The material structure described by Co3(P2O7)2 crystallizes in the triclinic P1 space group. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded in a square co-planar geometry to one O(2), one O(25), one O(28), and one O(3) atom. In the second Co site, Co(2) is bonded to one O(14), one O(16), one O(20), one O(24), and one O(6) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one Co(6)O5 trigonal bipyramid. In the third Co site, Co(3) is bonded to one O(13), one O(15), one O(17), one O(21), and one O(7) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one Co(5)O5 trigonal bipyramid. In the fourth Co site, Co(4) is bonded in a square co-planar geometry to one O(1), one O(26), one O(27), and one O(4) atom. In the fifth Co site, Co(5) is bonded to one O(13), one O(15), one O(19), one O(23), and one O(5) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one Co(3)O5 trigonal bipyramid. In the sixth Co site, Co(6) is bonded to one O(14), one O(16), one O(18), one O(22), and one O(8) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Co(2)O5 trigonal bipyramid. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(13), one O(17), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one Co(5)O5 trigonal bipyramid, and corners with two equivalent Co(3)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(12), one O(14), one O(18), and one O(28) atom to form PO4 tetrahedra that share  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and corners with two equivalent Co(6)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(15), one O(19), one O(25), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid, and corners with two equivalent Co(5)O5 trigonal bipyramids. In the fourth P site, P(4) is bonded to one O(10), one O(16), one O(20), and one O(26) atom to form PO4 tetrahedra that share  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Co(6)O5 trigonal bipyramid, and corners with two equivalent Co(2)O5 trigonal bipyramids. In the fifth P site, P(5) is bonded to one O(1), one O(21), one O(5), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid, and  a cornercorner with one Co(5)O5 trigonal bipyramid. In the sixth P site, P(6) is bonded to one O(10), one O(2), one O(22), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  a cornercorner with one Co(6)O5 trigonal bipyramid. In the seventh P site, P(7) is bonded to one O(11), one O(23), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid, and  a cornercorner with one Co(5)O5 trigonal bipyramid. In the eighth P site, P(8) is bonded to one O(12), one O(24), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  a cornercorner with one Co(6)O5 trigonal bipyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(4) and one P(5) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(1) and one P(6) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Co(1) and one P(7) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Co(4) and one P(8) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(5) and one P(5) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one P(6) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(3) and one P(7) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(6) and one P(8) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one P(4) and one P(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(1) and one P(7) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(2) and one P(8) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Co(3), one Co(5), and one P(1) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(6), and one P(2) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Co(3), one Co(5), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(6), and one P(4) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one Co(3) and one P(1) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one Co(6) and one P(2) atom. In the nineteenth O site, O(19) is bonded in a bent 120 degrees geometry to one Co(5) and one P(3) atom. In the twentieth O site, O(20) is bonded in a bent 120 degrees geometry to one Co(2) and one P(4) atom. In the twenty-first O site, O(21) is bonded in a bent 150 degrees geometry to one Co(3) and one P(5) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one Co(6) and one P(6) atom. In the twenty-third O site, O(23) is bonded in a bent 150 degrees geometry to one Co(5) and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one Co(2) and one P(8) atom. In the twenty-fifth O site, O(25) is bonded in a bent 150 degrees geometry to one Co(1) and one P(3) atom. In the twenty-sixth O site, O(26) is bonded in a distorted bent 150 degrees geometry to one Co(4) and one P(4) atom. In the twenty-seventh O site, O(27) is bonded in a bent 150 degrees geometry to one Co(4) and one P(1) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one Co(1) and one P(2) atom. is represented by the CIF file [CIF]
data_Co3(P2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.661
_cell_length_b   6.961
_cell_length_c   7.286
_cell_angle_alpha   95.598
_cell_angle_beta   90.536
_cell_angle_gamma   106.368
_symmetry_Int_Tables_number   1
_cell_volume   273.959
_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  0.000  0.001  0.002  1.0
  Co  Co1  1  0.359  0.520  0.328  1.0
  Co  Co2  1  0.652  0.483  0.674  1.0
  O  O3  1  0.763  0.138  0.092  1.0
  O  O4  1  0.232  0.862  0.907  1.0
  O  O5  1  0.424  0.293  0.194  1.0
  O  O6  1  0.567  0.708  0.793  1.0
  O  O7  1  0.861  0.514  0.152  1.0
  O  O8  1  0.135  0.486  0.851  1.0
  O  O9  1  0.306  0.357  0.558  1.0
  O  O10  1  0.695  0.636  0.449  1.0
  O  O11  1  0.856  0.335  0.571  1.0
  O  O12  1  0.148  0.664  0.426  1.0
  O  O13  1  0.584  0.333  0.876  1.0
  O  O14  1  0.425  0.673  0.119  1.0
  O  O15  1  0.966  0.888  0.245  1.0
  O  O16  1  0.026  0.111  0.763  1.0
  P  P17  1  0.077  0.308  0.683  1.0
  P  P18  1  0.923  0.690  0.320  1.0
  P  P19  1  0.654  0.309  0.074  1.0
  P  P20  1  0.347  0.693  0.922  1.0
[/CIF]
.
The material structure described by Co3(P2O7)2 crystallizes in the triclinic P1 space group. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded in a square co-planar geometry to one O(2), one O(25), one O(28), and one O(3) atom. In the second Co site, Co(2) is bonded to one O(14), one O(16), one O(20), one O(24), and one O(6) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one Co(6)O5 trigonal bipyramid. In the third Co site, Co(3) is bonded to one O(13), one O(15), one O(17), one O(21), and one O(7) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one Co(5)O5 trigonal bipyramid. In the fourth Co site, Co(4) is bonded in a square co-planar geometry to one O(1), one O(26), one O(27), and one O(4) atom. In the fifth Co site, Co(5) is bonded to one O(13), one O(15), one O(19), one O(23), and one O(5) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one Co(3)O5 trigonal bipyramid. In the sixth Co site, Co(6) is bonded to one O(14), one O(16), one O(18), one O(22), and one O(8) atom to form CoO5 trigonal bipyramids that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Co(2)O5 trigonal bipyramid. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(13), one O(17), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one Co(5)O5 trigonal bipyramid, and corners with two equivalent Co(3)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(12), one O(14), one O(18), and one O(28) atom to form PO4 tetrahedra that share  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and corners with two equivalent Co(6)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(15), one O(19), one O(25), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid, and corners with two equivalent Co(5)O5 trigonal bipyramids. In the fourth P site, P(4) is bonded to one O(10), one O(16), one O(20), and one O(26) atom to form PO4 tetrahedra that share  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Co(6)O5 trigonal bipyramid, and corners with two equivalent Co(2)O5 trigonal bipyramids. In the fifth P site, P(5) is bonded to one O(1), one O(21), one O(5), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid, and  a cornercorner with one Co(5)O5 trigonal bipyramid. In the sixth P site, P(6) is bonded to one O(10), one O(2), one O(22), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  a cornercorner with one Co(6)O5 trigonal bipyramid. In the seventh P site, P(7) is bonded to one O(11), one O(23), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Co(3)O5 trigonal bipyramid, and  a cornercorner with one Co(5)O5 trigonal bipyramid. In the eighth P site, P(8) is bonded to one O(12), one O(24), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one Co(2)O5 trigonal bipyramid, and  a cornercorner with one Co(6)O5 trigonal bipyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(4) and one P(5) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Co(1) and one P(6) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Co(1) and one P(7) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Co(4) and one P(8) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(5) and one P(5) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one P(6) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(3) and one P(7) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(6) and one P(8) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one P(4) and one P(6) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one P(1) and one P(7) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(2) and one P(8) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Co(3), one Co(5), and one P(1) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(6), and one P(2) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Co(3), one Co(5), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(6), and one P(4) atom. In the seventeenth O site, O(17) is bonded in a bent 120 degrees geometry to one Co(3) and one P(1) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one Co(6) and one P(2) atom. In the nineteenth O site, O(19) is bonded in a bent 120 degrees geometry to one Co(5) and one P(3) atom. In the twentieth O site, O(20) is bonded in a bent 120 degrees geometry to one Co(2) and one P(4) atom. In the twenty-first O site, O(21) is bonded in a bent 150 degrees geometry to one Co(3) and one P(5) atom. In the twenty-second O site, O(22) is bonded in a bent 150 degrees geometry to one Co(6) and one P(6) atom. In the twenty-third O site, O(23) is bonded in a bent 150 degrees geometry to one Co(5) and one P(7) atom. In the twenty-fourth O site, O(24) is bonded in a bent 150 degrees geometry to one Co(2) and one P(8) atom. In the twenty-fifth O site, O(25) is bonded in a bent 150 degrees geometry to one Co(1) and one P(3) atom. In the twenty-sixth O site, O(26) is bonded in a distorted bent 150 degrees geometry to one Co(4) and one P(4) atom. In the twenty-seventh O site, O(27) is bonded in a bent 150 degrees geometry to one Co(4) and one P(1) atom. In the twenty-eighth O site, O(28) is bonded in a bent 150 degrees geometry to one Co(1) and one P(2) atom. is represented by the CIF file [CIF]
data_Co3(P2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.661
_cell_length_b   6.961
_cell_length_c   7.286
_cell_angle_alpha   95.598
_cell_angle_beta   90.536
_cell_angle_gamma   106.368
_symmetry_Int_Tables_number   1
_cell_volume   273.959
_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  0.000  0.001  0.002  1.0
  Co  Co1  1  0.359  0.520  0.328  1.0
  Co  Co2  1  0.652  0.483  0.674  1.0
  O  O3  1  0.763  0.138  0.092  1.0
  O  O4  1  0.232  0.862  0.907  1.0
  O  O5  1  0.424  0.293  0.194  1.0
  O  O6  1  0.567  0.708  0.793  1.0
  O  O7  1  0.861  0.514  0.152  1.0
  O  O8  1  0.135  0.486  0.851  1.0
  O  O9  1  0.306  0.357  0.558  1.0
  O  O10  1  0.695  0.636  0.449  1.0
  O  O11  1  0.856  0.335  0.571  1.0
  O  O12  1  0.148  0.664  0.426  1.0
  O  O13  1  0.584  0.333  0.876  1.0
  O  O14  1  0.425  0.673  0.119  1.0
  O  O15  1  0.966  0.888  0.245  1.0
  O  O16  1  0.026  0.111  0.763  1.0
  P  P17  1  0.077  0.308  0.683  1.0
  P  P18  1  0.923  0.690  0.320  1.0
  P  P19  1  0.654  0.309  0.074  1.0
  P  P20  1  0.347  0.693  0.922  1.0
[/CIF]
.