data_global
_chemical_name_mineral 'Natrolite'
loop_
_publ_author_name
'Peacor D R'
_journal_name_full 'American Mineralogist'
_journal_volume 58 
_journal_year 1973
_journal_page_first 676
_journal_page_last 680
_publ_section_title
;
 High temperature, single-crystal X-Ray study of natrolite
 T = 198 C
;
_database_code_amcsd 0000375
_chemical_formula_sum 'Si3 Al2 Na2 O12 H4'
_cell_length_a 18.43
_cell_length_b 18.71
_cell_length_c 6.52
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2248.261
_exptl_crystal_density_diffrn      2.247
_symmetry_space_group_name_H-M 'F d d 2'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+y,z'
  '1/4+x,1/4-y,1/4+z'
  '1/4+x,3/4-y,3/4+z'
  '3/4+x,1/4-y,3/4+z'
  '3/4+x,3/4-y,1/4+z'
  '1/4-x,1/4+y,1/4+z'
  '1/4-x,3/4+y,3/4+z'
  '3/4-x,1/4+y,3/4+z'
  '3/4-x,3/4+y,1/4+z'
  '-x,1/2-y,1/2+z'
  '-x,-y,+z'
  '1/2-x,1/2-y,+z'
  '1/2-x,-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si1   0.00000   0.00000   0.00000   0.01039
Si2   0.15361   0.21116   0.62266   0.00925
Al   0.03772   0.09329   0.61584   0.00937
Na   0.22090   0.03110   0.61700   0.03014
O1   0.02300   0.06790   0.86590   0.02191
O2   0.07080   0.18120   0.60930   0.01330
O3   0.09860   0.03490   0.50020   0.02001
O4   0.20680   0.15310   0.72780   0.01950
O5   0.18080   0.22720   0.39090   0.02204
Wat   0.05740   0.18910   0.10980   0.04002