The crystal structure described by FeCo(PO4)2 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 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 49°. Co(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share corners with four equivalent Fe(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 49°. 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 Fe(1)O6 octahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-56°. 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 Fe(1)O6 octahedra, corners with three equivalent Co(1)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(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 3-coordinate geometry to one Fe(1), one Co(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Co(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Fe(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 Crystallographic Information File (CIF) [CIF]
data_FeCo(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.848
_cell_length_b   4.822
_cell_length_c   9.904
_cell_angle_alpha   89.481
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   279.258
_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
  Fe  Fe0  1  0.750  0.463  0.775  1.0
  Fe  Fe1  1  0.250  0.537  0.225  1.0
  Co  Co2  1  0.250  0.939  0.718  1.0
  Co  Co3  1  0.750  0.061  0.282  1.0
  P  P4  1  0.250  0.411  0.899  1.0
  P  P5  1  0.750  0.924  0.592  1.0
  P  P6  1  0.250  0.076  0.408  1.0
  P  P7  1  0.750  0.589  0.101  1.0
  O  O8  1  0.750  0.651  0.949  1.0
  O  O9  1  0.250  0.731  0.882  1.0
  O  O10  1  0.044  0.268  0.826  1.0
  O  O11  1  0.456  0.268  0.826  1.0
  O  O12  1  0.953  0.773  0.671  1.0
  O  O13  1  0.547  0.773  0.671  1.0
  O  O14  1  0.750  0.235  0.611  1.0
  O  O15  1  0.250  0.161  0.557  1.0
  O  O16  1  0.750  0.839  0.443  1.0
  O  O17  1  0.250  0.765  0.389  1.0
  O  O18  1  0.047  0.227  0.329  1.0
  O  O19  1  0.453  0.227  0.329  1.0
  O  O20  1  0.544  0.732  0.174  1.0
  O  O21  1  0.956  0.732  0.174  1.0
  O  O22  1  0.750  0.269  0.118  1.0
  O  O23  1  0.250  0.349  0.051  1.0
[/CIF]
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The crystal structure described by FeCo(PO4)2 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 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 49°. Co(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share corners with four equivalent Fe(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 49°. 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 Fe(1)O6 octahedra, and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-56°. 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 Fe(1)O6 octahedra, corners with three equivalent Co(1)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(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 3-coordinate geometry to one Fe(1), one Co(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Co(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Fe(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 Crystallographic Information File (CIF) [CIF]
data_FeCo(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.848
_cell_length_b   4.822
_cell_length_c   9.904
_cell_angle_alpha   89.481
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   279.258
_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
  Fe  Fe0  1  0.750  0.463  0.775  1.0
  Fe  Fe1  1  0.250  0.537  0.225  1.0
  Co  Co2  1  0.250  0.939  0.718  1.0
  Co  Co3  1  0.750  0.061  0.282  1.0
  P  P4  1  0.250  0.411  0.899  1.0
  P  P5  1  0.750  0.924  0.592  1.0
  P  P6  1  0.250  0.076  0.408  1.0
  P  P7  1  0.750  0.589  0.101  1.0
  O  O8  1  0.750  0.651  0.949  1.0
  O  O9  1  0.250  0.731  0.882  1.0
  O  O10  1  0.044  0.268  0.826  1.0
  O  O11  1  0.456  0.268  0.826  1.0
  O  O12  1  0.953  0.773  0.671  1.0
  O  O13  1  0.547  0.773  0.671  1.0
  O  O14  1  0.750  0.235  0.611  1.0
  O  O15  1  0.250  0.161  0.557  1.0
  O  O16  1  0.750  0.839  0.443  1.0
  O  O17  1  0.250  0.765  0.389  1.0
  O  O18  1  0.047  0.227  0.329  1.0
  O  O19  1  0.453  0.227  0.329  1.0
  O  O20  1  0.544  0.732  0.174  1.0
  O  O21  1  0.956  0.732  0.174  1.0
  O  O22  1  0.750  0.269  0.118  1.0
  O  O23  1  0.250  0.349  0.051  1.0
[/CIF]
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