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 BAT225
 Note: T = 225 C
;
_database_code_amcsd 0018529
_chemical_compound_source 'Batallones, Madrid, Spain'
_chemical_formula_sum 'Si6 Mg3.592 O19 H6'
_cell_length_a 13.2608
_cell_length_b 27.0559
_cell_length_c 5.2671
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1889.745
_exptl_crystal_density_diffrn      1.989
_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   0.19170   0.02960   0.58300   1.00000   0.00570
Si2   0.20610   0.14210   0.56400   1.00000   0.00570
Si3   0.21310   0.19430   0.07300   1.00000   0.00570
Mg1   0.00000   0.02280   0.25000   0.89800   0.01684
Mg2   0.00000   0.09030   0.75000   0.89800   0.01684
Mg3   0.00000   0.14820   0.25000   0.89800   0.01684
Mg4   0.00000   0.20230   0.75000   0.89800   0.01684
O9   0.25000   0.25000   0.10300   1.00000   0.01406
O1   0.09150   0.02620   0.57600   1.00000   0.01406
O3   0.07590   0.14900   0.56000   1.00000   0.01406
O4   0.11020   0.19680   0.07800   1.00000   0.01406
O5   0.26270   0.00530   0.34400   1.00000   0.01406
O6   0.23630   0.09330   0.58200   1.00000   0.01406
O7   0.26550   0.16480   0.32600   1.00000   0.01406
O8   0.26760   0.16720   0.78700   1.00000   0.01406
O-H2   0.08090   0.08630   0.07000   1.00000   0.01406
Wat10   0.06070   0.25200   0.59800   1.00000   0.01406