data_global
_amcsd_formula_title 'Cl2 Cr2 H8 Hg N2 O7'
loop_
_publ_author_name
'Averbuch-Pouchot M'
'El-Horr N'
'Guitel J'
_journal_name_full 'Acta Crystallographica, Section C'
_journal_volume 40 
_journal_year 1984
_journal_page_first 725
_journal_page_last 728
_publ_section_title
;
 Structures of Mercury Dichloride - Dipotassium Dichromate (1/1),
 Hg Cl2 K2 Cr2 O7, and Mercury Dichloride - Diammonium Dichromate
 (1/1), Hg Cl2 ((N H4)2 Cr2 O7)
 _cod_database_code 1008241
;
_database_code_amcsd 0016163
_chemical_formula_sum 'Hg Cr2 Cl2 O7 N2'
_cell_length_a 14.891
_cell_length_b 7.604
_cell_length_c 9.620
_cell_angle_alpha 90
_cell_angle_beta 96.02
_cell_angle_gamma 90
_cell_volume 1083.277
_exptl_crystal_density_diffrn      3.161
_symmetry_space_group_name_H-M 'P 1 21/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Hg1   0.06039   0.11953   0.16122
Cr1   0.02560   0.37700   0.79050
Cr2   0.12200   0.30990   0.51910
Cl1   0.40420   0.37630   0.11190
Cl2   0.21630   0.10110   0.19920
O1   0.06500   0.44800   0.63140
O2   0.45550   0.28800   0.75190
O3   0.10890   0.32500   0.90090
O4   0.02650   0.46400   0.14900
O5   0.05130   0.17600   0.43330
O6   0.16900   0.43500   0.41450
O7   0.19870   0.19700   0.61180
N1   0.36390   0.31100   0.46700
N2   0.29260   0.10200   0.87700