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 5 at% bismuth oxide flux at 1000 C for 12 hours
 Note: tetrahedral site occupancies are assumed, not refined
;
_database_code_amcsd 0007856
_chemical_formula_sum 'Mg2 Al4 Si5 O18 Bi.116'
_cell_length_a 17.0299
_cell_length_b 9.7424
_cell_length_c 9.3481
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1550.963
_exptl_crystal_density_diffrn      2.609
_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   0.33690   0.00000   0.25000   1.00000   0.01153
AlT11   0.25000   0.25000   0.25250   1.00000   0.00925
SiT16   0.00000   0.50000   0.25000   1.00000   0.01064
SiT21   0.19140   0.08030   0.00000   1.00000   0.01089
SiT23   0.13430  -0.23800   0.00000   1.00000   0.01039
AlT26   0.04990   0.31060   0.00000   1.00000   0.00684
O11   0.24700  -0.10370   0.35840   1.00000   0.01317
O16   0.06370  -0.41630   0.34920   1.00000   0.00975
O13  -0.17350  -0.31080   0.35780   1.00000   0.01115
O26   0.04200  -0.25080   0.00000   1.00000   0.01849
O21   0.11990   0.18830   0.00000   1.00000   0.01836
O23   0.16330  -0.08120   0.00000   1.00000   0.01659
BiC1   0.00000   0.00000   0.25000   0.08400   0.16465
BiC2   0.00000   0.00000   0.00000   0.03200   0.10132