data_1010892
_chemical_name_systematic          'Potassium peroxodisulfate'
_chemical_formula_structural       'K2 S2 O8'
_chemical_formula_sum              'K2 O8 S2'
_publ_section_title
;
The Crystal Structure of Potassium Persulfate K~2~ S~2~ O~8~
;
_publ_author_name                  'Keen, R C'
_journal_name_full
;
Zeitschrift fuer Kristallographie, Kristallgeometrie, Kristallphysik,
Kristallchemie (-144,1977)
;
_journal_coden_ASTM                ZEKGAX
_journal_volume                    91
_journal_year                      1935
_journal_page_first                129
_journal_page_last                 135
_cell_length_a                     5.1
_cell_length_b                     6.83
_cell_length_c                     5.4
_cell_angle_alpha                  106.9
_cell_angle_beta                   90.17
_cell_angle_gamma                  102.6
_cell_volume                       175.2
_cell_formula_units_Z              1
_symmetry_space_group_name_H-M     'P -1'
_symmetry_Int_Tables_number        2
_symmetry_cell_setting             triclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  K1+    1.000
  O1-   -1.000
  O2-   -2.000
  S6+    6.000
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
  K1    K1+    2 i 0.186 0.806 0.486 1.  0 d
  O1    O1-    2 i 0.086 0.089 0.069 1.  0 d
  O2    O2-    2 i 0.306 0.228 0.702 1.  0 d
  O3    O2-    2 i 0.534 0.236 0.097 1.  0 d
  O4    O2-    2 i 0.214 0.45 0.111 1.  0 d
  S1    S6+    2 i 0.258 0.241 0.019 1.  0 d