The material structure described by Co2P2O7 crystallizes in the triclinic P1 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(12), one O(14), one O(4), one O(6), and one O(8) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and edges with three equivalent Co(4)O6 octahedra. In the second Co site, Co(2) is bonded to one O(11), one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with three equivalent Co(3)O6 octahedra. In the third Co site, Co(3) is bonded to one O(11), one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with three equivalent Co(2)O6 octahedra. In the fourth Co site, Co(4) is bonded to one O(10), one O(12), one O(14), one O(4), one O(6), and one O(8) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and edges with three equivalent Co(1)O6 octahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(2), one O(6), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Co(3)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-62°. In the second P site, P(2) is bonded to one O(1), one O(10), one O(12), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. In the third P site, P(3) is bonded to one O(1), one O(13), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Co(3)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. In the fourth P site, P(4) is bonded to one O(14), one O(2), one O(3), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-62°. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one P(2) and one P(3) atom. In the second O site, O(2) is bonded in a linear geometry to one P(1) and one P(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one P(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(4), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(4), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(4) atom. is represented by the CIF file [CIF]
data_Co2P2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.537
_cell_length_b   5.339
_cell_length_c   5.355
_cell_angle_alpha   103.880
_cell_angle_beta   98.075
_cell_angle_gamma   98.187
_symmetry_Int_Tables_number   1
_cell_volume   122.566
_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  0.499  0.312  0.688  1.0
  Co  Co1  1  0.501  0.688  0.312  1.0
  O  O2  1  0.000  1.000  1.000  1.0
  O  O3  1  0.212  0.378  0.377  1.0
  O  O4  1  0.788  0.622  0.623  1.0
  O  O5  1  0.721  0.073  0.377  1.0
  O  O6  1  0.279  0.622  0.926  1.0
  O  O7  1  0.279  0.927  0.623  1.0
  O  O8  1  0.722  0.378  0.073  1.0
  P  P9  1  0.094  0.783  0.783  1.0
  P  P10  1  0.906  0.217  0.217  1.0
[/CIF]
.
The material structure described by Co2P2O7 crystallizes in the triclinic P1 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(10), one O(12), one O(14), one O(4), one O(6), and one O(8) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and edges with three equivalent Co(4)O6 octahedra. In the second Co site, Co(2) is bonded to one O(11), one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with three equivalent Co(3)O6 octahedra. In the third Co site, Co(3) is bonded to one O(11), one O(13), one O(3), one O(5), one O(7), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with three equivalent Co(2)O6 octahedra. In the fourth Co site, Co(4) is bonded to one O(10), one O(12), one O(14), one O(4), one O(6), and one O(8) atom to form distorted CoO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and edges with three equivalent Co(1)O6 octahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(2), one O(6), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Co(3)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-62°. In the second P site, P(2) is bonded to one O(1), one O(10), one O(12), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. In the third P site, P(3) is bonded to one O(1), one O(13), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, corners with two equivalent Co(3)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. In the fourth P site, P(4) is bonded to one O(14), one O(2), one O(3), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-62°. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one P(2) and one P(3) atom. In the second O site, O(2) is bonded in a linear geometry to one P(1) and one P(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one P(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(4), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(4), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(3) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(2) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Co(1), one Co(4), and one P(4) atom. is represented by the CIF file [CIF]
data_Co2P2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.537
_cell_length_b   5.339
_cell_length_c   5.355
_cell_angle_alpha   103.880
_cell_angle_beta   98.075
_cell_angle_gamma   98.187
_symmetry_Int_Tables_number   1
_cell_volume   122.566
_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  0.499  0.312  0.688  1.0
  Co  Co1  1  0.501  0.688  0.312  1.0
  O  O2  1  0.000  1.000  1.000  1.0
  O  O3  1  0.212  0.378  0.377  1.0
  O  O4  1  0.788  0.622  0.623  1.0
  O  O5  1  0.721  0.073  0.377  1.0
  O  O6  1  0.279  0.622  0.926  1.0
  O  O7  1  0.279  0.927  0.623  1.0
  O  O8  1  0.722  0.378  0.073  1.0
  P  P9  1  0.094  0.783  0.783  1.0
  P  P10  1  0.906  0.217  0.217  1.0
[/CIF]
.