The crystal structure described by K2Zn(SO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and two equivalent O(6) atoms. Zn(1) is bonded to one O(1), one O(3), one O(5), one O(7), and one O(8) atom to form ZnO5 trigonal bipyramids that share corners with two equivalent S(1)O4 tetrahedra and corners with three equivalent S(2)O4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(3), one O(4), one O(6), and one O(8) atom to form SO4 tetrahedra that share corners with two equivalent Zn(1)O5 trigonal bipyramids. In the second S site, S(2) is bonded to one O(1), one O(2), one O(5), and one O(7) atom to form SO4 tetrahedra that share corners with three equivalent Zn(1)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one S(1) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one K(2), one Zn(1), and one S(2) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one S(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one S(1) atom. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zn(1), and one S(2) atom. In the seventh O site, O(6) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(1) atom. In the eighth O site, O(7) is bonded in a 2-coordinate geometry to one K(1), one Zn(1), and one S(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Zn(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.943
_cell_length_b   5.443
_cell_length_c   17.069
_cell_angle_alpha   73.219
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   795.511
_cell_formula_units_Z   4
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  0.856  0.005  0.728  1.0
  K  K1  1  0.826  0.787  0.477  1.0
  K  K2  1  0.356  0.995  0.772  1.0
  K  K3  1  0.674  0.787  0.977  1.0
  K  K4  1  0.144  0.995  0.272  1.0
  K  K5  1  0.174  0.213  0.523  1.0
  K  K6  1  0.326  0.213  0.023  1.0
  K  K7  1  0.644  0.005  0.228  1.0
  Zn  Zn8  1  0.030  0.616  0.130  1.0
  Zn  Zn9  1  0.970  0.384  0.870  1.0
  Zn  Zn10  1  0.470  0.616  0.630  1.0
  Zn  Zn11  1  0.530  0.384  0.370  1.0
  S  S12  1  0.384  0.588  0.177  1.0
  S  S13  1  0.890  0.182  0.072  1.0
  S  S14  1  0.116  0.588  0.677  1.0
  S  S15  1  0.610  0.182  0.572  1.0
  S  S16  1  0.110  0.818  0.928  1.0
  S  S17  1  0.390  0.818  0.428  1.0
  S  S18  1  0.884  0.412  0.323  1.0
  S  S19  1  0.616  0.412  0.823  1.0
  O  O20  1  0.618  0.182  0.485  1.0
  O  O21  1  0.235  0.671  0.908  1.0
  O  O22  1  0.046  0.602  0.755  1.0
  O  O23  1  0.379  0.321  0.172  1.0
  O  O24  1  0.963  0.708  0.910  1.0
  O  O25  1  0.532  0.241  0.892  1.0
  O  O26  1  0.032  0.759  0.608  1.0
  O  O27  1  0.265  0.671  0.408  1.0
  O  O28  1  0.380  0.094  0.375  1.0
  O  O29  1  0.765  0.329  0.092  1.0
  O  O30  1  0.120  0.094  0.875  1.0
  O  O31  1  0.954  0.398  0.245  1.0
  O  O32  1  0.454  0.602  0.255  1.0
  O  O33  1  0.537  0.708  0.410  1.0
  O  O34  1  0.620  0.906  0.625  1.0
  O  O35  1  0.880  0.906  0.125  1.0
  O  O36  1  0.774  0.309  0.822  1.0
  O  O37  1  0.468  0.759  0.108  1.0
  O  O38  1  0.274  0.691  0.678  1.0
  O  O39  1  0.621  0.679  0.828  1.0
  O  O40  1  0.121  0.321  0.672  1.0
  O  O41  1  0.735  0.329  0.592  1.0
  O  O42  1  0.546  0.398  0.745  1.0
  O  O43  1  0.463  0.292  0.590  1.0
  O  O44  1  0.118  0.818  0.015  1.0
  O  O45  1  0.968  0.241  0.392  1.0
  O  O46  1  0.879  0.679  0.328  1.0
  O  O47  1  0.882  0.182  0.985  1.0
  O  O48  1  0.226  0.691  0.178  1.0
  O  O49  1  0.382  0.818  0.515  1.0
  O  O50  1  0.726  0.309  0.322  1.0
  O  O51  1  0.037  0.292  0.090  1.0
[/CIF]
.
The crystal structure described by K2Zn(SO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), one O(8), and two equivalent O(4) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and two equivalent O(6) atoms. Zn(1) is bonded to one O(1), one O(3), one O(5), one O(7), and one O(8) atom to form ZnO5 trigonal bipyramids that share corners with two equivalent S(1)O4 tetrahedra and corners with three equivalent S(2)O4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(3), one O(4), one O(6), and one O(8) atom to form SO4 tetrahedra that share corners with two equivalent Zn(1)O5 trigonal bipyramids. In the second S site, S(2) is bonded to one O(1), one O(2), one O(5), and one O(7) atom to form SO4 tetrahedra that share corners with three equivalent Zn(1)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one S(1) atom. In the second O site, O(1) is bonded in a 3-coordinate geometry to one K(2), one Zn(1), and one S(2) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one S(2) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one S(1) atom. In the fifth O site, O(4) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(1) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zn(1), and one S(2) atom. In the seventh O site, O(6) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(1) atom. In the eighth O site, O(7) is bonded in a 2-coordinate geometry to one K(1), one Zn(1), and one S(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2Zn(SO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.943
_cell_length_b   5.443
_cell_length_c   17.069
_cell_angle_alpha   73.219
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   795.511
_cell_formula_units_Z   4
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  0.856  0.005  0.728  1.0
  K  K1  1  0.826  0.787  0.477  1.0
  K  K2  1  0.356  0.995  0.772  1.0
  K  K3  1  0.674  0.787  0.977  1.0
  K  K4  1  0.144  0.995  0.272  1.0
  K  K5  1  0.174  0.213  0.523  1.0
  K  K6  1  0.326  0.213  0.023  1.0
  K  K7  1  0.644  0.005  0.228  1.0
  Zn  Zn8  1  0.030  0.616  0.130  1.0
  Zn  Zn9  1  0.970  0.384  0.870  1.0
  Zn  Zn10  1  0.470  0.616  0.630  1.0
  Zn  Zn11  1  0.530  0.384  0.370  1.0
  S  S12  1  0.384  0.588  0.177  1.0
  S  S13  1  0.890  0.182  0.072  1.0
  S  S14  1  0.116  0.588  0.677  1.0
  S  S15  1  0.610  0.182  0.572  1.0
  S  S16  1  0.110  0.818  0.928  1.0
  S  S17  1  0.390  0.818  0.428  1.0
  S  S18  1  0.884  0.412  0.323  1.0
  S  S19  1  0.616  0.412  0.823  1.0
  O  O20  1  0.618  0.182  0.485  1.0
  O  O21  1  0.235  0.671  0.908  1.0
  O  O22  1  0.046  0.602  0.755  1.0
  O  O23  1  0.379  0.321  0.172  1.0
  O  O24  1  0.963  0.708  0.910  1.0
  O  O25  1  0.532  0.241  0.892  1.0
  O  O26  1  0.032  0.759  0.608  1.0
  O  O27  1  0.265  0.671  0.408  1.0
  O  O28  1  0.380  0.094  0.375  1.0
  O  O29  1  0.765  0.329  0.092  1.0
  O  O30  1  0.120  0.094  0.875  1.0
  O  O31  1  0.954  0.398  0.245  1.0
  O  O32  1  0.454  0.602  0.255  1.0
  O  O33  1  0.537  0.708  0.410  1.0
  O  O34  1  0.620  0.906  0.625  1.0
  O  O35  1  0.880  0.906  0.125  1.0
  O  O36  1  0.774  0.309  0.822  1.0
  O  O37  1  0.468  0.759  0.108  1.0
  O  O38  1  0.274  0.691  0.678  1.0
  O  O39  1  0.621  0.679  0.828  1.0
  O  O40  1  0.121  0.321  0.672  1.0
  O  O41  1  0.735  0.329  0.592  1.0
  O  O42  1  0.546  0.398  0.745  1.0
  O  O43  1  0.463  0.292  0.590  1.0
  O  O44  1  0.118  0.818  0.015  1.0
  O  O45  1  0.968  0.241  0.392  1.0
  O  O46  1  0.879  0.679  0.328  1.0
  O  O47  1  0.882  0.182  0.985  1.0
  O  O48  1  0.226  0.691  0.178  1.0
  O  O49  1  0.382  0.818  0.515  1.0
  O  O50  1  0.726  0.309  0.322  1.0
  O  O51  1  0.037  0.292  0.090  1.0
[/CIF]
.