data_global _amcsd_formula_title 'Mn2Al4Si5O18' loop_ _publ_author_name 'Knorr K' 'Meschke M' 'Winkler B' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 26 _journal_year 1999 _journal_page_first 521 _journal_page_last 529 _publ_section_title ; Structural and magnetic properties of Co2Al4Si5O18 and Mn2Al4Si5O18 cordierite ; _database_code_amcsd 0008230 _chemical_formula_sum 'Mn2 Al4 Si5 O18' _cell_length_a 17.128 _cell_length_b 9.764 _cell_length_c 9.147 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1529.724 _exptl_crystal_density_diffrn 2.806 _symmetry_space_group_name_H-M 'C c c m' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-z' '-x,y,1/2+z' '1/2-x,1/2+y,1/2+z' 'x,-y,1/2-z' '1/2+x,1/2-y,1/2-z' 'x,y,-z' '1/2+x,1/2+y,-z' '-x,-y,z' '1/2-x,1/2-y,z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Mn 0.33600 0.00000 0.25000 0.01393 AlT11 0.25000 0.25000 0.26200 0.01013 SiT16 0.00000 0.50000 0.25000 0.01013 SiT21 0.18600 0.08600 0.00000 0.01013 SiT23 0.13100 -0.24100 0.00000 0.01013 AlT26 0.04500 0.29900 0.00000 0.01013 O1 0.24380 -0.10540 0.35700 0.01165 O2 0.06040 -0.40660 0.35300 0.01165 O3 -0.17730 -0.30440 0.35800 0.01165 O4 0.04160 -0.24550 0.00000 0.01165 O5 0.11640 0.18800 0.00000 0.01165 O6 0.16490 -0.07600 0.00000 0.01165