The material described by CoP2O7 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(14), one O(17), one O(19), one O(21), one O(26), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(16), one O(20), one O(21), and one O(23) atom to form CoO6 octahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. In the third Co site, Co(3) is bonded to one O(1), one O(12), one O(2), one O(24), one O(28), and one O(4) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. In the fourth Co site, Co(4) is bonded to one O(11), one O(24), one O(27), one O(3), one O(5), and one O(7) atom to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(15), one O(2), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-49°. In the second P site, P(2) is bonded to one O(4), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-41°. In the third P site, P(3) is bonded to one O(16), one O(17), one O(18), and one O(23) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-49°. In the fourth P site, P(4) is bonded to one O(10), one O(22), one O(25), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra, and  a cornercorner with one P(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-41°. In the fifth P site, P(5) is bonded to one O(13), one O(26), one O(28), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-40°. In the sixth P site, P(6) is bonded to one O(15), one O(19), one O(21), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 44°. In the seventh P site, P(7) is bonded to one O(1), one O(18), one O(20), and one O(24) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-44°. In the eighth P site, P(8) is bonded to one O(12), one O(14), one O(25), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-39°. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Co(3) and one P(7) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(3) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Co(4) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Co(3) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Co(4) and one P(8) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(2) and one P(5) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Co(4) and one P(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Co(1) and one P(4) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Co(2) and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Co(4) and one P(1) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Co(3) and one P(8) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Co(2) and one P(5) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Co(1) and one P(8) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one P(1) and one P(6) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Co(2) and one P(3) atom. In the seventeenth O site, O(17) is bonded in a bent 150 degrees geometry to one Co(1) and one P(3) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one P(3) and one P(7) atom. In the nineteenth O site, O(19) is bonded in a water-like geometry to one Co(1) and one P(6) atom. In the twentieth O site, O(20) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(7) atom. In the twenty-first O site, O(21) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(6) atom. In the twenty-second O site, O(22) is bonded in a single-bond geometry to one P(4) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(3) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one P(7) atom. In the twenty-fifth O site, O(25) is bonded in a bent 120 degrees geometry to one P(4) and one P(8) atom. In the twenty-sixth O site, O(26) is bonded in a bent 150 degrees geometry to one Co(1) and one P(5) atom. In the twenty-seventh O site, O(27) is bonded in a distorted bent 150 degrees geometry to one Co(4) and one P(6) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one Co(3) and one P(5) atom. is represented by the CIF card [CIF]
data_CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.473
_cell_length_b   10.642
_cell_length_c   9.709
_cell_angle_alpha   63.411
_cell_angle_beta   107.098
_cell_angle_gamma   95.435
_symmetry_Int_Tables_number   1
_cell_volume   571.121
_cell_formula_units_Z   4
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  0.724  0.779  0.092  1.0
  Co  Co1  1  0.625  0.754  0.492  1.0
  Co  Co2  1  0.276  0.224  0.899  1.0
  Co  Co3  1  0.372  0.251  0.498  1.0
  P  P4  1  0.889  0.303  0.548  1.0
  P  P5  1  0.079  0.209  0.182  1.0
  P  P6  1  0.108  0.703  0.443  1.0
  P  P7  1  0.921  0.796  0.807  1.0
  P  P8  1  0.697  0.036  0.187  1.0
  P  P9  1  0.582  0.544  0.310  1.0
  P  P10  1  0.415  0.462  0.682  1.0
  P  P11  1  0.303  0.969  0.803  1.0
  O  O12  1  0.364  0.416  0.843  1.0
  O  O13  1  1.000  0.286  0.718  1.0
  O  O14  1  0.052  0.281  0.474  1.0
  O  O15  1  0.119  0.175  0.054  1.0
  O  O16  1  0.383  0.064  0.657  1.0
  O  O17  1  0.925  0.087  0.265  1.0
  O  O18  1  0.279  0.198  0.317  1.0
  O  O19  1  0.961  0.353  0.095  1.0
  O  O20  1  0.884  0.827  0.938  1.0
  O  O21  1  0.720  0.809  0.673  1.0
  O  O22  1  0.694  0.211  0.539  1.0
  O  O23  1  0.258  0.050  0.888  1.0
  O  O24  1  0.615  0.942  0.331  1.0
  O  O25  1  0.447  0.838  0.921  1.0
  O  O26  1  0.798  0.464  0.449  1.0
  O  O27  1  0.944  0.726  0.516  1.0
  O  O28  1  0.998  0.717  0.273  1.0
  O  O29  1  0.198  0.542  0.544  1.0
  O  O30  1  0.635  0.588  0.149  1.0
  O  O31  1  0.597  0.563  0.649  1.0
  O  O32  1  0.554  0.684  0.314  1.0
  O  O33  1  0.036  0.650  0.893  1.0
  O  O34  1  0.304  0.794  0.452  1.0
  O  O35  1  0.442  0.322  0.676  1.0
  O  O36  1  0.076  0.917  0.725  1.0
  O  O37  1  0.744  0.953  0.103  1.0
  O  O38  1  0.399  0.443  0.342  1.0
  O  O39  1  0.556  0.167  0.067  1.0
[/CIF]
.
The material described by CoP2O7 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(14), one O(17), one O(19), one O(21), one O(26), and one O(9) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(16), one O(20), one O(21), and one O(23) atom to form CoO6 octahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 57°. In the third Co site, Co(3) is bonded to one O(1), one O(12), one O(2), one O(24), one O(28), and one O(4) atom to form distorted CoO6 octahedra that share  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. In the fourth Co site, Co(4) is bonded to one O(11), one O(24), one O(27), one O(3), one O(5), and one O(7) atom to form CoO6 octahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(15), one O(2), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Co(3)O6 octahedra, corners with two equivalent Co(4)O6 octahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-49°. In the second P site, P(2) is bonded to one O(4), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-41°. In the third P site, P(3) is bonded to one O(16), one O(17), one O(18), and one O(23) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra, and  a cornercorner with one P(7)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 33-49°. In the fourth P site, P(4) is bonded to one O(10), one O(22), one O(25), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra, and  a cornercorner with one P(8)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 35-41°. In the fifth P site, P(5) is bonded to one O(13), one O(26), one O(28), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-40°. In the sixth P site, P(6) is bonded to one O(15), one O(19), one O(21), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 44°. In the seventh P site, P(7) is bonded to one O(1), one O(18), one O(20), and one O(24) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one Co(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-44°. In the eighth P site, P(8) is bonded to one O(12), one O(14), one O(25), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra,  a cornercorner with one Co(3)O6 octahedra,  a cornercorner with one Co(4)O6 octahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 34-39°. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Co(3) and one P(7) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(3) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Co(4) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Co(3) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Co(4) and one P(8) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(2) and one P(5) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Co(4) and one P(2) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Co(1) and one P(4) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Co(2) and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Co(4) and one P(1) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Co(3) and one P(8) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Co(2) and one P(5) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Co(1) and one P(8) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one P(1) and one P(6) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Co(2) and one P(3) atom. In the seventeenth O site, O(17) is bonded in a bent 150 degrees geometry to one Co(1) and one P(3) atom. In the eighteenth O site, O(18) is bonded in a distorted bent 150 degrees geometry to one P(3) and one P(7) atom. In the nineteenth O site, O(19) is bonded in a water-like geometry to one Co(1) and one P(6) atom. In the twentieth O site, O(20) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(7) atom. In the twenty-first O site, O(21) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(6) atom. In the twenty-second O site, O(22) is bonded in a single-bond geometry to one P(4) atom. In the twenty-third O site, O(23) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(3) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one P(7) atom. In the twenty-fifth O site, O(25) is bonded in a bent 120 degrees geometry to one P(4) and one P(8) atom. In the twenty-sixth O site, O(26) is bonded in a bent 150 degrees geometry to one Co(1) and one P(5) atom. In the twenty-seventh O site, O(27) is bonded in a distorted bent 150 degrees geometry to one Co(4) and one P(6) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one Co(3) and one P(5) atom. is represented by the CIF card [CIF]
data_CoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.473
_cell_length_b   10.642
_cell_length_c   9.709
_cell_angle_alpha   63.411
_cell_angle_beta   107.098
_cell_angle_gamma   95.435
_symmetry_Int_Tables_number   1
_cell_volume   571.121
_cell_formula_units_Z   4
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  0.724  0.779  0.092  1.0
  Co  Co1  1  0.625  0.754  0.492  1.0
  Co  Co2  1  0.276  0.224  0.899  1.0
  Co  Co3  1  0.372  0.251  0.498  1.0
  P  P4  1  0.889  0.303  0.548  1.0
  P  P5  1  0.079  0.209  0.182  1.0
  P  P6  1  0.108  0.703  0.443  1.0
  P  P7  1  0.921  0.796  0.807  1.0
  P  P8  1  0.697  0.036  0.187  1.0
  P  P9  1  0.582  0.544  0.310  1.0
  P  P10  1  0.415  0.462  0.682  1.0
  P  P11  1  0.303  0.969  0.803  1.0
  O  O12  1  0.364  0.416  0.843  1.0
  O  O13  1  1.000  0.286  0.718  1.0
  O  O14  1  0.052  0.281  0.474  1.0
  O  O15  1  0.119  0.175  0.054  1.0
  O  O16  1  0.383  0.064  0.657  1.0
  O  O17  1  0.925  0.087  0.265  1.0
  O  O18  1  0.279  0.198  0.317  1.0
  O  O19  1  0.961  0.353  0.095  1.0
  O  O20  1  0.884  0.827  0.938  1.0
  O  O21  1  0.720  0.809  0.673  1.0
  O  O22  1  0.694  0.211  0.539  1.0
  O  O23  1  0.258  0.050  0.888  1.0
  O  O24  1  0.615  0.942  0.331  1.0
  O  O25  1  0.447  0.838  0.921  1.0
  O  O26  1  0.798  0.464  0.449  1.0
  O  O27  1  0.944  0.726  0.516  1.0
  O  O28  1  0.998  0.717  0.273  1.0
  O  O29  1  0.198  0.542  0.544  1.0
  O  O30  1  0.635  0.588  0.149  1.0
  O  O31  1  0.597  0.563  0.649  1.0
  O  O32  1  0.554  0.684  0.314  1.0
  O  O33  1  0.036  0.650  0.893  1.0
  O  O34  1  0.304  0.794  0.452  1.0
  O  O35  1  0.442  0.322  0.676  1.0
  O  O36  1  0.076  0.917  0.725  1.0
  O  O37  1  0.744  0.953  0.103  1.0
  O  O38  1  0.399  0.443  0.342  1.0
  O  O39  1  0.556  0.167  0.067  1.0
[/CIF]
.