data_1001200
_chemical_name_systematic          'Lead chloride oxide (4/2/4)'
_chemical_formula_structural       'Pb4 Cl2 O4'
_chemical_formula_analytical       'Pb3.6 Cl1.8 O4'
_chemical_formula_sum              'Cl2 O4 Pb4'
_publ_section_title                'Sur la synthese d'un oxychlorure de plomb'
_publ_author_name                  'Gasperin, M'
_journal_name_full
;
Bulletin de la Societe Francaise de Mineralogie et de Cristallographie
(72,1949-100,1977)
;
_journal_coden_ASTM                BUFCAE
_journal_volume                    87
_journal_year                      1964
_journal_page_first                278
_journal_page_last                 280
_cell_length_a                     3.91
_cell_length_b                     3.91
_cell_length_c                     13.
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       198.7
_cell_formula_units_Z              1
_exptl_crystal_density_meas        7.33
_symmetry_space_group_name_H-M     'I 4/m m m'
_symmetry_Int_Tables_number        139
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  '-x,y,z'
  'x,-y,z'
  '-y,x,z'
  'y,-x,z'
  'y,x,z'
  '-y,-x,z'
  '-x,-y,-z'
  'x,y,-z'
  'x,-y,-z'
  '-x,y,-z'
  'y,-x,-z'
  '-y,x,-z'
  '-y,-x,-z'
  'y,x,-z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-y,1/2+x,1/2+z'
  '1/2+y,1/2-x,1/2+z'
  '1/2+y,1/2+x,1/2+z'
  '1/2-y,1/2-x,1/2+z'
  '1/2-x,1/2-y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2+x,1/2-y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '1/2+y,1/2-x,1/2-z'
  '1/2-y,1/2+x,1/2-z'
  '1/2-y,1/2-x,1/2-z'
  '1/2+y,1/2+x,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Pb2+   2.500
  O2-   -2.000
  Cl1-  -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
  Pb1   Pb2+   4 e 0. 0. 0.150(2) 1.  0 d
  O1    O2-    4 d 0. 0.5 0.25 1.  0 d
  Cl1   Cl1-   2 b 0. 0. 0.5 1.  0 d