data_global
_chemical_name_mineral 'Archerite'
loop_
_publ_author_name
'West J'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 74 
_journal_year 1930
_journal_page_first 306
_journal_page_last 335
_publ_section_title
;
 A quantitative X-ray analysis of the structure of potassium dihydrogen
 phosphate (KH2PO4)
 _cod_database_code 1010458
;
_database_code_amcsd 0017377
_chemical_formula_sum 'K P O4 H2'
_cell_length_a 7.43
_cell_length_b 7.43
_cell_length_c 6.97
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 384.778
_exptl_crystal_density_diffrn      2.349
_symmetry_space_group_name_H-M 'I -4 2 d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-y,-x,3/4+z'
  '-y,1/2-x,1/4+z'
  'y,-x,-z'
  '1/2+y,1/2-x,1/2-z'
  '-x,1/2+y,1/4-z'
  '1/2-x,+y,3/4-z'
  '-x,-y,z'
  '1/2-x,1/2-y,1/2+z'
  '1/2+y,x,3/4+z'
  '+y,1/2+x,1/4+z'
  '-y,x,-z'
  '1/2-y,1/2+x,1/2-z'
  'x,1/2-y,1/4-z'
  '1/2+x,-y,3/4-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
K1   0.00000   0.00000   0.50000
P1   0.00000   0.00000   0.00000
O1   0.14400   0.08100   0.13900
H1   0.14500   0.25000   0.12500