The material described by KZn2H(PO4)2 crystallizes in the triclinic P-1 space group. K(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form distorted KO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(5), and one O(7) atom to form ZnO4 tetrahedra that share corners with three equivalent K(1)O6 octahedra,  a cornercorner with one Zn(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-68°. In the second Zn site, Zn(2) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form ZnO4 tetrahedra that share corners with two equivalent K(1)O6 octahedra,  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-72°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one K(1)O6 octahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with three equivalent Zn(2)O4 tetrahedra, and  an edgeedge with one K(1)O6 octahedra. The corner-sharing octahedral tilt angles are 69°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent K(1)O6 octahedra,  a cornercorner with one Zn(2)O4 tetrahedra, and corners with two equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-63°. H(1) is bonded in a distorted single-bond geometry to one O(6) and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Zn(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one Zn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one K(1), one Zn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(2), one P(2), and one H(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one K(1), one Zn(1), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(1) atom. is represented by the CIF card [CIF]
data_KZn2P2HO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.289
_cell_length_b   8.926
_cell_length_c   9.564
_cell_angle_alpha   96.749
_cell_angle_beta   101.625
_cell_angle_gamma   107.152
_symmetry_Int_Tables_number   1
_cell_volume   414.977
_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  0.404  0.695  0.679  1.0
  K  K1  1  0.596  0.305  0.321  1.0
  Zn  Zn2  1  0.221  0.614  0.237  1.0
  Zn  Zn3  1  0.779  0.386  0.763  1.0
  Zn  Zn4  1  0.685  0.885  0.109  1.0
  Zn  Zn5  1  0.315  0.115  0.891  1.0
  P  P6  1  0.087  0.755  0.946  1.0
  P  P7  1  0.913  0.245  0.054  1.0
  P  P8  1  0.846  0.749  0.396  1.0
  P  P9  1  0.154  0.251  0.604  1.0
  H  H10  1  0.967  0.916  0.608  1.0
  H  H11  1  0.033  0.084  0.392  1.0
  O  O12  1  0.966  0.404  0.154  1.0
  O  O13  1  0.034  0.596  0.846  1.0
  O  O14  1  0.284  0.763  0.098  1.0
  O  O15  1  0.716  0.237  0.902  1.0
  O  O16  1  0.743  0.113  0.122  1.0
  O  O17  1  0.257  0.887  0.878  1.0
  O  O18  1  0.818  0.778  0.966  1.0
  O  O19  1  0.182  0.222  0.034  1.0
  O  O20  1  0.585  0.607  0.329  1.0
  O  O21  1  0.415  0.393  0.671  1.0
  O  O22  1  0.852  0.893  0.317  1.0
  O  O23  1  0.148  0.107  0.683  1.0
  O  O24  1  0.100  0.698  0.402  1.0
  O  O25  1  0.900  0.302  0.598  1.0
  O  O26  1  0.843  0.805  0.561  1.0
  O  O27  1  0.157  0.195  0.439  1.0
[/CIF]
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The material described by KZn2H(PO4)2 crystallizes in the triclinic P-1 space group. K(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(7), and one O(8) atom to form distorted KO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(2), one O(5), and one O(7) atom to form ZnO4 tetrahedra that share corners with three equivalent K(1)O6 octahedra,  a cornercorner with one Zn(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 64-68°. In the second Zn site, Zn(2) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form ZnO4 tetrahedra that share corners with two equivalent K(1)O6 octahedra,  a cornercorner with one Zn(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-72°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one K(1)O6 octahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with three equivalent Zn(2)O4 tetrahedra, and  an edgeedge with one K(1)O6 octahedra. The corner-sharing octahedral tilt angles are 69°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent K(1)O6 octahedra,  a cornercorner with one Zn(2)O4 tetrahedra, and corners with two equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-63°. H(1) is bonded in a distorted single-bond geometry to one O(6) and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Zn(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Zn(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one Zn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one K(1), one Zn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(2), one P(2), and one H(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one K(1), one Zn(1), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(1) atom. is represented by the CIF card [CIF]
data_KZn2P2HO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.289
_cell_length_b   8.926
_cell_length_c   9.564
_cell_angle_alpha   96.749
_cell_angle_beta   101.625
_cell_angle_gamma   107.152
_symmetry_Int_Tables_number   1
_cell_volume   414.977
_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  0.404  0.695  0.679  1.0
  K  K1  1  0.596  0.305  0.321  1.0
  Zn  Zn2  1  0.221  0.614  0.237  1.0
  Zn  Zn3  1  0.779  0.386  0.763  1.0
  Zn  Zn4  1  0.685  0.885  0.109  1.0
  Zn  Zn5  1  0.315  0.115  0.891  1.0
  P  P6  1  0.087  0.755  0.946  1.0
  P  P7  1  0.913  0.245  0.054  1.0
  P  P8  1  0.846  0.749  0.396  1.0
  P  P9  1  0.154  0.251  0.604  1.0
  H  H10  1  0.967  0.916  0.608  1.0
  H  H11  1  0.033  0.084  0.392  1.0
  O  O12  1  0.966  0.404  0.154  1.0
  O  O13  1  0.034  0.596  0.846  1.0
  O  O14  1  0.284  0.763  0.098  1.0
  O  O15  1  0.716  0.237  0.902  1.0
  O  O16  1  0.743  0.113  0.122  1.0
  O  O17  1  0.257  0.887  0.878  1.0
  O  O18  1  0.818  0.778  0.966  1.0
  O  O19  1  0.182  0.222  0.034  1.0
  O  O20  1  0.585  0.607  0.329  1.0
  O  O21  1  0.415  0.393  0.671  1.0
  O  O22  1  0.852  0.893  0.317  1.0
  O  O23  1  0.148  0.107  0.683  1.0
  O  O24  1  0.100  0.698  0.402  1.0
  O  O25  1  0.900  0.302  0.598  1.0
  O  O26  1  0.843  0.805  0.561  1.0
  O  O27  1  0.157  0.195  0.439  1.0
[/CIF]
.