The compound described by K2SO4 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to four equivalent O(1) and six equivalent O(2) atoms. In the second K site, K(2) is bonded to two equivalent O(2) and four equivalent O(1) 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 38-49°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), 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   5.749
_cell_length_b   5.749
_cell_length_c   7.867
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.417
_symmetry_Int_Tables_number   1
_cell_volume   228.663
_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  0.310  0.690  0.750  1.0
  K  K1  1  0.000  0.000  0.000  1.0
  K  K2  1  0.000  0.000  0.500  1.0
  K  K3  1  0.690  0.310  0.250  1.0
  S  S4  1  0.348  0.652  0.250  1.0
  S  S5  1  0.652  0.348  0.750  1.0
  O  O6  1  0.230  0.359  0.250  1.0
  O  O7  1  0.262  0.738  0.403  1.0
  O  O8  1  0.262  0.738  0.097  1.0
  O  O9  1  0.641  0.770  0.250  1.0
  O  O10  1  0.359  0.230  0.750  1.0
  O  O11  1  0.738  0.262  0.597  1.0
  O  O12  1  0.738  0.262  0.903  1.0
  O  O13  1  0.770  0.641  0.750  1.0
[/CIF]
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The compound described by K2SO4 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to four equivalent O(1) and six equivalent O(2) atoms. In the second K site, K(2) is bonded to two equivalent O(2) and four equivalent O(1) 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 38-49°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), 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   5.749
_cell_length_b   5.749
_cell_length_c   7.867
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   118.417
_symmetry_Int_Tables_number   1
_cell_volume   228.663
_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  0.310  0.690  0.750  1.0
  K  K1  1  0.000  0.000  0.000  1.0
  K  K2  1  0.000  0.000  0.500  1.0
  K  K3  1  0.690  0.310  0.250  1.0
  S  S4  1  0.348  0.652  0.250  1.0
  S  S5  1  0.652  0.348  0.750  1.0
  O  O6  1  0.230  0.359  0.250  1.0
  O  O7  1  0.262  0.738  0.403  1.0
  O  O8  1  0.262  0.738  0.097  1.0
  O  O9  1  0.641  0.770  0.250  1.0
  O  O10  1  0.359  0.230  0.750  1.0
  O  O11  1  0.738  0.262  0.597  1.0
  O  O12  1  0.738  0.262  0.903  1.0
  O  O13  1  0.770  0.641  0.750  1.0
[/CIF]
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