data_1011129
_chemical_name_systematic          'Ammonium chloride - $-alpha'
_chemical_name_mineral             'Sa'
_chemical_compound_source          'ammoniac - synthetic'
_chemical_formula_structural       '(N H4) Cl'
_chemical_formula_sum              'H4 Cl N'
_publ_section_title
;
The crystal structure of the ammonium halides above and below the
transition temperature
;
loop_
_publ_author_name
  'Bartlett, G'
  'Langmuir, I'
_journal_name_full                 'Journal of the American Chemical Society'
_journal_coden_ASTM                JACSAT
_journal_volume                    43
_journal_year                      1921
_journal_page_first                84
_journal_page_last                 91
_cell_length_a                     3.868
_cell_length_b                     3.868
_cell_length_c                     3.868
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       57.9
_cell_formula_units_Z              1
_exptl_crystal_density_meas        1.52
_symmetry_space_group_name_H-M     'P m -3 m'
_symmetry_Int_Tables_number        221
_symmetry_cell_setting             cubic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'y,z,x'
  'z,x,y'
  'x,z,y'
  'y,x,z'
  'z,y,x'
  'x,-y,-z'
  'y,-z,-x'
  'z,-x,-y'
  'x,-z,-y'
  'y,-x,-z'
  'z,-y,-x'
  '-x,y,-z'
  '-y,z,-x'
  '-z,x,-y'
  '-x,z,-y'
  '-y,x,-z'
  '-z,y,-x'
  '-x,-y,z'
  '-y,-z,x'
  '-z,-x,y'
  '-x,-z,y'
  '-y,-x,z'
  '-z,-y,x'
  '-x,-y,-z'
  '-y,-z,-x'
  '-z,-x,-y'
  '-x,-z,-y'
  '-y,-x,-z'
  '-z,-y,-x'
  '-x,y,z'
  '-y,z,x'
  '-z,x,y'
  '-x,z,y'
  '-y,x,z'
  '-z,y,x'
  'x,-y,z'
  'y,-z,x'
  'z,-x,y'
  'x,-z,y'
  'y,-x,z'
  'z,-y,x'
  'x,y,-z'
  'y,z,-x'
  'z,x,-y'
  'x,z,-y'
  'y,x,-z'
  'z,y,-x'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  N3-   -3.000
  Cl1-  -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
  N1    N3-    1 a 0. 0. 0. 1.  4 d
  Cl1   Cl1-   1 b 0.5 0.5 0.5 1.  0 d
  H1    H1+    6 e -1. -1. -1. 0.667  0 dum