Grossular Rodehorst U, Geiger C A, Armbruster T American Mineralogist 87 (2002) 542-549 The crystal structures of grossular and spessartine between 100 and 600 K and the crystal chemistry of grossular-spessartine solid solutions Sample: T = 103 K _database_code_amcsd 0002766 11.840 11.840 11.840 90 90 90 Ia-3d atom x y z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) O .03816 .04558 .65135 .0033 .0043 .0027 .0001 -.0005 -.0002 Ca 0 .25 1/8 .0032 .0032 .0022 .0005 0 0 Al 0 0 0 .0025 .0025 .0025 -.0002 -.0002 -.0002 Si 3/8 0 .25 .0026 .0024 .0024 0 0 0