data_global
_chemical_name_mineral 'Sudoite'
loop_
_publ_author_name
'Aleksandrova V A'
'Drits V A'
'Sokolova G V'
_journal_name_full 'Soviet Physics Crystallography'
_journal_volume 18 
_journal_year 1973
_journal_page_first 50
_journal_page_last 53
_publ_section_title
;
 Crystal structure of ditrioctahedral chlorite
;
_database_code_amcsd 0015561
_chemical_formula_sum 'Mg1.95 Al4.17 Si2.88 O18 H8'
_cell_length_a 5.225
_cell_length_b 9.058
_cell_length_c 28.380
_cell_angle_alpha 90
_cell_angle_beta 93.67
_cell_angle_gamma 90
_cell_volume 1340.416
_exptl_crystal_density_diffrn      2.660
_symmetry_space_group_name_H-M 'C 1 2/c 1'
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,-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
MgM1   0.75300   0.91400   0.00000   0.84000
AlM1   0.75300   0.91400   0.00000   0.16000
MgM2   0.75000   0.25000   0.00000   0.27000
AlM2   0.75000   0.25000   0.00000   0.73000
Al1   0.50000   0.25100   0.25000   1.00000
Al2   0.50000   0.91800   0.25000   1.00000
AlT1   0.65100   0.75000   0.15490   0.56000
SiT1   0.65100   0.75000   0.15490   0.44000
SiT2   0.65100   0.41800   0.15420   1.00000
O1   0.41600   0.32600   0.12980   1.00000
O2   0.58700   0.58000   0.13740   1.00000
O3  -0.09200   0.35000   0.13340   1.00000
O4   0.67200   0.41200   0.21200   1.00000
O5   0.67200   0.75600   0.21670   1.00000
O-H1   0.43500   0.26400   0.03570   1.00000
O-H2   0.44100   0.59400   0.04040   1.00000
O-H3   0.41900   0.90200   0.03600   1.00000
O-H4   0.13800   0.58600   0.21590   1.00000