The material structure described by CoNi(PO4)2 crystallizes in the monoclinic P2_1/m space group. Co(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. Ni(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form NiO6 octahedra that share corners with four equivalent Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Ni(1)O6 octahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra, corners with three equivalent Co(1)O6 octahedra, and  an edgeedge with one Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ni(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) 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 Ni(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Co(1), one Ni(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ni(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(1) and one P(2) atom. is represented by the CIF card [CIF]
data_CoNi(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.803
_cell_length_b   4.787
_cell_length_c   9.883
_cell_angle_alpha   89.704
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   274.545
_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  0.250  0.945  0.721  1.0
  Co  Co1  1  0.750  0.055  0.279  1.0
  Ni  Ni2  1  0.750  0.453  0.772  1.0
  Ni  Ni3  1  0.250  0.547  0.228  1.0
  P  P4  1  0.250  0.400  0.902  1.0
  P  P5  1  0.750  0.921  0.593  1.0
  P  P6  1  0.250  0.079  0.407  1.0
  P  P7  1  0.750  0.600  0.098  1.0
  O  O8  1  0.750  0.658  0.946  1.0
  O  O9  1  0.250  0.720  0.882  1.0
  O  O10  1  0.045  0.251  0.829  1.0
  O  O11  1  0.455  0.251  0.829  1.0
  O  O12  1  0.542  0.773  0.669  1.0
  O  O13  1  0.958  0.773  0.669  1.0
  O  O14  1  0.750  0.236  0.604  1.0
  O  O15  1  0.250  0.169  0.557  1.0
  O  O16  1  0.750  0.831  0.443  1.0
  O  O17  1  0.250  0.764  0.396  1.0
  O  O18  1  0.042  0.227  0.331  1.0
  O  O19  1  0.458  0.227  0.331  1.0
  O  O20  1  0.545  0.749  0.171  1.0
  O  O21  1  0.955  0.749  0.171  1.0
  O  O22  1  0.750  0.280  0.118  1.0
  O  O23  1  0.250  0.342  0.054  1.0
[/CIF]
.
The material structure described by CoNi(PO4)2 crystallizes in the monoclinic P2_1/m space group. Co(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form CoO6 octahedra that share corners with four equivalent Ni(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. Ni(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form NiO6 octahedra that share corners with four equivalent Co(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Ni(1)O6 octahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one Ni(1)O6 octahedra, corners with three equivalent Co(1)O6 octahedra, and  an edgeedge with one Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ni(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) 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 Ni(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Co(1), one Ni(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Ni(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(1) and one P(2) atom. is represented by the CIF card [CIF]
data_CoNi(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.803
_cell_length_b   4.787
_cell_length_c   9.883
_cell_angle_alpha   89.704
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   274.545
_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  0.250  0.945  0.721  1.0
  Co  Co1  1  0.750  0.055  0.279  1.0
  Ni  Ni2  1  0.750  0.453  0.772  1.0
  Ni  Ni3  1  0.250  0.547  0.228  1.0
  P  P4  1  0.250  0.400  0.902  1.0
  P  P5  1  0.750  0.921  0.593  1.0
  P  P6  1  0.250  0.079  0.407  1.0
  P  P7  1  0.750  0.600  0.098  1.0
  O  O8  1  0.750  0.658  0.946  1.0
  O  O9  1  0.250  0.720  0.882  1.0
  O  O10  1  0.045  0.251  0.829  1.0
  O  O11  1  0.455  0.251  0.829  1.0
  O  O12  1  0.542  0.773  0.669  1.0
  O  O13  1  0.958  0.773  0.669  1.0
  O  O14  1  0.750  0.236  0.604  1.0
  O  O15  1  0.250  0.169  0.557  1.0
  O  O16  1  0.750  0.831  0.443  1.0
  O  O17  1  0.250  0.764  0.396  1.0
  O  O18  1  0.042  0.227  0.331  1.0
  O  O19  1  0.458  0.227  0.331  1.0
  O  O20  1  0.545  0.749  0.171  1.0
  O  O21  1  0.955  0.749  0.171  1.0
  O  O22  1  0.750  0.280  0.118  1.0
  O  O23  1  0.250  0.342  0.054  1.0
[/CIF]
.