data_global
_chemical_name_mineral 'Arcanite'
loop_
_publ_author_name
'Robinson M'
_journal_name_full 'Journal of Physical Chemistry'
_journal_volume 62 
_journal_year 1958
_journal_page_first 925
_journal_page_last 928
_publ_section_title
;
 The crystal structures of beta-K2SO4 and of beta-K2PO3F
 _cod_database_code 1200011
;
_database_code_amcsd 0018287
_chemical_formula_sum 'K2 S O4'
_cell_length_a 7.456
_cell_length_b 10.08
_cell_length_c 5.776
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 434.104
_exptl_crystal_density_diffrn      2.666
_symmetry_space_group_name_H-M 'P n a m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,y,1/2-z'
  '-x,-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-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
K1   0.17680   0.08180   0.25000
K2  -0.01150   0.70460   0.25000
S1   0.23580   0.41550   0.25000
O1   0.03150   0.40320   0.25000
O2   0.29700   0.55790   0.25000
O3   0.29970   0.34840   0.04100