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