The structure described by CoP2O7 crystallizes in the monoclinic C2 space group. Co(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. 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 corners with three equivalent Co(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-47°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent P(1) atoms. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Co(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.236
_cell_length_b   5.236
_cell_length_c   4.561
_cell_angle_alpha   83.151
_cell_angle_beta   83.151
_cell_angle_gamma   101.230
_symmetry_Int_Tables_number   1
_cell_volume   120.438
_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
  Co  Co0  1  0.062  0.938  0.500  1.0
  P  P1  1  0.197  0.391  0.911  1.0
  P  P2  1  0.609  0.803  0.089  1.0
  O  O3  1  0.480  0.520  0.000  1.0
  O  O4  1  0.029  0.246  0.202  1.0
  O  O5  1  0.754  0.971  0.798  1.0
  O  O6  1  0.082  0.607  0.761  1.0
  O  O7  1  0.801  0.732  0.301  1.0
  O  O8  1  0.393  0.918  0.239  1.0
  O  O9  1  0.268  0.199  0.699  1.0
[/CIF]
.
The structure described by CoP2O7 crystallizes in the monoclinic C2 space group. Co(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. 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 corners with three equivalent Co(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-47°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent P(1) atoms. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Co(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.236
_cell_length_b   5.236
_cell_length_c   4.561
_cell_angle_alpha   83.151
_cell_angle_beta   83.151
_cell_angle_gamma   101.230
_symmetry_Int_Tables_number   1
_cell_volume   120.438
_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
  Co  Co0  1  0.062  0.938  0.500  1.0
  P  P1  1  0.197  0.391  0.911  1.0
  P  P2  1  0.609  0.803  0.089  1.0
  O  O3  1  0.480  0.520  0.000  1.0
  O  O4  1  0.029  0.246  0.202  1.0
  O  O5  1  0.754  0.971  0.798  1.0
  O  O6  1  0.082  0.607  0.761  1.0
  O  O7  1  0.801  0.732  0.301  1.0
  O  O8  1  0.393  0.918  0.239  1.0
  O  O9  1  0.268  0.199  0.699  1.0
[/CIF]
.