data_global _chemical_name_mineral 'Andalusite' loop_ _publ_author_name 'Winter J K' 'Ghose S' _journal_name_full 'American Mineralogist' _journal_volume 64 _journal_year 1979 _journal_page_first 573 _journal_page_last 586 _publ_section_title ; Thermal expansion and high-temperature crystal chemistry of the Al2SiO5 polymorphs T = 600 deg C ; _database_code_amcsd 0000730 _chemical_formula_sum 'Al2 Si O5' _cell_length_a 7.8556 _cell_length_b 7.9424 _cell_length_c 5.5642 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 347.163 _exptl_crystal_density_diffrn 3.100 _symmetry_space_group_name_H-M 'P n n m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '1/2-x,1/2+y,1/2+z' '1/2+x,1/2-y,1/2-z' 'x,y,-z' '-x,-y,z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Al1 0.00000 0.00000 0.24190 Al2 0.37180 0.13980 0.50000 Si 0.24620 0.25410 0.00000 Oa 0.42360 0.36460 0.00000 Ob 0.10310 0.40080 0.00000 Oc 0.42490 0.36300 0.50000 Od 0.23290 0.13640 0.23920 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Al1 0.02157 0.01790 0.00769 0.00664 0.00000 0.00000 Al2 0.00844 0.01438 0.01020 -0.00063 0.00000 0.00000 Si 0.00813 0.01246 0.00894 0.00032 0.00000 0.00000 Oa 0.01094 0.01758 0.01051 -0.00379 0.00000 0.00000 Ob 0.01000 0.01406 0.03372 0.00126 0.00000 0.00000 Oc 0.01501 0.01438 0.01098 -0.00284 0.00000 0.00000 Od 0.01532 0.02013 0.01129 -0.00348 -0.00332 0.00313