The compound described by K2CoV2O7 crystallizes in the tetragonal P-42_1m space group. K(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent O(2), and four equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent Co(1)O4 tetrahedra. Co(1) is bonded to four equivalent O(3) atoms to form CoO4 tetrahedra that share corners with four equivalent V(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent V(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one V(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent K(1), one V(1), and one Co(1) atom. is represented by the CIF card [CIF]
data_K2V2CoO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.713
_cell_length_b   8.586
_cell_length_c   8.586
_cell_angle_alpha   90.000
_cell_angle_beta   90.003
_cell_angle_gamma   90.003
_symmetry_Int_Tables_number   1
_cell_volume   421.163
_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  0.509  0.162  0.662  1.0
  K  K1  1  0.491  0.338  0.162  1.0
  K  K2  1  0.509  0.838  0.338  1.0
  K  K3  1  0.491  0.662  0.838  1.0
  V  V4  1  0.950  0.642  0.142  1.0
  V  V5  1  0.050  0.142  0.358  1.0
  V  V6  1  0.950  0.358  0.858  1.0
  V  V7  1  0.050  0.858  0.642  1.0
  Co  Co8  1  1.000  0.500  0.500  1.0
  Co  Co9  1  1.000  0.000  1.000  1.0
  O  O10  1  0.157  1.000  0.500  1.0
  O  O11  1  0.843  0.500  1.000  1.0
  O  O12  1  0.756  0.145  0.355  1.0
  O  O13  1  0.244  0.355  0.855  1.0
  O  O14  1  0.756  0.855  0.645  1.0
  O  O15  1  0.244  0.645  0.145  1.0
  O  O16  1  0.169  0.322  0.411  1.0
  O  O17  1  0.831  0.178  0.911  1.0
  O  O18  1  0.169  0.678  0.589  1.0
  O  O19  1  0.831  0.822  0.089  1.0
  O  O20  1  0.831  0.589  0.322  1.0
  O  O21  1  0.169  0.911  0.822  1.0
  O  O22  1  0.831  0.411  0.678  1.0
  O  O23  1  0.169  0.089  0.178  1.0
[/CIF]
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The compound described by K2CoV2O7 crystallizes in the tetragonal P-42_1m space group. K(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent O(2), and four equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent Co(1)O4 tetrahedra. Co(1) is bonded to four equivalent O(3) atoms to form CoO4 tetrahedra that share corners with four equivalent V(1)O4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent V(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one V(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent K(1), one V(1), and one Co(1) atom. is represented by the CIF card [CIF]
data_K2V2CoO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.713
_cell_length_b   8.586
_cell_length_c   8.586
_cell_angle_alpha   90.000
_cell_angle_beta   90.003
_cell_angle_gamma   90.003
_symmetry_Int_Tables_number   1
_cell_volume   421.163
_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  0.509  0.162  0.662  1.0
  K  K1  1  0.491  0.338  0.162  1.0
  K  K2  1  0.509  0.838  0.338  1.0
  K  K3  1  0.491  0.662  0.838  1.0
  V  V4  1  0.950  0.642  0.142  1.0
  V  V5  1  0.050  0.142  0.358  1.0
  V  V6  1  0.950  0.358  0.858  1.0
  V  V7  1  0.050  0.858  0.642  1.0
  Co  Co8  1  1.000  0.500  0.500  1.0
  Co  Co9  1  1.000  0.000  1.000  1.0
  O  O10  1  0.157  1.000  0.500  1.0
  O  O11  1  0.843  0.500  1.000  1.0
  O  O12  1  0.756  0.145  0.355  1.0
  O  O13  1  0.244  0.355  0.855  1.0
  O  O14  1  0.756  0.855  0.645  1.0
  O  O15  1  0.244  0.645  0.145  1.0
  O  O16  1  0.169  0.322  0.411  1.0
  O  O17  1  0.831  0.178  0.911  1.0
  O  O18  1  0.169  0.678  0.589  1.0
  O  O19  1  0.831  0.822  0.089  1.0
  O  O20  1  0.831  0.589  0.322  1.0
  O  O21  1  0.169  0.911  0.822  1.0
  O  O22  1  0.831  0.411  0.678  1.0
  O  O23  1  0.169  0.089  0.178  1.0
[/CIF]
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