The crystal structure described by Li2Fe2Si3O10 crystallizes in the orthorhombic Fdd2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(5) atom. Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Fe(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Fe(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_Li2Fe2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.539
_cell_length_b   9.818
_cell_length_c   9.183
_cell_angle_alpha   82.511
_cell_angle_beta   50.925
_cell_angle_gamma   46.564
_symmetry_Int_Tables_number   1
_cell_volume   537.355
_cell_formula_units_Z   2
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  0.321  0.080  0.504  1.0
  Li  Li1  1  0.170  0.929  0.155  1.0
  Li  Li2  1  0.746  0.155  0.929  1.0
  Li  Li3  1  0.095  0.504  0.080  1.0
  Fe  Fe4  1  0.484  0.973  0.787  1.0
  Fe  Fe5  1  0.277  0.766  0.493  1.0
  Fe  Fe6  1  0.463  0.493  0.766  1.0
  Fe  Fe7  1  0.757  0.787  0.973  1.0
  Si  Si8  1  0.281  0.012  0.263  1.0
  Si  Si9  1  0.238  0.969  0.806  1.0
  Si  Si10  1  0.750  0.250  0.250  1.0
  Si  Si11  1  0.987  0.806  0.969  1.0
  Si  Si12  1  0.444  0.263  0.012  1.0
  Si  Si13  1  0.000  0.500  0.500  1.0
  O  O14  1  0.780  0.685  0.563  1.0
  O  O15  1  0.332  0.054  0.728  1.0
  O  O16  1  0.503  0.871  0.189  1.0
  O  O17  1  0.094  0.267  0.457  1.0
  O  O18  1  0.305  0.011  0.067  1.0
  O  O19  1  0.239  0.945  0.633  1.0
  O  O20  1  0.983  0.156  0.067  1.0
  O  O21  1  0.379  0.747  0.813  1.0
  O  O22  1  0.196  0.918  0.364  1.0
  O  O23  1  0.565  0.470  0.278  1.0
  O  O24  1  0.687  0.278  0.470  1.0
  O  O25  1  0.522  0.364  0.918  1.0
  O  O26  1  0.061  0.813  0.747  1.0
  O  O27  1  0.793  0.067  0.156  1.0
  O  O28  1  0.183  0.633  0.945  1.0
  O  O29  1  0.617  0.067  0.011  1.0
  O  O30  1  0.183  0.457  0.267  1.0
  O  O31  1  0.437  0.189  0.871  1.0
  O  O32  1  0.886  0.728  0.054  1.0
  O  O33  1  0.972  0.563  0.685  1.0
[/CIF]
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The crystal structure described by Li2Fe2Si3O10 crystallizes in the orthorhombic Fdd2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), one O(4), and one O(5) atom. Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form FeO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra and corners with three equivalent Fe(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra and corners with two equivalent Si(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Si(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Li(1), one Fe(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Fe(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_Li2Fe2Si3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.539
_cell_length_b   9.818
_cell_length_c   9.183
_cell_angle_alpha   82.511
_cell_angle_beta   50.925
_cell_angle_gamma   46.564
_symmetry_Int_Tables_number   1
_cell_volume   537.355
_cell_formula_units_Z   2
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  0.321  0.080  0.504  1.0
  Li  Li1  1  0.170  0.929  0.155  1.0
  Li  Li2  1  0.746  0.155  0.929  1.0
  Li  Li3  1  0.095  0.504  0.080  1.0
  Fe  Fe4  1  0.484  0.973  0.787  1.0
  Fe  Fe5  1  0.277  0.766  0.493  1.0
  Fe  Fe6  1  0.463  0.493  0.766  1.0
  Fe  Fe7  1  0.757  0.787  0.973  1.0
  Si  Si8  1  0.281  0.012  0.263  1.0
  Si  Si9  1  0.238  0.969  0.806  1.0
  Si  Si10  1  0.750  0.250  0.250  1.0
  Si  Si11  1  0.987  0.806  0.969  1.0
  Si  Si12  1  0.444  0.263  0.012  1.0
  Si  Si13  1  0.000  0.500  0.500  1.0
  O  O14  1  0.780  0.685  0.563  1.0
  O  O15  1  0.332  0.054  0.728  1.0
  O  O16  1  0.503  0.871  0.189  1.0
  O  O17  1  0.094  0.267  0.457  1.0
  O  O18  1  0.305  0.011  0.067  1.0
  O  O19  1  0.239  0.945  0.633  1.0
  O  O20  1  0.983  0.156  0.067  1.0
  O  O21  1  0.379  0.747  0.813  1.0
  O  O22  1  0.196  0.918  0.364  1.0
  O  O23  1  0.565  0.470  0.278  1.0
  O  O24  1  0.687  0.278  0.470  1.0
  O  O25  1  0.522  0.364  0.918  1.0
  O  O26  1  0.061  0.813  0.747  1.0
  O  O27  1  0.793  0.067  0.156  1.0
  O  O28  1  0.183  0.633  0.945  1.0
  O  O29  1  0.617  0.067  0.011  1.0
  O  O30  1  0.183  0.457  0.267  1.0
  O  O31  1  0.437  0.189  0.871  1.0
  O  O32  1  0.886  0.728  0.054  1.0
  O  O33  1  0.972  0.563  0.685  1.0
[/CIF]
.