The material structure described by Li2CrSi4O11 crystallizes in the monoclinic C2/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a distorted trigonal planar geometry to one O(6) and two equivalent O(5) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(5) atoms. Cr(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 21-53°. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a trigonal non-coplanar geometry to one Li(2), one Cr(1), and one Si(1) atom. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Cr(1), and one Si(2) atom. In the fourth O site, O(6) is bonded in a trigonal planar geometry to one Li(1) and two equivalent Si(2) atoms. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the sixth O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Si(1) atom. is represented by the CIF file [CIF]
data_Li2CrSi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.186
_cell_length_b   7.186
_cell_length_c   8.213
_cell_angle_alpha   81.124
_cell_angle_beta   81.124
_cell_angle_gamma   83.377
_symmetry_Int_Tables_number   1
_cell_volume   412.217
_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  0.922  0.078  0.750  1.0
  Li  Li1  1  0.651  0.349  0.750  1.0
  Li  Li2  1  0.349  0.651  0.250  1.0
  Li  Li3  1  0.078  0.922  0.250  1.0
  Cr  Cr4  1  0.000  0.500  0.500  1.0
  Cr  Cr5  1  0.500  0.000  0.000  1.0
  Si  Si6  1  0.658  0.776  0.662  1.0
  Si  Si7  1  0.776  0.658  0.162  1.0
  Si  Si8  1  0.252  0.839  0.563  1.0
  Si  Si9  1  0.161  0.748  0.937  1.0
  Si  Si10  1  0.839  0.252  0.063  1.0
  Si  Si11  1  0.748  0.161  0.437  1.0
  Si  Si12  1  0.224  0.342  0.838  1.0
  Si  Si13  1  0.342  0.224  0.338  1.0
  O  O14  1  0.756  0.945  0.534  1.0
  O  O15  1  0.606  0.847  0.842  1.0
  O  O16  1  0.945  0.756  0.034  1.0
  O  O17  1  0.847  0.606  0.342  1.0
  O  O18  1  0.801  0.585  0.676  1.0
  O  O19  1  0.585  0.801  0.176  1.0
  O  O20  1  0.464  0.740  0.590  1.0
  O  O21  1  0.851  0.269  0.552  1.0
  O  O22  1  0.740  0.464  0.090  1.0
  O  O23  1  0.134  0.866  0.750  1.0
  O  O24  1  0.731  0.149  0.948  1.0
  O  O25  1  0.269  0.851  0.052  1.0
  O  O26  1  0.866  0.134  0.250  1.0
  O  O27  1  0.260  0.536  0.910  1.0
  O  O28  1  0.149  0.731  0.448  1.0
  O  O29  1  0.536  0.260  0.410  1.0
  O  O30  1  0.415  0.199  0.824  1.0
  O  O31  1  0.199  0.415  0.324  1.0
  O  O32  1  0.153  0.394  0.658  1.0
  O  O33  1  0.055  0.244  0.966  1.0
  O  O34  1  0.394  0.153  0.158  1.0
  O  O35  1  0.244  0.055  0.466  1.0
[/CIF]
.
The material structure described by Li2CrSi4O11 crystallizes in the monoclinic C2/c space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a distorted trigonal planar geometry to one O(6) and two equivalent O(5) atoms. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to two equivalent O(3) and two equivalent O(5) atoms. Cr(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with two equivalent Cr(1)O6 octahedra and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 21-53°. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a trigonal non-coplanar geometry to one Li(2), one Cr(1), and one Si(1) atom. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Cr(1), and one Si(2) atom. In the fourth O site, O(6) is bonded in a trigonal planar geometry to one Li(1) and two equivalent Si(2) atoms. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the sixth O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Si(1) atom. is represented by the CIF file [CIF]
data_Li2CrSi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.186
_cell_length_b   7.186
_cell_length_c   8.213
_cell_angle_alpha   81.124
_cell_angle_beta   81.124
_cell_angle_gamma   83.377
_symmetry_Int_Tables_number   1
_cell_volume   412.217
_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  0.922  0.078  0.750  1.0
  Li  Li1  1  0.651  0.349  0.750  1.0
  Li  Li2  1  0.349  0.651  0.250  1.0
  Li  Li3  1  0.078  0.922  0.250  1.0
  Cr  Cr4  1  0.000  0.500  0.500  1.0
  Cr  Cr5  1  0.500  0.000  0.000  1.0
  Si  Si6  1  0.658  0.776  0.662  1.0
  Si  Si7  1  0.776  0.658  0.162  1.0
  Si  Si8  1  0.252  0.839  0.563  1.0
  Si  Si9  1  0.161  0.748  0.937  1.0
  Si  Si10  1  0.839  0.252  0.063  1.0
  Si  Si11  1  0.748  0.161  0.437  1.0
  Si  Si12  1  0.224  0.342  0.838  1.0
  Si  Si13  1  0.342  0.224  0.338  1.0
  O  O14  1  0.756  0.945  0.534  1.0
  O  O15  1  0.606  0.847  0.842  1.0
  O  O16  1  0.945  0.756  0.034  1.0
  O  O17  1  0.847  0.606  0.342  1.0
  O  O18  1  0.801  0.585  0.676  1.0
  O  O19  1  0.585  0.801  0.176  1.0
  O  O20  1  0.464  0.740  0.590  1.0
  O  O21  1  0.851  0.269  0.552  1.0
  O  O22  1  0.740  0.464  0.090  1.0
  O  O23  1  0.134  0.866  0.750  1.0
  O  O24  1  0.731  0.149  0.948  1.0
  O  O25  1  0.269  0.851  0.052  1.0
  O  O26  1  0.866  0.134  0.250  1.0
  O  O27  1  0.260  0.536  0.910  1.0
  O  O28  1  0.149  0.731  0.448  1.0
  O  O29  1  0.536  0.260  0.410  1.0
  O  O30  1  0.415  0.199  0.824  1.0
  O  O31  1  0.199  0.415  0.324  1.0
  O  O32  1  0.153  0.394  0.658  1.0
  O  O33  1  0.055  0.244  0.966  1.0
  O  O34  1  0.394  0.153  0.158  1.0
  O  O35  1  0.244  0.055  0.466  1.0
[/CIF]
.