The compound described by K2Cr4Co(HO4)4 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), two equivalent O(7), and two equivalent O(8) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(3), one O(4), one O(5), and one O(8) atom to form CrO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  a cornercorner with one Cr(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form CrO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  a cornercorner with one Cr(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 4°. Co(1) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent Cr(1)O4 tetrahedra and corners with two equivalent Cr(2)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(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Cr(2) and one Co(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1), one Cr(1), and one Cr(2) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one K(1) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one Cr(1), and one Co(1) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one K(1), one Co(1), one H(1), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. is represented by the CIF card [CIF]
data_K2Cr4Co(HO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.965
_cell_length_b   7.830
_cell_length_c   7.987
_cell_angle_alpha   89.855
_cell_angle_beta   81.678
_cell_angle_gamma   63.749
_symmetry_Int_Tables_number   1
_cell_volume   385.588
_cell_formula_units_Z   1
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  0.293  0.262  0.827  1.0
  K  K1  1  0.707  0.738  0.173  1.0
  Cr  Cr2  1  0.261  0.795  0.836  1.0
  Cr  Cr3  1  0.739  0.205  0.165  1.0
  Cr  Cr4  1  0.271  0.498  0.332  1.0
  Cr  Cr5  1  0.729  0.502  0.668  1.0
  Co  Co6  1  0.000  1.000  0.500  1.0
  H  H7  1  0.194  0.081  0.225  1.0
  H  H8  1  0.806  0.919  0.775  1.0
  H  H9  1  0.742  0.848  0.617  1.0
  H  H10  1  0.258  0.152  0.383  1.0
  O  O11  1  0.851  0.280  0.585  1.0
  O  O12  1  0.722  0.655  0.525  1.0
  O  O13  1  0.454  0.557  0.757  1.0
  O  O14  1  0.044  0.784  0.927  1.0
  O  O15  1  0.206  0.939  0.678  1.0
  O  O16  1  0.756  0.958  0.666  1.0
  O  O17  1  0.244  0.042  0.334  1.0
  O  O18  1  0.278  0.345  0.475  1.0
  O  O19  1  0.794  0.060  0.322  1.0
  O  O20  1  0.149  0.720  0.415  1.0
  O  O21  1  0.152  0.469  0.182  1.0
  O  O22  1  0.545  0.443  0.243  1.0
  O  O23  1  0.956  0.216  0.073  1.0
  O  O24  1  0.632  0.128  0.032  1.0
  O  O25  1  0.368  0.872  0.968  1.0
  O  O26  1  0.848  0.531  0.818  1.0
[/CIF]
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The compound described by K2Cr4Co(HO4)4 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), two equivalent O(7), and two equivalent O(8) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(3), one O(4), one O(5), and one O(8) atom to form CrO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  a cornercorner with one Cr(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form CrO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  a cornercorner with one Cr(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 4°. Co(1) is bonded to two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with two equivalent Cr(1)O4 tetrahedra and corners with two equivalent Cr(2)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(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Cr(2) and one Co(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(1), one Cr(1), and one Cr(2) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one K(1) and one Cr(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one Cr(1), and one Co(1) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one K(1), one Co(1), one H(1), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(2) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom. is represented by the CIF card [CIF]
data_K2Cr4Co(HO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.965
_cell_length_b   7.830
_cell_length_c   7.987
_cell_angle_alpha   89.855
_cell_angle_beta   81.678
_cell_angle_gamma   63.749
_symmetry_Int_Tables_number   1
_cell_volume   385.588
_cell_formula_units_Z   1
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  0.293  0.262  0.827  1.0
  K  K1  1  0.707  0.738  0.173  1.0
  Cr  Cr2  1  0.261  0.795  0.836  1.0
  Cr  Cr3  1  0.739  0.205  0.165  1.0
  Cr  Cr4  1  0.271  0.498  0.332  1.0
  Cr  Cr5  1  0.729  0.502  0.668  1.0
  Co  Co6  1  0.000  1.000  0.500  1.0
  H  H7  1  0.194  0.081  0.225  1.0
  H  H8  1  0.806  0.919  0.775  1.0
  H  H9  1  0.742  0.848  0.617  1.0
  H  H10  1  0.258  0.152  0.383  1.0
  O  O11  1  0.851  0.280  0.585  1.0
  O  O12  1  0.722  0.655  0.525  1.0
  O  O13  1  0.454  0.557  0.757  1.0
  O  O14  1  0.044  0.784  0.927  1.0
  O  O15  1  0.206  0.939  0.678  1.0
  O  O16  1  0.756  0.958  0.666  1.0
  O  O17  1  0.244  0.042  0.334  1.0
  O  O18  1  0.278  0.345  0.475  1.0
  O  O19  1  0.794  0.060  0.322  1.0
  O  O20  1  0.149  0.720  0.415  1.0
  O  O21  1  0.152  0.469  0.182  1.0
  O  O22  1  0.545  0.443  0.243  1.0
  O  O23  1  0.956  0.216  0.073  1.0
  O  O24  1  0.632  0.128  0.032  1.0
  O  O25  1  0.368  0.872  0.968  1.0
  O  O26  1  0.848  0.531  0.818  1.0
[/CIF]
.