data_1011255
_chemical_name_systematic          'Sodium tecto-alumosilicate hydrate *'
_chemical_name_mineral             'Natrolite'
_chemical_formula_structural       'Na2 Al2 Si3 O10 (H2 O)2'
_chemical_formula_sum              'H4 Al2 Na2 O12 Si3'
_publ_section_title                'The structures of fibrous zeolites'
loop_
_publ_author_name
  'Taylor, W H'
  'Meek, C A'
  'Jackson, W W'
_journal_name_full
;
Zeitschrift fuer Kristallographie, Kristallgeometrie, Kristallphysik,
Kristallchemie (-144,1977)
;
_journal_coden_ASTM                ZEKGAX
_journal_volume                    84
_journal_year                      1933
_journal_page_first                373
_journal_page_last                 398
_cell_length_a                     18.29999(10000)
_cell_length_b                     18.59999(10000)
_cell_length_c                     6.57(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       2236.3
_cell_formula_units_Z              8
_exptl_crystal_density_meas        2.24
_symmetry_space_group_name_H-M     'F d d 2'
_symmetry_Int_Tables_number        43
_symmetry_cell_setting             orthorhombic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  '1/4-x,1/4+y,1/4+z'
  '1/4+x,1/4-y,1/4+z'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+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,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,3/4-y,3/4+z'
  '3/4+x,1/4-y,3/4+z'
  '3/4+x,3/4-y,1/4+z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  O2-   -2.000
  Si4+   4.000
  Al3+   3.000
  Na1+   1.000
  H1+    1.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  O1    O2-   16 b 0.069 0.181 0.125 1.  2 d
  O2    O2-   16 b 0.069 0.181 0.625 1.  0 d
  O3    O2-   16 b 0.014 0.067 0.875 1.  0 d
  O4    O2-   16 b 0.183 0.236 0.375 1.  0 d
  O5    O2-   16 b 0.097 0.042 0.5 1.  0 d
  O6    O2-   16 b 0.208 0.153 0.75 1.  0 d
  Si1   Si4+   8 a 0. 0. 0. 1.  0 d
  Si2   Si4+  16 b 0.153 0.208 0.625 1.  0 d
  Al1   Al3+  16 b 0.036 0.089 0.625 1.  0 d
  Na1   Na1+  16 b 0.222 0.028 0.625 1.  0 d
  H1    H1+   16 b -1. -1. -1. 2.  0 dum