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: Na III
;
_database_code_amcsd 0006401
_chemical_formula_sum 'Na2 Al2 Si3 O12 H4'
_cell_length_a 18.367
_cell_length_b 18.583
_cell_length_c 6.599
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2252.331
_exptl_crystal_density_diffrn      2.243
_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   0.22082   0.03022   0.62050   0.01925
Al   0.03778   0.09408   0.61794   0.00684
Si1   0.00000   0.00000   0.00000   0.00912
Si2   0.15402   0.21145   0.62497   0.00811
O1   0.02289   0.06952   0.86443   0.01811
O2   0.07029   0.18096   0.61588   0.01153
O3   0.09798   0.03609   0.50568   0.01558
O4   0.20849   0.15283   0.73077   0.01621
O5   0.17991   0.22730   0.39080   0.01798
O6   0.05675   0.19050   0.11679   0.02558
H1   0.05567   0.15061   0.06727   0.02533
H2   0.09284   0.19371   0.16636   0.02533