The compound described by Li7Fe3O10 is Caswellsilverite-like structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form distorted LiO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with three equivalent Li(2)O6 octahedra, and edges with three equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-16°. In the second Li site, Li(2) is bonded to one O(1), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form distorted LiO6 octahedra that share  a cornercorner with one Li(4)O6 octahedra, corners with two equivalent Li(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, and edges with three equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-16°. In the third Li site, Li(3) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms. In the fourth Li site, Li(4) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form LiO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with two 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 Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(4)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-14°. In the second Fe site, Fe(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with three equivalent Li(2)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with three equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-14°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Li(3), one Fe(1), and two equivalent Fe(2) atoms to form distorted OLi3Fe3 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(5)Li5Fe octahedra,  an edgeedge with one O(1)Li3Fe3 octahedra, edges with two equivalent O(5)Li5Fe octahedra, edges with two equivalent O(3)Li6 octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(2)Li3Fe3 octahedra. The corner-sharing octahedral tilt angles range from 0-24°. In the second O site, O(2) is bonded to one Li(1), two equivalent Li(3), one Fe(1), and two equivalent Fe(2) atoms to form distorted OLi3Fe3 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(5)Li5Fe octahedra, corners with two equivalent O(3)Li6 octahedra,  an edgeedge with one O(3)Li6 octahedra, edges with two equivalent O(2)Li3Fe3 octahedra, edges with two equivalent O(5)Li5Fe octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(1)Li3Fe3 octahedra. The corner-sharing octahedral tilt angles range from 0-15°. In the third O site, O(3) is bonded to one Li(3), one Li(4), two equivalent Li(1), and two equivalent Li(2) atoms to form OLi6 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(5)Li5Fe octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(2)Li3Fe3 octahedra,  an edgeedge with one O(2)Li3Fe3 octahedra, edges with two equivalent O(1)Li3Fe3 octahedra, edges with two equivalent O(3)Li6 octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(5)Li5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-13°. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Li(3), one Li(4), one Fe(1), and one Fe(2) atom to form OLi4Fe2 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(5)Li5Fe octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(4)Li4Fe2 octahedra, edges with three equivalent O(1)Li3Fe3 octahedra, edges with three equivalent O(2)Li3Fe3 octahedra, edges with three equivalent O(5)Li5Fe octahedra, and edges with three equivalent O(3)Li6 octahedra. The corner-sharing octahedral tilt angles range from 0-24°. In the fifth O site, O(5) is bonded to one Li(1), one Li(3), one Li(4), two equivalent Li(2), and one Fe(2) atom to form OLi5Fe octahedra that share  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(5)Li5Fe octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(1)Li3Fe3 octahedra,  an edgeedge with one O(5)Li5Fe octahedra, edges with two equivalent O(1)Li3Fe3 octahedra, edges with two equivalent O(2)Li3Fe3 octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(3)Li6 octahedra. The corner-sharing octahedral tilt angles range from 0-17°. is represented by the CIF file [CIF]
data_Li7Fe3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.079
_cell_length_b   5.099
_cell_length_c   7.911
_cell_angle_alpha   103.559
_cell_angle_beta   106.176
_cell_angle_gamma   101.532
_symmetry_Int_Tables_number   1
_cell_volume   183.417
_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  0.592  0.000  0.681  1.0
  Li  Li1  1  0.203  0.494  0.410  1.0
  Li  Li2  1  0.392  0.512  0.774  1.0
  Li  Li3  1  0.000  0.000  0.500  1.0
  Li  Li4  1  0.608  0.488  0.226  1.0
  Li  Li5  1  0.797  0.506  0.590  1.0
  Li  Li6  1  0.408  1.000  0.319  1.0
  Fe  Fe7  1  0.000  0.500  0.000  1.0
  Fe  Fe8  1  0.203  0.006  0.890  1.0
  Fe  Fe9  1  0.797  0.994  0.110  1.0
  O  O10  1  0.816  0.755  0.879  1.0
  O  O11  1  0.627  0.231  0.966  1.0
  O  O12  1  0.413  0.271  0.546  1.0
  O  O13  1  0.974  0.751  0.225  1.0
  O  O14  1  0.195  0.783  0.671  1.0
  O  O15  1  0.805  0.217  0.329  1.0
  O  O16  1  0.026  0.249  0.775  1.0
  O  O17  1  0.587  0.729  0.454  1.0
  O  O18  1  0.373  0.769  0.034  1.0
  O  O19  1  0.184  0.245  0.121  1.0
[/CIF]
.
The compound described by Li7Fe3O10 is Caswellsilverite-like structured and crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form distorted LiO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Li(2)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with three equivalent Li(2)O6 octahedra, and edges with three equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-16°. In the second Li site, Li(2) is bonded to one O(1), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form distorted LiO6 octahedra that share  a cornercorner with one Li(4)O6 octahedra, corners with two equivalent Li(1)O6 octahedra, corners with three equivalent Fe(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Fe(2)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, and edges with three equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-16°. In the third Li site, Li(3) is bonded in a 6-coordinate geometry to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms. In the fourth Li site, Li(4) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form LiO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with two 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 Li(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 2-10°. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(4)O6 octahedra, corners with two equivalent Fe(2)O6 octahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Li(2)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 10-14°. In the second Fe site, Fe(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with three equivalent Li(2)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra, edges with two equivalent Fe(1)O6 octahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with three equivalent Li(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-14°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Li(3), one Fe(1), and two equivalent Fe(2) atoms to form distorted OLi3Fe3 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(5)Li5Fe octahedra,  an edgeedge with one O(1)Li3Fe3 octahedra, edges with two equivalent O(5)Li5Fe octahedra, edges with two equivalent O(3)Li6 octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(2)Li3Fe3 octahedra. The corner-sharing octahedral tilt angles range from 0-24°. In the second O site, O(2) is bonded to one Li(1), two equivalent Li(3), one Fe(1), and two equivalent Fe(2) atoms to form distorted OLi3Fe3 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(5)Li5Fe octahedra, corners with two equivalent O(3)Li6 octahedra,  an edgeedge with one O(3)Li6 octahedra, edges with two equivalent O(2)Li3Fe3 octahedra, edges with two equivalent O(5)Li5Fe octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(1)Li3Fe3 octahedra. The corner-sharing octahedral tilt angles range from 0-15°. In the third O site, O(3) is bonded to one Li(3), one Li(4), two equivalent Li(1), and two equivalent Li(2) atoms to form OLi6 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(5)Li5Fe octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(2)Li3Fe3 octahedra,  an edgeedge with one O(2)Li3Fe3 octahedra, edges with two equivalent O(1)Li3Fe3 octahedra, edges with two equivalent O(3)Li6 octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(5)Li5Fe octahedra. The corner-sharing octahedral tilt angles range from 0-13°. In the fourth O site, O(4) is bonded to one Li(1), one Li(2), one Li(3), one Li(4), one Fe(1), and one Fe(2) atom to form OLi4Fe2 octahedra that share  a cornercorner with one O(1)Li3Fe3 octahedra,  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(5)Li5Fe octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(4)Li4Fe2 octahedra, edges with three equivalent O(1)Li3Fe3 octahedra, edges with three equivalent O(2)Li3Fe3 octahedra, edges with three equivalent O(5)Li5Fe octahedra, and edges with three equivalent O(3)Li6 octahedra. The corner-sharing octahedral tilt angles range from 0-24°. In the fifth O site, O(5) is bonded to one Li(1), one Li(3), one Li(4), two equivalent Li(2), and one Fe(2) atom to form OLi5Fe octahedra that share  a cornercorner with one O(2)Li3Fe3 octahedra,  a cornercorner with one O(4)Li4Fe2 octahedra,  a cornercorner with one O(5)Li5Fe octahedra,  a cornercorner with one O(3)Li6 octahedra, corners with two equivalent O(1)Li3Fe3 octahedra,  an edgeedge with one O(5)Li5Fe octahedra, edges with two equivalent O(1)Li3Fe3 octahedra, edges with two equivalent O(2)Li3Fe3 octahedra, edges with three equivalent O(4)Li4Fe2 octahedra, and edges with four equivalent O(3)Li6 octahedra. The corner-sharing octahedral tilt angles range from 0-17°. is represented by the CIF file [CIF]
data_Li7Fe3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.079
_cell_length_b   5.099
_cell_length_c   7.911
_cell_angle_alpha   103.559
_cell_angle_beta   106.176
_cell_angle_gamma   101.532
_symmetry_Int_Tables_number   1
_cell_volume   183.417
_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  0.592  0.000  0.681  1.0
  Li  Li1  1  0.203  0.494  0.410  1.0
  Li  Li2  1  0.392  0.512  0.774  1.0
  Li  Li3  1  0.000  0.000  0.500  1.0
  Li  Li4  1  0.608  0.488  0.226  1.0
  Li  Li5  1  0.797  0.506  0.590  1.0
  Li  Li6  1  0.408  1.000  0.319  1.0
  Fe  Fe7  1  0.000  0.500  0.000  1.0
  Fe  Fe8  1  0.203  0.006  0.890  1.0
  Fe  Fe9  1  0.797  0.994  0.110  1.0
  O  O10  1  0.816  0.755  0.879  1.0
  O  O11  1  0.627  0.231  0.966  1.0
  O  O12  1  0.413  0.271  0.546  1.0
  O  O13  1  0.974  0.751  0.225  1.0
  O  O14  1  0.195  0.783  0.671  1.0
  O  O15  1  0.805  0.217  0.329  1.0
  O  O16  1  0.026  0.249  0.775  1.0
  O  O17  1  0.587  0.729  0.454  1.0
  O  O18  1  0.373  0.769  0.034  1.0
  O  O19  1  0.184  0.245  0.121  1.0
[/CIF]
.