data_global _chemical_name_mineral 'Cordierite' 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: Synthesized in 10 at% bismuth oxide flux at 1000 C for 12 hours Note: tetrahedral site occupancies are assumed, not refined ; _database_code_amcsd 0007857 _chemical_formula_sum 'Mg2 Al4 Si5 O18 Bi.144' _cell_length_a 17.0409 _cell_length_b 9.7382 _cell_length_c 9.3285 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1548.043 _exptl_crystal_density_diffrn 2.639 _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_occupancy _atom_site_U_iso_or_equiv MgM 0.33760 0.00000 0.25000 1.00000 0.01381 AlT11 0.25000 0.25000 0.25260 1.00000 0.01001 SiT16 0.00000 0.50000 0.25000 1.00000 0.01102 SiT21 0.19150 0.07950 0.00000 1.00000 0.01077 SiT23 0.13480 -0.23810 0.00000 1.00000 0.00937 AlT26 0.04970 0.31000 0.00000 1.00000 0.00874 O11 0.24730 -0.10380 0.35810 1.00000 0.01229 O16 0.06330 -0.41630 0.34850 1.00000 0.01127 O13 -0.17330 -0.31070 0.35810 1.00000 0.01039 O26 0.04200 -0.25040 0.00000 1.00000 0.01811 O21 0.12010 0.18810 0.00000 1.00000 0.01836 O23 0.16390 -0.08030 0.00000 1.00000 0.01608 BiC1 0.00000 0.00000 0.25000 0.10500 0.15198 BiC2 0.00000 0.00000 0.00000 0.03900 0.10132