data_global
_chemical_name_mineral 'Mitscherlichite'
loop_
_publ_author_name
'Chrobak L'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 88 
_journal_year 1934
_journal_page_first 35
_journal_page_last 47
_publ_section_title
;
 Quantitative spectrometric studies of ammonium and of potassium cupric chloride
 dihydrate (NH4)2CuCl4*2H2O and K2CuCl4*2H2O
;
_database_code_amcsd 0010516
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Cu K2 O2 Cl4 H4'
_cell_length_a 7.45
_cell_length_b 7.45
_cell_length_c 7.88
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 437.360
_exptl_crystal_density_diffrn      2.427
_symmetry_space_group_name_H-M 'P 42/m n m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-y,-x,z'
  'y,x,-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'
  'x,y,-z'
  '-x,-y,z'
  'y,x,z'
  '-y,-x,-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'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Cu   0.00000   0.00000   0.00000
K   0.00000   0.50000   0.25000
O   0.00000   0.00000   0.24800
Cl1   0.22000   0.22000   0.00000
Cl2   0.22000   0.22000   0.50000
H   0.07600   0.07600   0.32200