data_global
_chemical_name_mineral 'Arcanite'
loop_
_publ_author_name
'McGinnety J A'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 28 
_journal_year 1972
_journal_page_first 2845
_journal_page_last 2852
_publ_section_title
;
 Redetermination of the structures of potassium sulphate and potassium chromate:
 the effect of electrostatic crystal forces upon observed bond length
;
_database_code_amcsd 0009456
_chemical_formula_sum 'K2 S O4'
_cell_length_a 7.476
_cell_length_b 10.071
_cell_length_c 5.763
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 433.901
_exptl_crystal_density_diffrn      2.668
_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   0.67377   0.41062   0.25000
K2  -0.01104   0.70406   0.25000
S   0.23298   0.41971   0.25000
O1   0.03790   0.41660   0.25000
O2   0.29630   0.55820   0.25000
O3   0.30090   0.35220   0.04120
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
K1 0.02322 0.02425 0.02142 -0.00065 0.00000 0.00000
K2 0.02024 0.01922 0.02265 0.00027 0.00000 0.00000
S 0.01569 0.01444 0.01457 -0.00011 0.00000 0.00000
O1 0.01812 0.03443 0.03348 -0.00343 0.00000 0.00000
O2 0.03228 0.01490 0.02743 -0.00687 0.00000 0.00000
O3 0.03794 0.02826 0.01868 0.00496 0.00437 -0.00706