The material described by Li4Fe3Co(PO4)4 is Hausmannite-derived structured and crystallizes in the monoclinic Pm space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form LiO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Li(1)O6 octahedra,  an edgeedge with one P(2)O4 tetrahedra, and  an edgeedge with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-69°. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(11), one O(12), one O(2), and one O(3) atom to form LiO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-69°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(7), two equivalent O(11), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Li(1)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the second Fe site, Fe(2) is bonded to one O(10), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with four equivalent Li(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the third Fe site, Fe(3) is bonded to one O(1), one O(9), two equivalent O(11), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Li(2)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. Co(1) is bonded to one O(12), one O(4), two equivalent O(2), and two equivalent O(8) atoms to form CoO6 octahedra that share corners with four equivalent Li(2)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-68°. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), and two equivalent O(2) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and edges with two equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-59°. In the second P site, P(2) is bonded to one O(6), one O(9), and two equivalent O(5) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and edges with two equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-59°. In the third P site, P(3) is bonded to one O(4), one O(7), and two equivalent O(8) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with two equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-59°. In the fourth P site, P(4) is bonded to one O(12), one O(3), and two equivalent O(11) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and edges with two equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-59°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Li(2), one Fe(3), and one P(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Fe(2), one Co(1), and one P(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Fe(1), and one P(4) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Co(1), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Fe(1), one Fe(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1), one Fe(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1), one Fe(1), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Fe(2), one Co(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Fe(3), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(2), one Fe(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Fe(1), one Fe(3), and one P(4) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to two equivalent Li(2), one Co(1), and one P(4) atom. is represented by the CIF file [CIF]
data_Li4Fe3Co(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.060
_cell_length_b   4.741
_cell_length_c   10.401
_cell_angle_alpha   89.900
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   298.810
_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
  Li  Li0  1  0.250  0.000  0.000  1.0
  Li  Li1  1  0.750  0.000  0.000  1.0
  Li  Li2  1  0.750  0.500  0.500  1.0
  Li  Li3  1  0.250  0.500  0.500  1.0
  Fe  Fe4  1  0.000  0.474  0.781  1.0
  Fe  Fe5  1  0.500  0.525  0.219  1.0
  Fe  Fe6  1  0.500  0.974  0.718  1.0
  Co  Co7  1  0.000  0.024  0.280  1.0
  P  P8  1  0.500  0.083  0.405  1.0
  P  P9  1  0.500  0.418  0.906  1.0
  P  P10  1  0.000  0.582  0.095  1.0
  P  P11  1  0.000  0.918  0.594  1.0
  O  O12  1  0.500  0.206  0.544  1.0
  O  O13  1  0.296  0.217  0.334  1.0
  O  O14  1  0.704  0.217  0.334  1.0
  O  O15  1  0.000  0.242  0.597  1.0
  O  O16  1  0.000  0.258  0.098  1.0
  O  O17  1  0.296  0.283  0.835  1.0
  O  O18  1  0.704  0.283  0.835  1.0
  O  O19  1  0.500  0.294  0.044  1.0
  O  O20  1  0.000  0.706  0.956  1.0
  O  O21  1  0.796  0.717  0.166  1.0
  O  O22  1  0.204  0.717  0.166  1.0
  O  O23  1  0.500  0.742  0.903  1.0
  O  O24  1  0.500  0.758  0.403  1.0
  O  O25  1  0.796  0.783  0.666  1.0
  O  O26  1  0.204  0.783  0.666  1.0
  O  O27  1  0.000  0.794  0.456  1.0
[/CIF]
.
The material described by Li4Fe3Co(PO4)4 is Hausmannite-derived structured and crystallizes in the monoclinic Pm space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form LiO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  an edgeedge with one Fe(3)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Li(1)O6 octahedra,  an edgeedge with one P(2)O4 tetrahedra, and  an edgeedge with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-69°. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(11), one O(12), one O(2), and one O(3) atom to form LiO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-69°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(3), one O(7), two equivalent O(11), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Li(1)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the second Fe site, Fe(2) is bonded to one O(10), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with four equivalent Li(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the third Fe site, Fe(3) is bonded to one O(1), one O(9), two equivalent O(11), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Li(2)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. Co(1) is bonded to one O(12), one O(4), two equivalent O(2), and two equivalent O(8) atoms to form CoO6 octahedra that share corners with four equivalent Li(2)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-68°. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), and two equivalent O(2) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, and edges with two equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-59°. In the second P site, P(2) is bonded to one O(6), one O(9), and two equivalent O(5) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O6 octahedra, and edges with two equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-59°. In the third P site, P(3) is bonded to one O(4), one O(7), and two equivalent O(8) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with two equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-59°. In the fourth P site, P(4) is bonded to one O(12), one O(3), and two equivalent O(11) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and edges with two equivalent Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-59°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent Li(2), one Fe(3), and one P(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Fe(2), one Co(1), and one P(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Fe(1), and one P(4) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Co(1), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Fe(1), one Fe(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1), one Fe(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1), one Fe(1), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Fe(2), one Co(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Fe(3), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(2), one Fe(2), and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), one Fe(1), one Fe(3), and one P(4) atom. In the twelfth O site, O(12) is bonded in a rectangular see-saw-like geometry to two equivalent Li(2), one Co(1), and one P(4) atom. is represented by the CIF file [CIF]
data_Li4Fe3Co(PO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.060
_cell_length_b   4.741
_cell_length_c   10.401
_cell_angle_alpha   89.900
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   298.810
_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
  Li  Li0  1  0.250  0.000  0.000  1.0
  Li  Li1  1  0.750  0.000  0.000  1.0
  Li  Li2  1  0.750  0.500  0.500  1.0
  Li  Li3  1  0.250  0.500  0.500  1.0
  Fe  Fe4  1  0.000  0.474  0.781  1.0
  Fe  Fe5  1  0.500  0.525  0.219  1.0
  Fe  Fe6  1  0.500  0.974  0.718  1.0
  Co  Co7  1  0.000  0.024  0.280  1.0
  P  P8  1  0.500  0.083  0.405  1.0
  P  P9  1  0.500  0.418  0.906  1.0
  P  P10  1  0.000  0.582  0.095  1.0
  P  P11  1  0.000  0.918  0.594  1.0
  O  O12  1  0.500  0.206  0.544  1.0
  O  O13  1  0.296  0.217  0.334  1.0
  O  O14  1  0.704  0.217  0.334  1.0
  O  O15  1  0.000  0.242  0.597  1.0
  O  O16  1  0.000  0.258  0.098  1.0
  O  O17  1  0.296  0.283  0.835  1.0
  O  O18  1  0.704  0.283  0.835  1.0
  O  O19  1  0.500  0.294  0.044  1.0
  O  O20  1  0.000  0.706  0.956  1.0
  O  O21  1  0.796  0.717  0.166  1.0
  O  O22  1  0.204  0.717  0.166  1.0
  O  O23  1  0.500  0.742  0.903  1.0
  O  O24  1  0.500  0.758  0.403  1.0
  O  O25  1  0.796  0.783  0.666  1.0
  O  O26  1  0.204  0.783  0.666  1.0
  O  O27  1  0.000  0.794  0.456  1.0
[/CIF]
.