data_global
_amcsd_formula_title 'Cl2 Cr2 Hg K2 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 1008240
;
_database_code_amcsd 0016162
_chemical_formula_sum 'Hg Cr2 K2 Cl2 O7'
_cell_length_a 12.372
_cell_length_b 10.438
_cell_length_c 8.191
_cell_angle_alpha 90
_cell_angle_beta 92.32
_cell_angle_gamma 90
_cell_volume 1056.910
_exptl_crystal_density_diffrn      3.555
_symmetry_space_group_name_H-M 'P 1 21/n 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Hg1   0.00000   0.00000   0.00000
Hg2   0.00000   0.00000   0.50000
Cr1   0.38640   0.16710   0.04370
Cr2   0.38970   0.16360   0.45370
K1   0.15860   0.32490   0.74850
K2   0.13010   0.34890   0.25150
Cl1   0.13810   0.02190   0.20340
Cl2   0.13770   0.01870   0.70340
O1   0.40410   0.11600   0.24900
O2  -0.00460   0.25500   0.49400
O3   0.28320   0.26100   0.02100
O4   0.37200   0.03600   0.93600
O5   0.49580   0.24800   0.50700
O6   0.38910   0.03500   0.55900
O7   0.28090   0.24300   0.47400