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 NOR225
 Note: T = 225 C
;
_database_code_amcsd 0018533
_chemical_compound_source 'Fauske, Nordland, Norway'
_chemical_formula_sum 'Si6 Mg3.84 O19 H6'
_cell_length_a 13.3765
_cell_length_b 27.0850
_cell_length_c 5.2757
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1911.399
_exptl_crystal_density_diffrn      1.987
_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   0.20160   0.02830   0.58500   1.00000   0.01570
Si2   0.20540   0.14100   0.57100   1.00000   0.01570
Si3   0.20260   0.19610   0.07500   1.00000   0.01570
Mg1   0.00000   0.03140   0.25000   0.96000   0.01355
Mg2   0.00000   0.08830   0.75000   0.96000   0.01355
Mg3   0.00000   0.14650   0.25000   0.96000   0.01355
Mg4   0.00000   0.20210   0.75000   0.96000   0.01355
O9   0.25000   0.25000   0.07900   1.00000   0.01482
O1   0.08500   0.02830   0.59600   1.00000   0.01482
O3   0.07870   0.14300   0.57800   1.00000   0.01482
O4   0.08690   0.19800   0.05700   1.00000   0.01482
O5   0.24630   0.00310   0.33100   1.00000   0.01482
O6   0.24360   0.08770   0.60200   1.00000   0.01482
O7   0.25120   0.16690   0.31800   1.00000   0.01482
O8   0.26420   0.17120   0.79400   1.00000   0.01482
O-H2   0.08460   0.08460   0.08400   1.00000   0.01482
Wat10   0.08070   0.25830   0.56100   1.00000   0.01482