data_1010092
_chemical_name_systematic          'Ammonium nitrate - II'
_chemical_formula_structural       'N H4 N O3'
_chemical_formula_sum              'H4 N2 O3'
_publ_section_title
;
Molecular Rotation in the Solid State. The Variation of the Crystal
Structure of Ammonium Nitrate with Temperature
;
loop_
_publ_author_name
  'Hendricks, S B'
  'Posnjak, E'
  'Kracek, F C'
_journal_name_full                 'Journal of the American Chemical Society'
_journal_coden_ASTM                JACSAT
_journal_volume                    54
_journal_year                      1932
_journal_page_first                2766
_journal_page_last                 2786
_cell_length_a                     5.74
_cell_length_b                     5.74
_cell_length_c                     5.
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       164.7
_cell_formula_units_Z              2
_exptl_crystal_density_meas        1.64
_symmetry_space_group_name_H-M     'P -4'
_symmetry_Int_Tables_number        81
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  'y,-x,-z'
  '-y,x,-z'