The structure described by Co3(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 59-63°. In the second Co site, Co(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, corners with four equivalent P(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-63°. 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  a cornercorner with one Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one P(1) atom. is represented by the CIF card [CIF]
data_Co3(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.734
_cell_length_b   5.903
_cell_length_c   10.237
_cell_angle_alpha   91.469
_cell_angle_beta   90.000
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   285.960
_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  0.500  0.500  0.500  1.0
  Co  Co1  1  0.017  0.764  0.726  1.0
  Co  Co2  1  0.483  0.764  0.226  1.0
  Co  Co3  1  1.000  0.500  1.000  1.0
  Co  Co4  1  0.517  0.236  0.774  1.0
  Co  Co5  1  0.983  0.236  0.274  1.0
  P  P6  1  0.071  0.257  0.596  1.0
  P  P7  1  0.429  0.257  0.097  1.0
  P  P8  1  0.571  0.743  0.904  1.0
  P  P9  1  0.929  0.743  0.403  1.0
  O  O10  1  0.722  0.529  0.840  1.0
  O  O11  1  0.222  0.471  0.660  1.0
  O  O12  1  0.278  0.471  0.160  1.0
  O  O13  1  0.778  0.529  0.340  1.0
  O  O14  1  0.186  0.250  0.456  1.0
  O  O15  1  0.686  0.750  0.044  1.0
  O  O16  1  0.314  0.249  0.956  1.0
  O  O17  1  0.814  0.751  0.544  1.0
  O  O18  1  0.251  0.726  0.398  1.0
  O  O19  1  0.750  0.274  0.602  1.0
  O  O20  1  0.250  0.726  0.898  1.0
  O  O21  1  0.751  0.274  0.102  1.0
  O  O22  1  0.684  0.936  0.820  1.0
  O  O23  1  0.816  0.936  0.320  1.0
  O  O24  1  0.316  0.064  0.180  1.0
  O  O25  1  0.184  0.064  0.680  1.0
[/CIF]
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The structure described by Co3(PO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 59-63°. In the second Co site, Co(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, corners with four equivalent P(1)O4 tetrahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-63°. 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  a cornercorner with one Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Co(2) and one P(1) atom. is represented by the CIF card [CIF]
data_Co3(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.734
_cell_length_b   5.903
_cell_length_c   10.237
_cell_angle_alpha   91.469
_cell_angle_beta   90.000
_cell_angle_gamma   90.001
_symmetry_Int_Tables_number   1
_cell_volume   285.960
_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  0.500  0.500  0.500  1.0
  Co  Co1  1  0.017  0.764  0.726  1.0
  Co  Co2  1  0.483  0.764  0.226  1.0
  Co  Co3  1  1.000  0.500  1.000  1.0
  Co  Co4  1  0.517  0.236  0.774  1.0
  Co  Co5  1  0.983  0.236  0.274  1.0
  P  P6  1  0.071  0.257  0.596  1.0
  P  P7  1  0.429  0.257  0.097  1.0
  P  P8  1  0.571  0.743  0.904  1.0
  P  P9  1  0.929  0.743  0.403  1.0
  O  O10  1  0.722  0.529  0.840  1.0
  O  O11  1  0.222  0.471  0.660  1.0
  O  O12  1  0.278  0.471  0.160  1.0
  O  O13  1  0.778  0.529  0.340  1.0
  O  O14  1  0.186  0.250  0.456  1.0
  O  O15  1  0.686  0.750  0.044  1.0
  O  O16  1  0.314  0.249  0.956  1.0
  O  O17  1  0.814  0.751  0.544  1.0
  O  O18  1  0.251  0.726  0.398  1.0
  O  O19  1  0.750  0.274  0.602  1.0
  O  O20  1  0.250  0.726  0.898  1.0
  O  O21  1  0.751  0.274  0.102  1.0
  O  O22  1  0.684  0.936  0.820  1.0
  O  O23  1  0.816  0.936  0.320  1.0
  O  O24  1  0.316  0.064  0.180  1.0
  O  O25  1  0.184  0.064  0.680  1.0
[/CIF]
.