data_global
_chemical_name_mineral 'Metanatrolite'
loop_
_publ_author_name
'Baur W H'
'Joswig W'
_journal_name_full 'Neues Jahrbuch fur Mineralogie, Monatshefte'
_journal_volume 1996 
_journal_year 1996
_journal_page_first 171
_journal_page_last 187
_publ_section_title
;
 The phases of natrolite occurring during dehydration and rehydration studied
 by single crystal X-ray diffraction methods between room temperature and 923 K
 Sample: T = 773 K, crystal II, "metanatrolite"
;
_database_code_amcsd 0014890
_chemical_compound_source 'Khibiny, Kola peninsula, Russia'
_chemical_formula_sum 'Na1.74 Al2 Si3 O10'
_cell_length_a 16.736
_cell_length_b 17.622
_cell_length_c 6.4649
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90.0
_cell_volume 1906.640
_exptl_crystal_density_diffrn      2.356
_symmetry_space_group_name_H-M 'F 1 1 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'
  '-x,-y,z'
  '-x,1/2-y,1/2+z'
  '1/2-x,-y,1/2+z'
  '1/2-x,1/2-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
Na1   0.05000   0.18310   0.14410   0.92000   0.19600
Na2   0.29420   0.05830   0.37400   0.41000   0.16800
Na21   0.25230   0.07140   0.41500   0.41000   0.06400
Al11   0.03190   0.10080   0.60830   1.00000   0.04370
Al12   0.27540   0.14680   0.85940   1.00000   0.04120
Si11   0.00000   0.00000  -0.01290   1.00000   0.04110
Si12   0.25000   0.25000   0.24280   1.00000   0.04590
Si21   0.14120   0.22750   0.61520   1.00000   0.03870
Si22   0.10690  -0.02590   0.36270   1.00000   0.04330
O11   0.03690   0.06870   0.85440   1.00000   0.06500
O12   0.24910   0.17330   0.11120   1.00000   0.06600
O21   0.04710   0.20210   0.60430   1.00000   0.05600
O22   0.19780  -0.05320   0.34680   1.00000   0.05100
O31   0.09920   0.06250   0.43000   1.00000   0.04800
O32   0.14720   0.29660   0.76340   1.00000   0.06600
O41   0.06620  -0.08110   0.51650   1.00000   0.06000
O42   0.19820   0.15960   0.69180   1.00000   0.06600
O51   0.07040  -0.03510   0.12980   1.00000   0.07400
O52   0.17240   0.25350   0.38750   1.00000   0.07200