data_global
_chemical_name_mineral 'Sepiolite'
loop_
_publ_author_name
'Sanchez M'
'Garcia-Romero E'
'Suarez M'
'Silva I'
'Fuentes-Montero L'
'Martinez-Criado G'
_journal_name_full 'American Mineralogist'
_journal_volume 96 
_journal_year 2011
_journal_page_first 1443
_journal_page_last 1454
_publ_section_title
;
 Variability in sepiolite: Diffraction studies
 Note: Sample BAT25
 Note: T = 25 C
;
_database_code_amcsd 0018530
_chemical_compound_source 'Batallones, Madrid, Spain'
_chemical_formula_sum 'Si6 Mg3.592 O22 H12'
_cell_length_a 13.3067
_cell_length_b 26.9720
_cell_length_c 5.2664
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1890.155
_exptl_crystal_density_diffrn      2.178
_symmetry_space_group_name_H-M 'P n c n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,1/2+y,-z'
  '1/2-x,1/2-y,z'
  'x,-y,1/2+z'
  '-x,y,1/2-z'
  '-x,-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
Si1   0.19700   0.02650   0.58000   1.00000   0.01507
Si2   0.21460   0.13990   0.57000   1.00000   0.01507
Si3   0.20730   0.19400   0.06600   1.00000   0.01507
Mg1   0.00000   0.02740   0.25000   0.89800   0.02052
Mg2   0.00000   0.09200   0.75000   0.89800   0.02052
Mg3   0.00000   0.14630   0.25000   0.89800   0.02052
Mg4   0.00000   0.20310   0.75000   0.89800   0.02052
O9   0.25000   0.25000   0.08800   1.00000   0.01507
O1   0.06750   0.02030   0.57800   1.00000   0.01507
O3   0.05990   0.13780   0.57100   1.00000   0.01507
O4   0.09590   0.19170   0.02400   1.00000   0.01507
O5   0.25310  -0.00100   0.34500   1.00000   0.01507
O6   0.25550   0.07510   0.59100   1.00000   0.01507
O7   0.26400   0.16190   0.27100   1.00000   0.01507
O8   0.32310   0.16190   0.81800   1.00000   0.01507
O-H2   0.09420   0.08470   0.08000   1.00000   0.01507
Wat10   0.07450   0.26170   0.53800   1.00000   0.01507
Wat1   0.07190   0.42950   0.11100   0.75000   0.06789
Wat2   0.00000   0.62480   0.25000   0.75000   0.06789
Wat3   0.00000   0.47800   0.25000   0.75000   0.06789