data_global
_amcsd_formula_title 'Cl H4 N O4'
loop_
_publ_author_name
'Gottfried C'
'Schusterius C'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 84 
_journal_year 1932
_journal_page_first 65
_journal_page_last 73
_publ_section_title
;
 Die Struktur von Kalium- und Ammoniumperchlorat
 _cod_database_code 1010612
;
_database_code_amcsd 0017494
_chemical_formula_sum 'O4 Cl N'
_cell_length_a 9.202
_cell_length_b 5.815
_cell_length_c 7.449
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 398.593
_exptl_crystal_density_diffrn      1.891
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
O1   0.16900   0.25000   0.05000
O2   0.07800   0.25000   0.10000
O3   0.07500   0.04200   0.18100
Cl1   0.06700   0.25000   0.19400
N1   0.19700   0.25000   0.17200