The material structure described by Li2Cr(SiO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(2), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(10), one O(11), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(1), one O(11), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(11), one O(12), and one O(2) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. There are four 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  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(4), one Cr(2), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Cr(2), and one Si(1) atom to form corner-sharing OLi2CrSi tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(1), one Li(2), one Cr(1), and one Si(2) atom to form corner-sharing OLi2CrSi tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(3), one Cr(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Cr(1), and one Si(3) atom. In the eighth O site, O(8) is bonded to one Li(3), one Li(4), one Cr(1), and one Si(3) atom to form corner-sharing OLi2CrSi tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Li(4), one Si(3), and one Si(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Li(3), one Si(3), and one Si(4) atom. In the eleventh O site, O(11) is bonded to one Li(3), one Li(4), one Cr(2), and one Si(4) atom to form corner-sharing OLi2CrSi tetrahedra. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(1), one Cr(2), and one Si(4) atom. is represented by the CIF file [CIF]
data_Li2Cr(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.197
_cell_length_b   10.486
_cell_length_c   5.196
_cell_angle_alpha   105.715
_cell_angle_beta   95.338
_cell_angle_gamma   74.257
_symmetry_Int_Tables_number   1
_cell_volume   262.281
_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  0.509  0.839  0.924  1.0
  Li  Li1  1  0.097  0.664  0.837  1.0
  Li  Li2  1  0.836  0.339  0.098  1.0
  Li  Li3  1  0.924  0.164  0.511  1.0
  Cr  Cr4  1  0.679  0.501  0.679  1.0
  Cr  Cr5  1  0.928  0.002  0.929  1.0
  Si  Si6  1  0.193  0.836  0.384  1.0
  Si  Si7  1  0.778  0.667  0.299  1.0
  Si  Si8  1  0.299  0.336  0.780  1.0
  Si  Si9  1  0.383  0.167  0.195  1.0
  O  O10  1  0.096  0.987  0.585  1.0
  O  O11  1  0.174  0.831  0.067  1.0
  O  O12  1  0.024  0.735  0.457  1.0
  O  O13  1  0.508  0.768  0.474  1.0
  O  O14  1  0.754  0.672  0.988  1.0
  O  O15  1  0.832  0.516  0.350  1.0
  O  O16  1  0.349  0.487  0.831  1.0
  O  O17  1  0.988  0.330  0.756  1.0
  O  O18  1  0.474  0.234  0.510  1.0
  O  O19  1  0.456  0.268  0.027  1.0
  O  O20  1  0.066  0.172  0.177  1.0
  O  O21  1  0.584  0.016  0.096  1.0
[/CIF]
.
The material structure described by Li2Cr(SiO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(2), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(10), one O(11), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(1), one O(11), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(11), one O(12), and one O(2) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. There are four 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  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(4), one Cr(2), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Cr(2), and one Si(1) atom to form corner-sharing OLi2CrSi tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(1), one Li(2), one Cr(1), and one Si(2) atom to form corner-sharing OLi2CrSi tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(3), one Cr(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Cr(1), and one Si(3) atom. In the eighth O site, O(8) is bonded to one Li(3), one Li(4), one Cr(1), and one Si(3) atom to form corner-sharing OLi2CrSi tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Li(4), one Si(3), and one Si(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Li(3), one Si(3), and one Si(4) atom. In the eleventh O site, O(11) is bonded to one Li(3), one Li(4), one Cr(2), and one Si(4) atom to form corner-sharing OLi2CrSi tetrahedra. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(1), one Cr(2), and one Si(4) atom. is represented by the CIF file [CIF]
data_Li2Cr(SiO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.197
_cell_length_b   10.486
_cell_length_c   5.196
_cell_angle_alpha   105.715
_cell_angle_beta   95.338
_cell_angle_gamma   74.257
_symmetry_Int_Tables_number   1
_cell_volume   262.281
_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  0.509  0.839  0.924  1.0
  Li  Li1  1  0.097  0.664  0.837  1.0
  Li  Li2  1  0.836  0.339  0.098  1.0
  Li  Li3  1  0.924  0.164  0.511  1.0
  Cr  Cr4  1  0.679  0.501  0.679  1.0
  Cr  Cr5  1  0.928  0.002  0.929  1.0
  Si  Si6  1  0.193  0.836  0.384  1.0
  Si  Si7  1  0.778  0.667  0.299  1.0
  Si  Si8  1  0.299  0.336  0.780  1.0
  Si  Si9  1  0.383  0.167  0.195  1.0
  O  O10  1  0.096  0.987  0.585  1.0
  O  O11  1  0.174  0.831  0.067  1.0
  O  O12  1  0.024  0.735  0.457  1.0
  O  O13  1  0.508  0.768  0.474  1.0
  O  O14  1  0.754  0.672  0.988  1.0
  O  O15  1  0.832  0.516  0.350  1.0
  O  O16  1  0.349  0.487  0.831  1.0
  O  O17  1  0.988  0.330  0.756  1.0
  O  O18  1  0.474  0.234  0.510  1.0
  O  O19  1  0.456  0.268  0.027  1.0
  O  O20  1  0.066  0.172  0.177  1.0
  O  O21  1  0.584  0.016  0.096  1.0
[/CIF]
.