data_global
_chemical_name_mineral 'Palygorskite'
loop_
_publ_author_name
'Post J E'
'Heaney P J'
_journal_name_full 'American Mineralogist'
_journal_volume 93 
_journal_year 2008
_journal_page_first 667
_journal_page_last 675
_publ_section_title
;
 Synchotron powder X-ray diffraction study of the structure and dehydration
 behavior of palygorskite
 Sample: T = 100 K
;
_database_code_amcsd 0004563
_chemical_compound_source 'Yulu River, Korea'
_chemical_formula_sum 'Al1.1 Mg Si3.9 O14.92 H8.84'
_cell_length_a 13.179
_cell_length_b 17.852
_cell_length_c 5.2316
_cell_angle_alpha 90
_cell_angle_beta 107.77
_cell_angle_gamma 90
_cell_volume 1172.122
_exptl_crystal_density_diffrn      2.330
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  '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'
  '-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
AlM1   0.00000   0.08080   0.50000   1.00000   0.01700
MgM2   0.00000   0.16780   0.00000   1.00000   0.01700
Si1   0.21400   0.08450   0.97200   0.97500   0.01700
Al1   0.21400   0.08450   0.97200   0.02500   0.01700
Si2   0.20810   0.16400   0.47600   0.97500   0.01700
Al2   0.20810   0.16400   0.47600   0.02500   0.01700
O-H   0.06900   0.00000   0.37100   1.00000   0.01000
O2   0.08900   0.08690   0.87300   1.00000   0.01000
O3   0.08000   0.16000   0.41400   1.00000   0.01000
Wat4   0.09600   0.25150   0.91600   1.00000   0.01000
O5   0.25000   0.25000   0.50000   1.00000   0.01000
O6   0.25200   0.00000   0.97300   1.00000   0.01000
O7   0.26100   0.13210   0.25300   1.00000   0.01000
O8   0.27100   0.12760   0.76800   1.00000   0.01000
Wat1   0.44600   0.00000   0.68400   0.92000   0.16000
Wat2   0.50000   0.15220   0.50000   1.00000   0.05000