code_amcsd 0001160 6.650 8.616 4.686 90 102.20 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) Sc 0 .30503 .5 .56 .0074 .0082 .0082 0 .0003 0 Y 0 .30503 .5 .44 .0074 .0082 .0082 0 .0003 0 Si .22108 0 -.08762 .98 .0079 .0086 .0056 0 -.0007 0 Al .22108 0 -.08762 .02 .0079 .0086 .0056 0 -.0007 0 O1 0 0 0 .0075 .0777 .0426 0 .0083 0 O2 .38654 0 .22171 .0095 .0106 .0062 0 -.0016 0 O3 .23655 .15499 -.28174 .0262 .0086 .0095 .0023 .0022 .0021