The crystal structure described by K2Cr2Zn(H2O5)2 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-48°. Zn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form ZnO6 octahedra that share corners with four equivalent Cr(1)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one K(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Cr(1), and one Zn(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent K(1), one Cr(1), and one Zn(1) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one K(1), one Zn(1), one H(1), and one H(2) atom. is represented by the CIF file [CIF]
data_K2ZnCr2(H2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.083
_cell_length_b   8.083
_cell_length_c   12.532
_cell_angle_alpha   66.714
_cell_angle_beta   66.714
_cell_angle_gamma   41.655
_symmetry_Int_Tables_number   1
_cell_volume   493.165
_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  0.688  0.050  0.544  1.0
  K  K1  1  0.312  0.950  0.456  1.0
  K  K2  1  0.950  0.312  0.956  1.0
  K  K3  1  0.050  0.688  0.044  1.0
  Zn  Zn4  1  0.845  0.155  0.750  1.0
  Zn  Zn5  1  0.155  0.845  0.250  1.0
  Cr  Cr6  1  0.456  0.771  0.790  1.0
  Cr  Cr7  1  0.544  0.229  0.210  1.0
  Cr  Cr8  1  0.229  0.544  0.710  1.0
  Cr  Cr9  1  0.771  0.456  0.290  1.0
  H  H10  1  0.667  0.943  0.866  1.0
  H  H11  1  0.333  0.057  0.134  1.0
  H  H12  1  0.057  0.333  0.634  1.0
  H  H13  1  0.943  0.667  0.366  1.0
  H  H14  1  0.512  0.188  0.910  1.0
  H  H15  1  0.488  0.812  0.090  1.0
  H  H16  1  0.812  0.488  0.590  1.0
  H  H17  1  0.188  0.512  0.410  1.0
  O  O18  1  0.520  0.814  0.645  1.0
  O  O19  1  0.480  0.186  0.355  1.0
  O  O20  1  0.186  0.480  0.855  1.0
  O  O21  1  0.814  0.520  0.145  1.0
  O  O22  1  0.554  0.838  0.844  1.0
  O  O23  1  0.446  0.162  0.156  1.0
  O  O24  1  0.162  0.446  0.656  1.0
  O  O25  1  0.838  0.554  0.344  1.0
  O  O26  1  0.534  0.389  0.660  1.0
  O  O27  1  0.466  0.611  0.340  1.0
  O  O28  1  0.611  0.466  0.840  1.0
  O  O29  1  0.389  0.534  0.160  1.0
  O  O30  1  0.859  0.043  0.164  1.0
  O  O31  1  0.141  0.957  0.836  1.0
  O  O32  1  0.957  0.141  0.336  1.0
  O  O33  1  0.043  0.859  0.664  1.0
  O  O34  1  0.687  0.028  0.893  1.0
  O  O35  1  0.313  0.972  0.107  1.0
  O  O36  1  0.972  0.313  0.607  1.0
  O  O37  1  0.028  0.687  0.393  1.0
[/CIF]
.
The crystal structure described by K2Cr2Zn(H2O5)2 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to one O(2), one O(3), one O(5), two equivalent O(1), and two equivalent O(4) atoms. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-48°. Zn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form ZnO6 octahedra that share corners with four equivalent Cr(1)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one K(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Cr(1), and one Zn(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent K(1), one Cr(1), and one Zn(1) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to one K(1), one Zn(1), one H(1), and one H(2) atom. is represented by the CIF file [CIF]
data_K2ZnCr2(H2O5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.083
_cell_length_b   8.083
_cell_length_c   12.532
_cell_angle_alpha   66.714
_cell_angle_beta   66.714
_cell_angle_gamma   41.655
_symmetry_Int_Tables_number   1
_cell_volume   493.165
_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  0.688  0.050  0.544  1.0
  K  K1  1  0.312  0.950  0.456  1.0
  K  K2  1  0.950  0.312  0.956  1.0
  K  K3  1  0.050  0.688  0.044  1.0
  Zn  Zn4  1  0.845  0.155  0.750  1.0
  Zn  Zn5  1  0.155  0.845  0.250  1.0
  Cr  Cr6  1  0.456  0.771  0.790  1.0
  Cr  Cr7  1  0.544  0.229  0.210  1.0
  Cr  Cr8  1  0.229  0.544  0.710  1.0
  Cr  Cr9  1  0.771  0.456  0.290  1.0
  H  H10  1  0.667  0.943  0.866  1.0
  H  H11  1  0.333  0.057  0.134  1.0
  H  H12  1  0.057  0.333  0.634  1.0
  H  H13  1  0.943  0.667  0.366  1.0
  H  H14  1  0.512  0.188  0.910  1.0
  H  H15  1  0.488  0.812  0.090  1.0
  H  H16  1  0.812  0.488  0.590  1.0
  H  H17  1  0.188  0.512  0.410  1.0
  O  O18  1  0.520  0.814  0.645  1.0
  O  O19  1  0.480  0.186  0.355  1.0
  O  O20  1  0.186  0.480  0.855  1.0
  O  O21  1  0.814  0.520  0.145  1.0
  O  O22  1  0.554  0.838  0.844  1.0
  O  O23  1  0.446  0.162  0.156  1.0
  O  O24  1  0.162  0.446  0.656  1.0
  O  O25  1  0.838  0.554  0.344  1.0
  O  O26  1  0.534  0.389  0.660  1.0
  O  O27  1  0.466  0.611  0.340  1.0
  O  O28  1  0.611  0.466  0.840  1.0
  O  O29  1  0.389  0.534  0.160  1.0
  O  O30  1  0.859  0.043  0.164  1.0
  O  O31  1  0.141  0.957  0.836  1.0
  O  O32  1  0.957  0.141  0.336  1.0
  O  O33  1  0.043  0.859  0.664  1.0
  O  O34  1  0.687  0.028  0.893  1.0
  O  O35  1  0.313  0.972  0.107  1.0
  O  O36  1  0.972  0.313  0.607  1.0
  O  O37  1  0.028  0.687  0.393  1.0
[/CIF]
.