data_global
_chemical_name_mineral 'Natrolite'
loop_
_publ_author_name
'Krogh Andersen E'
'Krogh Andersen I G'
'Ploug-Sorensen G'
_journal_name_full 'European Journal of Mineralogy'
_journal_volume 2 
_journal_year 1990
_journal_page_first 799
_journal_page_last 807
_publ_section_title
;
 Disorder in natrolites: structure determinations of three disordered natrolites and
 one lithium-exchanged disordered natrolite
 Example: Li II
;
_database_code_amcsd 0006402
_chemical_formula_sum 'Na2 Al2 Si3 O12 H4'
_cell_length_a 17.704
_cell_length_b 18.540
_cell_length_c 6.495
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2131.868
_exptl_crystal_density_diffrn      2.369
_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
Na   0.21741   0.04133   0.62911   0.02850
Al   0.03634   0.09378   0.61732   0.00811
Si1   0.00000   0.00000   0.00000   0.01013
Si2   0.14928   0.21576   0.62275   0.00963
O1   0.01118   0.07259   0.86229   0.02014
O2   0.06507   0.18149   0.60570   0.01532
O3   0.10470   0.03534   0.52832   0.01697
O4   0.20910   0.15562   0.70626   0.01722
O5   0.17395   0.24112   0.39022   0.01950
O6   0.04165   0.20075   0.11604   0.02786
H1   0.04090   0.15950   0.02110   0.02533
H2   0.09090   0.19730   0.15790   0.02533