The structure described by Co2P5O16 crystallizes in the monoclinic P2/c space group. Co(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CoO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with three equivalent P(2)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-51°. In the second P site, P(2) 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 42-48°. In the third P site, P(3) is bonded to two equivalent O(6) and two equivalent O(7) atoms to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. is represented by the CIF card [CIF]
data_Co2P5O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.627
_cell_length_b   4.889
_cell_length_c   18.512
_cell_angle_alpha   88.816
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   599.606
_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
  Co  Co0  1  0.822  0.759  0.407  1.0
  Co  Co1  1  0.178  0.241  0.593  1.0
  Co  Co2  1  0.178  0.759  0.907  1.0
  Co  Co3  1  0.822  0.241  0.093  1.0
  P  P4  1  0.452  0.269  0.871  1.0
  P  P5  1  0.548  0.269  0.371  1.0
  P  P6  1  0.124  0.249  0.426  1.0
  P  P7  1  0.253  0.000  0.750  1.0
  P  P8  1  0.747  0.000  0.250  1.0
  P  P9  1  0.876  0.751  0.574  1.0
  P  P10  1  0.548  0.731  0.129  1.0
  P  P11  1  0.876  0.249  0.926  1.0
  P  P12  1  0.452  0.731  0.629  1.0
  P  P13  1  0.124  0.751  0.074  1.0
  O  O14  1  0.975  0.436  0.387  1.0
  O  O15  1  0.055  0.054  0.068  1.0
  O  O16  1  0.025  0.436  0.887  1.0
  O  O17  1  0.784  0.651  0.504  1.0
  O  O18  1  0.690  0.774  0.631  1.0
  O  O19  1  0.653  0.070  0.421  1.0
  O  O20  1  0.594  0.792  0.213  1.0
  O  O21  1  0.406  0.792  0.713  1.0
  O  O22  1  0.347  0.070  0.921  1.0
  O  O23  1  0.945  0.054  0.568  1.0
  O  O24  1  0.216  0.349  0.496  1.0
  O  O25  1  0.871  0.852  0.307  1.0
  O  O26  1  0.653  0.930  0.079  1.0
  O  O27  1  0.690  0.226  0.869  1.0
  O  O28  1  0.310  0.774  0.131  1.0
  O  O29  1  0.216  0.651  0.004  1.0
  O  O30  1  0.310  0.226  0.369  1.0
  O  O31  1  0.580  0.428  0.118  1.0
  O  O32  1  0.420  0.572  0.882  1.0
  O  O33  1  0.871  0.148  0.193  1.0
  O  O34  1  0.406  0.208  0.787  1.0
  O  O35  1  0.945  0.946  0.932  1.0
  O  O36  1  0.025  0.564  0.613  1.0
  O  O37  1  0.129  0.852  0.807  1.0
  O  O38  1  0.784  0.349  0.996  1.0
  O  O39  1  0.055  0.946  0.432  1.0
  O  O40  1  0.975  0.564  0.113  1.0
  O  O41  1  0.594  0.208  0.287  1.0
  O  O42  1  0.580  0.572  0.382  1.0
  O  O43  1  0.129  0.148  0.693  1.0
  O  O44  1  0.347  0.930  0.579  1.0
  O  O45  1  0.420  0.428  0.618  1.0
[/CIF]
.
The structure described by Co2P5O16 crystallizes in the monoclinic P2/c space group. Co(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(7), and one O(8) atom to form CoO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with three equivalent P(2)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-51°. In the second P site, P(2) 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 42-48°. In the third P site, P(3) is bonded to two equivalent O(6) and two equivalent O(7) atoms to form PO4 tetrahedra that share corners with two equivalent Co(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. is represented by the CIF card [CIF]
data_Co2P5O16
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.627
_cell_length_b   4.889
_cell_length_c   18.512
_cell_angle_alpha   88.816
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   599.606
_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
  Co  Co0  1  0.822  0.759  0.407  1.0
  Co  Co1  1  0.178  0.241  0.593  1.0
  Co  Co2  1  0.178  0.759  0.907  1.0
  Co  Co3  1  0.822  0.241  0.093  1.0
  P  P4  1  0.452  0.269  0.871  1.0
  P  P5  1  0.548  0.269  0.371  1.0
  P  P6  1  0.124  0.249  0.426  1.0
  P  P7  1  0.253  0.000  0.750  1.0
  P  P8  1  0.747  0.000  0.250  1.0
  P  P9  1  0.876  0.751  0.574  1.0
  P  P10  1  0.548  0.731  0.129  1.0
  P  P11  1  0.876  0.249  0.926  1.0
  P  P12  1  0.452  0.731  0.629  1.0
  P  P13  1  0.124  0.751  0.074  1.0
  O  O14  1  0.975  0.436  0.387  1.0
  O  O15  1  0.055  0.054  0.068  1.0
  O  O16  1  0.025  0.436  0.887  1.0
  O  O17  1  0.784  0.651  0.504  1.0
  O  O18  1  0.690  0.774  0.631  1.0
  O  O19  1  0.653  0.070  0.421  1.0
  O  O20  1  0.594  0.792  0.213  1.0
  O  O21  1  0.406  0.792  0.713  1.0
  O  O22  1  0.347  0.070  0.921  1.0
  O  O23  1  0.945  0.054  0.568  1.0
  O  O24  1  0.216  0.349  0.496  1.0
  O  O25  1  0.871  0.852  0.307  1.0
  O  O26  1  0.653  0.930  0.079  1.0
  O  O27  1  0.690  0.226  0.869  1.0
  O  O28  1  0.310  0.774  0.131  1.0
  O  O29  1  0.216  0.651  0.004  1.0
  O  O30  1  0.310  0.226  0.369  1.0
  O  O31  1  0.580  0.428  0.118  1.0
  O  O32  1  0.420  0.572  0.882  1.0
  O  O33  1  0.871  0.148  0.193  1.0
  O  O34  1  0.406  0.208  0.787  1.0
  O  O35  1  0.945  0.946  0.932  1.0
  O  O36  1  0.025  0.564  0.613  1.0
  O  O37  1  0.129  0.852  0.807  1.0
  O  O38  1  0.784  0.349  0.996  1.0
  O  O39  1  0.055  0.946  0.432  1.0
  O  O40  1  0.975  0.564  0.113  1.0
  O  O41  1  0.594  0.208  0.287  1.0
  O  O42  1  0.580  0.572  0.382  1.0
  O  O43  1  0.129  0.148  0.693  1.0
  O  O44  1  0.347  0.930  0.579  1.0
  O  O45  1  0.420  0.428  0.618  1.0
[/CIF]
.