The structure described by K2SO4 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. In the second K site, K(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form KO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra and edges with two equivalent K(2)O6 octahedra. S(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SO4 tetrahedra that share corners with six equivalent K(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-53°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one S(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent K(2), and one S(1) atom. is represented by the CIF file [CIF]
data_K2SO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.824
_cell_length_b   5.824
_cell_length_c   8.030
_cell_angle_alpha   89.903
_cell_angle_beta   89.903
_cell_angle_gamma   117.637
_symmetry_Int_Tables_number   1
_cell_volume   241.252
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  K  K0  1  0.308  0.692  0.250  1.0
  K  K1  1  0.692  0.308  0.750  1.0
  K  K2  1  0.000  0.000  0.500  1.0
  K  K3  1  0.000  0.000  0.000  1.0
  S  S4  1  0.649  0.351  0.250  1.0
  S  S5  1  0.351  0.649  0.750  1.0
  O  O6  1  0.723  0.251  0.099  1.0
  O  O7  1  0.277  0.749  0.901  1.0
  O  O8  1  0.251  0.723  0.599  1.0
  O  O9  1  0.749  0.277  0.401  1.0
  O  O10  1  0.359  0.237  0.259  1.0
  O  O11  1  0.641  0.763  0.741  1.0
  O  O12  1  0.237  0.359  0.759  1.0
  O  O13  1  0.763  0.641  0.241  1.0
[/CIF]
.
The structure described by K2SO4 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. In the second K site, K(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form KO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra and edges with two equivalent K(2)O6 octahedra. S(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SO4 tetrahedra that share corners with six equivalent K(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-53°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one S(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent K(2), and one S(1) atom. is represented by the CIF file [CIF]
data_K2SO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.824
_cell_length_b   5.824
_cell_length_c   8.030
_cell_angle_alpha   89.903
_cell_angle_beta   89.903
_cell_angle_gamma   117.637
_symmetry_Int_Tables_number   1
_cell_volume   241.252
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  K  K0  1  0.308  0.692  0.250  1.0
  K  K1  1  0.692  0.308  0.750  1.0
  K  K2  1  0.000  0.000  0.500  1.0
  K  K3  1  0.000  0.000  0.000  1.0
  S  S4  1  0.649  0.351  0.250  1.0
  S  S5  1  0.351  0.649  0.750  1.0
  O  O6  1  0.723  0.251  0.099  1.0
  O  O7  1  0.277  0.749  0.901  1.0
  O  O8  1  0.251  0.723  0.599  1.0
  O  O9  1  0.749  0.277  0.401  1.0
  O  O10  1  0.359  0.237  0.259  1.0
  O  O11  1  0.641  0.763  0.741  1.0
  O  O12  1  0.237  0.359  0.759  1.0
  O  O13  1  0.763  0.641  0.241  1.0
[/CIF]
.