The material described by Li4Nb3Fe3(SbO8)2 is beta indium sulfide-derived structured and crystallizes in the monoclinic Cm space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(3), and two equivalent O(9) atoms to form LiO4 tetrahedra that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, and corners with four equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the second Li site, Li(2) is bonded in a rectangular see-saw-like geometry to one O(5), one O(7), and two equivalent O(11) atoms. In the third Li site, Li(3) is bonded in a rectangular see-saw-like geometry to one O(4), one O(8), and two equivalent O(1) atoms. In the fourth Li site, Li(4) is bonded to one O(10), one O(2), and two equivalent O(6) atoms to form LiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-64°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(3), one O(4), two equivalent O(11), and two equivalent O(6) atoms to form NbO6 octahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. In the second Nb site, Nb(2) is bonded to one O(1), one O(10), one O(12), one O(5), one O(8), and one O(9) atom to form NbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, edges with two equivalent Nb(2)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(11), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form FeO6 octahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Nb(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. In the second Fe site, Fe(2) is bonded to one O(10), one O(5), two equivalent O(1), and two equivalent O(9) atoms to form FeO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, and edges with four equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form distorted SbO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with four equivalent Nb(2)O6 octahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-58°. In the second Sb site, Sb(2) is bonded in a 3-coordinate geometry to one O(7) and two equivalent O(11) atoms. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(2), one Fe(2), and one Sb(1) atom. In the second O site, O(2) is bonded to one Li(4), two equivalent Fe(1), and one Sb(1) atom to form corner-sharing OLiFe2Sb tetrahedra. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Nb(1), and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded to one Li(3), one Nb(1), and two equivalent Fe(1) atoms to form distorted corner-sharing OLiNbFe2 tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal pyramidal geometry to one Li(2), two equivalent Nb(2), and one Fe(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Li(4), one Nb(1), one Fe(1), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), two equivalent Fe(1), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(3), two equivalent Nb(2), and one Sb(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Li(1), one Nb(2), and one Fe(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Li(4), two equivalent Nb(2), and one Fe(2) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(1), one Fe(1), and one Sb(2) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(1) and two equivalent Nb(2) atoms. is represented by the CIF file [CIF]
data_Li4Nb3Fe3(SbO8)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.178
_cell_length_b   6.178
_cell_length_c   10.554
_cell_angle_alpha   89.251
_cell_angle_beta   89.251
_cell_angle_gamma   59.418
_symmetry_Int_Tables_number   1
_cell_volume   346.732
_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  0.669  0.669  0.098  1.0
  Li  Li1  1  0.001  0.001  0.997  1.0
  Li  Li2  1  0.003  0.003  0.511  1.0
  Li  Li3  1  0.336  0.336  0.611  1.0
  Nb  Nb4  1  0.827  0.827  0.770  1.0
  Nb  Nb5  1  0.660  0.163  0.281  1.0
  Nb  Nb6  1  0.163  0.660  0.281  1.0
  Fe  Fe7  1  0.817  0.346  0.787  1.0
  Fe  Fe8  1  0.346  0.817  0.787  1.0
  Fe  Fe9  1  0.168  0.168  0.292  1.0
  Sb  Sb10  1  0.646  0.646  0.507  1.0
  Sb  Sb11  1  0.324  0.324  0.980  1.0
  O  O12  1  0.835  0.305  0.402  1.0
  O  O13  1  0.518  0.518  0.657  1.0
  O  O14  1  0.680  0.680  0.895  1.0
  O  O15  1  0.996  0.996  0.691  1.0
  O  O16  1  0.998  0.998  0.181  1.0
  O  O17  1  0.305  0.835  0.402  1.0
  O  O18  1  0.980  0.520  0.673  1.0
  O  O19  1  0.520  0.980  0.673  1.0
  O  O20  1  0.157  0.157  0.891  1.0
  O  O21  1  0.856  0.856  0.393  1.0
  O  O22  1  0.505  0.017  0.184  1.0
  O  O23  1  0.017  0.505  0.184  1.0
  O  O24  1  0.345  0.345  0.395  1.0
  O  O25  1  0.678  0.161  0.893  1.0
  O  O26  1  0.493  0.493  0.181  1.0
  O  O27  1  0.161  0.678  0.893  1.0
[/CIF]
.
The material described by Li4Nb3Fe3(SbO8)2 is beta indium sulfide-derived structured and crystallizes in the monoclinic Cm space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(3), and two equivalent O(9) atoms to form LiO4 tetrahedra that share  a cornercorner with one Nb(1)O6 octahedra, corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, and corners with four equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the second Li site, Li(2) is bonded in a rectangular see-saw-like geometry to one O(5), one O(7), and two equivalent O(11) atoms. In the third Li site, Li(3) is bonded in a rectangular see-saw-like geometry to one O(4), one O(8), and two equivalent O(1) atoms. In the fourth Li site, Li(4) is bonded to one O(10), one O(2), and two equivalent O(6) atoms to form LiO4 tetrahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, corners with three equivalent Sb(1)O6 octahedra, and corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-64°. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(3), one O(4), two equivalent O(11), and two equivalent O(6) atoms to form NbO6 octahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. In the second Nb site, Nb(2) is bonded to one O(1), one O(10), one O(12), one O(5), one O(8), and one O(9) atom to form NbO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, edges with two equivalent Nb(2)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-58°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(11), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form FeO6 octahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra,  an edgeedge with one Sb(1)O6 octahedra, edges with two equivalent Nb(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. In the second Fe site, Fe(2) is bonded to one O(10), one O(5), two equivalent O(1), and two equivalent O(9) atoms to form FeO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, and edges with four equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(2), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form distorted SbO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with four equivalent Nb(2)O6 octahedra, corners with three equivalent Li(4)O4 tetrahedra,  an edgeedge with one Nb(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-58°. In the second Sb site, Sb(2) is bonded in a 3-coordinate geometry to one O(7) and two equivalent O(11) atoms. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Li(3), one Nb(2), one Fe(2), and one Sb(1) atom. In the second O site, O(2) is bonded to one Li(4), two equivalent Fe(1), and one Sb(1) atom to form corner-sharing OLiFe2Sb tetrahedra. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Nb(1), and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded to one Li(3), one Nb(1), and two equivalent Fe(1) atoms to form distorted corner-sharing OLiNbFe2 tetrahedra. In the fifth O site, O(5) is bonded in a distorted trigonal pyramidal geometry to one Li(2), two equivalent Nb(2), and one Fe(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Li(4), one Nb(1), one Fe(1), and one Sb(1) atom. In the seventh O site, O(7) is bonded in a distorted rectangular see-saw-like geometry to one Li(2), two equivalent Fe(1), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(3), two equivalent Nb(2), and one Sb(1) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Li(1), one Nb(2), and one Fe(2) atom. In the tenth O site, O(10) is bonded in a rectangular see-saw-like geometry to one Li(4), two equivalent Nb(2), and one Fe(2) atom. In the eleventh O site, O(11) is bonded in a rectangular see-saw-like geometry to one Li(2), one Nb(1), one Fe(1), and one Sb(2) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(1) and two equivalent Nb(2) atoms. is represented by the CIF file [CIF]
data_Li4Nb3Fe3(SbO8)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.178
_cell_length_b   6.178
_cell_length_c   10.554
_cell_angle_alpha   89.251
_cell_angle_beta   89.251
_cell_angle_gamma   59.418
_symmetry_Int_Tables_number   1
_cell_volume   346.732
_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  0.669  0.669  0.098  1.0
  Li  Li1  1  0.001  0.001  0.997  1.0
  Li  Li2  1  0.003  0.003  0.511  1.0
  Li  Li3  1  0.336  0.336  0.611  1.0
  Nb  Nb4  1  0.827  0.827  0.770  1.0
  Nb  Nb5  1  0.660  0.163  0.281  1.0
  Nb  Nb6  1  0.163  0.660  0.281  1.0
  Fe  Fe7  1  0.817  0.346  0.787  1.0
  Fe  Fe8  1  0.346  0.817  0.787  1.0
  Fe  Fe9  1  0.168  0.168  0.292  1.0
  Sb  Sb10  1  0.646  0.646  0.507  1.0
  Sb  Sb11  1  0.324  0.324  0.980  1.0
  O  O12  1  0.835  0.305  0.402  1.0
  O  O13  1  0.518  0.518  0.657  1.0
  O  O14  1  0.680  0.680  0.895  1.0
  O  O15  1  0.996  0.996  0.691  1.0
  O  O16  1  0.998  0.998  0.181  1.0
  O  O17  1  0.305  0.835  0.402  1.0
  O  O18  1  0.980  0.520  0.673  1.0
  O  O19  1  0.520  0.980  0.673  1.0
  O  O20  1  0.157  0.157  0.891  1.0
  O  O21  1  0.856  0.856  0.393  1.0
  O  O22  1  0.505  0.017  0.184  1.0
  O  O23  1  0.017  0.505  0.184  1.0
  O  O24  1  0.345  0.345  0.395  1.0
  O  O25  1  0.678  0.161  0.893  1.0
  O  O26  1  0.493  0.493  0.181  1.0
  O  O27  1  0.161  0.678  0.893  1.0
[/CIF]
.