The crystal structure described by Li4CrFe(WO6)2 is Ilmenite-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(4), one O(7), one O(8), and one O(9) atom. In the second Li site, Li(2) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(2), one O(3), one O(5), and one O(6) atom. In the third Li site, Li(3) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom. In the fourth Li site, Li(4) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(4), and one O(7) atom. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(9) atom to form distorted WO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-42°. In the second W site, W(2) is bonded to one O(10), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form WO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-40°. Cr(1) is bonded to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(8) atom to form distorted CrO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-38°. Fe(1) is bonded to one O(1), one O(12), one O(4), one O(6), one O(7), and one O(9) atom to form FeO6 octahedra that share corners with two equivalent W(2)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-42°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(4), one W(1), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing OLi2FeW trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Li(2), one Li(3), one W(1), and one Cr(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(2), one Li(4), one W(2), and one Cr(1) atom. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Li(1), one Li(4), one W(1), and one Fe(1) atom. In the fifth O site, O(5) is bonded to one Li(2), one Li(3), one W(2), and one Cr(1) atom to form a mixture of distorted corner and edge-sharing OLi2CrW tetrahedra. In the sixth O site, O(6) is bonded to one Li(2), one Li(3), one W(2), and one Fe(1) atom to form distorted OLi2FeW tetrahedra that share  a cornercorner with one O(5)Li2CrW tetrahedra, corners with two equivalent O(9)Li2FeW tetrahedra,  a cornercorner with one O(1)Li2FeW trigonal pyramid, and  an edgeedge with one O(5)Li2CrW tetrahedra. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Li(1), one Li(4), one W(2), and one Fe(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(1), one Li(3), one W(2), and one Cr(1) atom. In the ninth O site, O(9) is bonded to one Li(1), one Li(3), one W(1), and one Fe(1) atom to form distorted OLi2FeW tetrahedra that share  a cornercorner with one O(5)Li2CrW tetrahedra, corners with two equivalent O(6)Li2FeW tetrahedra,  a cornercorner with one O(1)Li2FeW trigonal pyramid, and  an edgeedge with one O(1)Li2FeW trigonal pyramid. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Li(2), one Li(3), one W(2), and one Cr(1) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(1), one Li(4), one W(1), and one Cr(1) atom. In the twelfth O site, O(12) is bonded in a distorted see-saw-like geometry to one Li(2), one Li(4), one W(1), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Li4CrFe(WO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.105
_cell_length_b   5.408
_cell_length_c   7.507
_cell_angle_alpha   85.905
_cell_angle_beta   89.946
_cell_angle_gamma   89.959
_symmetry_Int_Tables_number   1
_cell_volume   206.713
_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  0.997  0.437  0.706  1.0
  Li  Li1  1  0.493  0.915  0.215  1.0
  Li  Li2  1  0.001  0.455  0.228  1.0
  Li  Li3  1  0.513  0.926  0.709  1.0
  Cr  Cr4  1  0.005  0.980  0.981  1.0
  Fe  Fe5  1  0.502  0.497  0.502  1.0
  W  W6  1  0.990  0.003  0.478  1.0
  W  W7  1  0.505  0.480  0.002  1.0
  O  O8  1  0.707  0.198  0.575  1.0
  O  O9  1  0.876  0.015  0.245  1.0
  O  O10  1  0.698  0.820  0.949  1.0
  O  O11  1  0.810  0.714  0.573  1.0
  O  O12  1  0.193  0.708  0.067  1.0
  O  O13  1  0.615  0.524  0.245  1.0
  O  O14  1  0.377  0.526  0.765  1.0
  O  O15  1  0.812  0.312  0.946  1.0
  O  O16  1  0.178  0.315  0.457  1.0
  O  O17  1  0.303  0.197  0.069  1.0
  O  O18  1  0.119  0.008  0.769  1.0
  O  O19  1  0.308  0.829  0.451  1.0
[/CIF]
.
The crystal structure described by Li4CrFe(WO6)2 is Ilmenite-derived structured and crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(4), one O(7), one O(8), and one O(9) atom. In the second Li site, Li(2) is bonded in a 6-coordinate geometry to one O(10), one O(12), one O(2), one O(3), one O(5), and one O(6) atom. In the third Li site, Li(3) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom. In the fourth Li site, Li(4) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(12), one O(3), one O(4), and one O(7) atom. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(9) atom to form distorted WO6 octahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-42°. In the second W site, W(2) is bonded to one O(10), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form WO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-40°. Cr(1) is bonded to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(8) atom to form distorted CrO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-38°. Fe(1) is bonded to one O(1), one O(12), one O(4), one O(6), one O(7), and one O(9) atom to form FeO6 octahedra that share corners with two equivalent W(2)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-42°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(4), one W(1), and one Fe(1) atom to form a mixture of distorted corner and edge-sharing OLi2FeW trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Li(2), one Li(3), one W(1), and one Cr(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Li(2), one Li(4), one W(2), and one Cr(1) atom. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Li(1), one Li(4), one W(1), and one Fe(1) atom. In the fifth O site, O(5) is bonded to one Li(2), one Li(3), one W(2), and one Cr(1) atom to form a mixture of distorted corner and edge-sharing OLi2CrW tetrahedra. In the sixth O site, O(6) is bonded to one Li(2), one Li(3), one W(2), and one Fe(1) atom to form distorted OLi2FeW tetrahedra that share  a cornercorner with one O(5)Li2CrW tetrahedra, corners with two equivalent O(9)Li2FeW tetrahedra,  a cornercorner with one O(1)Li2FeW trigonal pyramid, and  an edgeedge with one O(5)Li2CrW tetrahedra. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Li(1), one Li(4), one W(2), and one Fe(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(1), one Li(3), one W(2), and one Cr(1) atom. In the ninth O site, O(9) is bonded to one Li(1), one Li(3), one W(1), and one Fe(1) atom to form distorted OLi2FeW tetrahedra that share  a cornercorner with one O(5)Li2CrW tetrahedra, corners with two equivalent O(6)Li2FeW tetrahedra,  a cornercorner with one O(1)Li2FeW trigonal pyramid, and  an edgeedge with one O(1)Li2FeW trigonal pyramid. In the tenth O site, O(10) is bonded in a distorted see-saw-like geometry to one Li(2), one Li(3), one W(2), and one Cr(1) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(1), one Li(4), one W(1), and one Cr(1) atom. In the twelfth O site, O(12) is bonded in a distorted see-saw-like geometry to one Li(2), one Li(4), one W(1), and one Fe(1) atom. is represented by the CIF file [CIF]
data_Li4CrFe(WO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.105
_cell_length_b   5.408
_cell_length_c   7.507
_cell_angle_alpha   85.905
_cell_angle_beta   89.946
_cell_angle_gamma   89.959
_symmetry_Int_Tables_number   1
_cell_volume   206.713
_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  0.997  0.437  0.706  1.0
  Li  Li1  1  0.493  0.915  0.215  1.0
  Li  Li2  1  0.001  0.455  0.228  1.0
  Li  Li3  1  0.513  0.926  0.709  1.0
  Cr  Cr4  1  0.005  0.980  0.981  1.0
  Fe  Fe5  1  0.502  0.497  0.502  1.0
  W  W6  1  0.990  0.003  0.478  1.0
  W  W7  1  0.505  0.480  0.002  1.0
  O  O8  1  0.707  0.198  0.575  1.0
  O  O9  1  0.876  0.015  0.245  1.0
  O  O10  1  0.698  0.820  0.949  1.0
  O  O11  1  0.810  0.714  0.573  1.0
  O  O12  1  0.193  0.708  0.067  1.0
  O  O13  1  0.615  0.524  0.245  1.0
  O  O14  1  0.377  0.526  0.765  1.0
  O  O15  1  0.812  0.312  0.946  1.0
  O  O16  1  0.178  0.315  0.457  1.0
  O  O17  1  0.303  0.197  0.069  1.0
  O  O18  1  0.119  0.008  0.769  1.0
  O  O19  1  0.308  0.829  0.451  1.0
[/CIF]
.