The compound described by Li3(FeO2)4 crystallizes in the trigonal R-3m space group. Li(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form LiO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form FeO6 octahedra that share corners with six equivalent Li(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form FeO6 octahedra that share edges with six equivalent Li(1)O6 octahedra and edges with six equivalent Fe(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(1), one Fe(2), and two equivalent Fe(1) atoms to form OLi2Fe3 square pyramids that share corners with nine equivalent O(1)Li2Fe3 square pyramids, edges with four equivalent O(2)Li3Fe3 octahedra, and edges with four equivalent O(1)Li2Fe3 square pyramids. In the second O site, O(2) is bonded to three equivalent Li(1) and three equivalent Fe(1) atoms to form OLi3Fe3 octahedra that share corners with six equivalent O(2)Li3Fe3 octahedra and edges with twelve equivalent O(1)Li2Fe3 square pyramids. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li3(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.988
_cell_length_b   5.988
_cell_length_c   6.006
_cell_angle_alpha   60.134
_cell_angle_beta   89.934
_cell_angle_gamma   119.961
_symmetry_Int_Tables_number   1
_cell_volume   152.577
_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  0.500  1.0
  Li  Li1  1  0.500  0.500  0.500  1.0
  Li  Li2  1  0.500  0.000  0.500  1.0
  Fe  Fe3  1  0.000  0.500  0.000  1.0
  Fe  Fe4  1  0.000  0.000  0.000  1.0
  Fe  Fe5  1  0.500  0.500  0.000  1.0
  Fe  Fe6  1  0.500  0.000  0.000  1.0
  O  O7  1  0.254  0.987  0.779  1.0
  O  O8  1  0.266  0.533  0.221  1.0
  O  O9  1  0.241  0.482  0.777  1.0
  O  O10  1  0.267  0.013  0.220  1.0
  O  O11  1  0.733  0.987  0.780  1.0
  O  O12  1  0.759  0.518  0.223  1.0
  O  O13  1  0.734  0.467  0.779  1.0
  O  O14  1  0.746  0.013  0.221  1.0
[/CIF]
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The compound described by Li3(FeO2)4 crystallizes in the trigonal R-3m space group. Li(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form LiO6 octahedra that share corners with six equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form FeO6 octahedra that share corners with six equivalent Li(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, edges with four equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-8°. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form FeO6 octahedra that share edges with six equivalent Li(1)O6 octahedra and edges with six equivalent Fe(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Li(1), one Fe(2), and two equivalent Fe(1) atoms to form OLi2Fe3 square pyramids that share corners with nine equivalent O(1)Li2Fe3 square pyramids, edges with four equivalent O(2)Li3Fe3 octahedra, and edges with four equivalent O(1)Li2Fe3 square pyramids. In the second O site, O(2) is bonded to three equivalent Li(1) and three equivalent Fe(1) atoms to form OLi3Fe3 octahedra that share corners with six equivalent O(2)Li3Fe3 octahedra and edges with twelve equivalent O(1)Li2Fe3 square pyramids. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li3(FeO2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.988
_cell_length_b   5.988
_cell_length_c   6.006
_cell_angle_alpha   60.134
_cell_angle_beta   89.934
_cell_angle_gamma   119.961
_symmetry_Int_Tables_number   1
_cell_volume   152.577
_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  0.500  1.0
  Li  Li1  1  0.500  0.500  0.500  1.0
  Li  Li2  1  0.500  0.000  0.500  1.0
  Fe  Fe3  1  0.000  0.500  0.000  1.0
  Fe  Fe4  1  0.000  0.000  0.000  1.0
  Fe  Fe5  1  0.500  0.500  0.000  1.0
  Fe  Fe6  1  0.500  0.000  0.000  1.0
  O  O7  1  0.254  0.987  0.779  1.0
  O  O8  1  0.266  0.533  0.221  1.0
  O  O9  1  0.241  0.482  0.777  1.0
  O  O10  1  0.267  0.013  0.220  1.0
  O  O11  1  0.733  0.987  0.780  1.0
  O  O12  1  0.759  0.518  0.223  1.0
  O  O13  1  0.734  0.467  0.779  1.0
  O  O14  1  0.746  0.013  0.221  1.0
[/CIF]
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