data_global _chemical_name_mineral 'Indialite' loop_ _publ_author_name 'Schwartz K B' 'Leong D B' 'McConville R L' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 20 _journal_year 1994 _journal_page_first 563 _journal_page_last 574 _publ_section_title ; Structural chemistry of synthetic cordierite: evidence for solid solutions and disordered compositional domains in Bi-flux-grown Mg-cordierites Sample: Crystallized from glass at 1050 degrees C for 18 hours Note: tetrahedral site occupancies are assumed, not refined ; _database_code_amcsd 0007853 _chemical_formula_sum 'Mg2 (Al4 Si5) O18' _cell_length_a 9.7815 _cell_length_b 9.7815 _cell_length_c 9.3537 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 775.042 _exptl_crystal_density_diffrn 2.507 _symmetry_space_group_name_H-M 'P 6/m c c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x,x-y,1/2-z' '-x+y,-x,-z' 'x-y,x,z' '-y,-x,1/2+z' 'y,x,1/2-z' 'y,-x+y,-z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x+y,y,1/2-z' 'x,y,-z' '-x,-y,z' 'x,x-y,1/2+z' '-x,-x+y,1/2-z' 'x-y,x,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,x-y,-z' 'y,-x+y,z' '-x+y,y,1/2+z' 'x-y,-y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv MgM 0.33333 0.66667 0.25000 1.00000 -0.00177 AlT1 0.50000 0.50000 0.25000 0.66667 0.00114 SiT1 0.50000 0.50000 0.25000 0.33333 0.00114 AlT2 0.37660 0.26710 0.00000 0.33333 0.00291 SiT2 0.37660 0.26710 0.00000 0.66667 0.00291 O1 0.48850 0.34890 0.14260 1.00000 -0.00355 O2 0.23000 0.30930 0.00000 1.00000 0.01267