The compound described by Li3Fe4SbO8 is Caswellsilverite-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form LiO6 octahedra that share corners with six equivalent Fe(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-10°. In the second Li site, Li(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form LiO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Fe(3)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with six equivalent Li(1)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-10°. In the third Fe site, Fe(3) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. Sb(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form SbO6 octahedra that share corners with six equivalent Li(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), two equivalent Fe(2), and one Sb(1) atom to form OLi3Fe2Sb octahedra that share corners with six equivalent O(1)Li3Fe2Sb octahedra, edges with four equivalent O(3)Li2Fe4 octahedra, and edges with eight equivalent O(2)Li2Fe3Sb octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Fe(1), one Fe(2), one Fe(3), and one Sb(1) atom to form OLi2Fe3Sb octahedra that share corners with six equivalent O(2)Li2Fe3Sb octahedra, edges with four equivalent O(2)Li2Fe3Sb octahedra, edges with four equivalent O(3)Li2Fe4 octahedra, and edges with four equivalent O(1)Li3Fe2Sb octahedra. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded to two equivalent Li(1), one Fe(1), one Fe(3), and two equivalent Fe(2) atoms to form OLi2Fe4 octahedra that share corners with six equivalent O(3)Li2Fe4 octahedra, edges with four equivalent O(1)Li3Fe2Sb octahedra, and edges with eight equivalent O(2)Li2Fe3Sb octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Li3Fe4SbO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.079
_cell_length_b   6.079
_cell_length_c   6.282
_cell_angle_alpha   59.889
_cell_angle_beta   59.889
_cell_angle_gamma   62.393
_symmetry_Int_Tables_number   1
_cell_volume   166.655
_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  0.000  0.500  0.000  1.0
  Li  Li1  1  0.500  0.000  0.000  1.0
  Li  Li2  1  0.000  0.000  0.500  1.0
  Fe  Fe3  1  0.000  0.000  0.000  1.0
  Fe  Fe4  1  0.500  0.000  0.500  1.0
  Fe  Fe5  1  0.000  0.500  0.500  1.0
  Fe  Fe6  1  0.500  0.500  0.500  1.0
  Sb  Sb7  1  0.500  0.500  0.000  1.0
  O  O8  1  0.739  0.739  0.754  1.0
  O  O9  1  0.278  0.735  0.224  1.0
  O  O10  1  0.735  0.278  0.224  1.0
  O  O11  1  0.261  0.261  0.246  1.0
  O  O12  1  0.249  0.249  0.729  1.0
  O  O13  1  0.722  0.265  0.776  1.0
  O  O14  1  0.265  0.722  0.776  1.0
  O  O15  1  0.751  0.751  0.271  1.0
[/CIF]
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The compound described by Li3Fe4SbO8 is Caswellsilverite-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form LiO6 octahedra that share corners with six equivalent Fe(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-10°. In the second Li site, Li(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form LiO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Fe(3)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with six equivalent Li(1)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, and edges with two equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-10°. In the third Fe site, Fe(3) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Sb(1)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-10°. Sb(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form SbO6 octahedra that share corners with six equivalent Li(2)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(3)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-3°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), two equivalent Li(1), two equivalent Fe(2), and one Sb(1) atom to form OLi3Fe2Sb octahedra that share corners with six equivalent O(1)Li3Fe2Sb octahedra, edges with four equivalent O(3)Li2Fe4 octahedra, and edges with eight equivalent O(2)Li2Fe3Sb octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Fe(1), one Fe(2), one Fe(3), and one Sb(1) atom to form OLi2Fe3Sb octahedra that share corners with six equivalent O(2)Li2Fe3Sb octahedra, edges with four equivalent O(2)Li2Fe3Sb octahedra, edges with four equivalent O(3)Li2Fe4 octahedra, and edges with four equivalent O(1)Li3Fe2Sb octahedra. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded to two equivalent Li(1), one Fe(1), one Fe(3), and two equivalent Fe(2) atoms to form OLi2Fe4 octahedra that share corners with six equivalent O(3)Li2Fe4 octahedra, edges with four equivalent O(1)Li3Fe2Sb octahedra, and edges with eight equivalent O(2)Li2Fe3Sb octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_Li3Fe4SbO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.079
_cell_length_b   6.079
_cell_length_c   6.282
_cell_angle_alpha   59.889
_cell_angle_beta   59.889
_cell_angle_gamma   62.393
_symmetry_Int_Tables_number   1
_cell_volume   166.655
_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  0.000  0.500  0.000  1.0
  Li  Li1  1  0.500  0.000  0.000  1.0
  Li  Li2  1  0.000  0.000  0.500  1.0
  Fe  Fe3  1  0.000  0.000  0.000  1.0
  Fe  Fe4  1  0.500  0.000  0.500  1.0
  Fe  Fe5  1  0.000  0.500  0.500  1.0
  Fe  Fe6  1  0.500  0.500  0.500  1.0
  Sb  Sb7  1  0.500  0.500  0.000  1.0
  O  O8  1  0.739  0.739  0.754  1.0
  O  O9  1  0.278  0.735  0.224  1.0
  O  O10  1  0.735  0.278  0.224  1.0
  O  O11  1  0.261  0.261  0.246  1.0
  O  O12  1  0.249  0.249  0.729  1.0
  O  O13  1  0.722  0.265  0.776  1.0
  O  O14  1  0.265  0.722  0.776  1.0
  O  O15  1  0.751  0.751  0.271  1.0
[/CIF]
.