The structure described by Li10Cr(SiO5)2 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are twenty inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(18), one O(19), and one O(20) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and edges with two equivalent Li(20)O4 tetrahedra. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(19), one O(2), one O(3), and one O(4) atom. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(20), one O(3), and one O(5) atom. In the fourth Li site, Li(4) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(8) atom. In the fifth Li site, Li(5) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(7)O5 square pyramids,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(8)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(7)O5 square pyramids,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(10)O4 tetrahedra,  an edgeedge with one Li(8)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(4), one O(7), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(5)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(5), one O(6), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(6)O4 tetrahedra. In the tenth Li site, Li(10) is bonded to one O(11), one O(6), one O(7), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(8)O4 tetrahedra, and  an edgeedge with one Li(9)O4 tetrahedra. In the eleventh Li site, Li(11) is bonded to one O(10), one O(12), one O(13), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(12)O4 tetrahedra, and  an edgeedge with one Li(13)O4 tetrahedra. In the twelfth Li site, Li(12) is bonded to one O(10), one O(11), one O(13), and one O(15) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(11)O4 tetrahedra, and  an edgeedge with one Li(16)O4 tetrahedra. In the thirteenth Li site, Li(13) is bonded to one O(10), one O(11), one O(12), and one O(14) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(11)O4 tetrahedra, and  an edgeedge with one Li(15)O4 tetrahedra. In the fourteenth Li site, Li(14) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(13), one O(14), and one O(15) atom. In the fifteenth Li site, Li(15) is bonded to one O(12), one O(14), one O(16), and one O(17) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra,  an edgeedge with one Li(13)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. In the sixteenth Li site, Li(16) is bonded to one O(13), one O(15), one O(16), and one O(17) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(15)O4 tetrahedra,  an edgeedge with one Li(12)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. In the seventeenth Li site, Li(17) is bonded in a 4-coordinate geometry to one O(11), one O(14), one O(15), and one O(17) atom. In the eighteenth Li site, Li(18) is bonded in a 4-coordinate geometry to one O(15), one O(16), one O(17), one O(18), and one O(20) atom. In the nineteenth Li site, Li(19) is bonded in a 4-coordinate geometry to one O(14), one O(16), one O(17), one O(18), and one O(19) atom. In the twentieth Li site, Li(20) is bonded to one O(1), one O(18), one O(19), and one O(20) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and edges with two equivalent Li(1)O4 trigonal pyramids. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a trigonal non-coplanar geometry to one O(19), one O(2), and one O(20) atom. In the second Cr site, Cr(2) is bonded in a 3-coordinate geometry to one O(17), one O(19), and one O(20) atom. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(20)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(5)O4 tetrahedra, and  an edgeedge with one Li(6)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(10), one O(6), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Li(7)O5 square pyramids,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Li(9)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(11), one O(12), one O(13), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, and corners with two equivalent Li(13)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(14), one O(15), one O(16), and one O(18) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(20)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one Li(15)O4 tetrahedra, and  an edgeedge with one Li(16)O4 tetrahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Li(20), one Li(3), and one Si(1) atom to form OLi4Si trigonal bipyramids that share corners with two equivalent O(2)Li5Cr octahedra,  a cornercorner with one O(19)Li4Cr2 pentagonal pyramid,  a cornercorner with one O(20)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(18)Li4Si trigonal bipyramid. The corner-sharing octahedral tilt angles range from 27-28°. In the second O site, O(2) is bonded to one Li(2), one Li(3), one Li(4), one Li(5), one Li(6), and one Cr(1) atom to form OLi5Cr octahedra that share corners with two equivalent O(1)Li4Si trigonal bipyramids,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid. In the third O site, O(3) is bonded in a distorted pentagonal planar geometry to one Li(2), one Li(3), one Li(5), one Li(6), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Li(2), one Li(4), one Li(5), one Li(7), one Li(8), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Li(3), one Li(4), one Li(6), one Li(7), one Li(9), and one Si(1) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Li(10), one Li(6), one Li(7), one Li(9), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Li(10), one Li(5), one Li(7), one Li(8), and one Si(2) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Li(11), one Li(4), one Li(8), one Li(9), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Li(10), one Li(7), one Li(8), one Li(9), and one Si(3) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(11), one Li(12), one Li(13), one Li(14), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Li(10), one Li(12), one Li(13), one Li(17), and one Si(3) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Li(11), one Li(13), one Li(14), one Li(15), and one Si(3) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(11), one Li(12), one Li(14), one Li(16), and one Si(3) atom. In the fourteenth O site, O(14) is bonded in a 6-coordinate geometry to one Li(13), one Li(14), one Li(15), one Li(17), one Li(19), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Li(12), one Li(14), one Li(16), one Li(17), one Li(18), and one Si(4) atom. In the sixteenth O site, O(16) is bonded in a distorted pentagonal planar geometry to one Li(15), one Li(16), one Li(18), one Li(19), and one Si(4) atom. In the seventeenth O site, O(17) is bonded to one Li(15), one Li(16), one Li(17), one Li(18), one Li(19), and one Cr(2) atom to form OLi5Cr octahedra that share corners with two equivalent O(18)Li4Si trigonal bipyramids,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid. In the eighteenth O site, O(18) is bonded to one Li(1), one Li(18), one Li(19), one Li(20), and one Si(4) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(17)Li5Cr octahedra,  a cornercorner with one O(19)Li4Cr2 pentagonal pyramid,  a cornercorner with one O(20)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(1)Li4Si trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-29°. In the nineteenth O site, O(19) is bonded to one Li(1), one Li(19), one Li(2), one Li(20), one Cr(1), and one Cr(2) atom to form distorted OLi4Cr2 pentagonal pyramids that share  a cornercorner with one O(1)Li4Si trigonal bipyramid,  a cornercorner with one O(18)Li4Si trigonal bipyramid,  an edgeedge with one O(17)Li5Cr octahedra,  an edgeedge with one O(2)Li5Cr octahedra, edges with two equivalent O(20)Li4Cr2 pentagonal pyramids,  an edgeedge with one O(1)Li4Si trigonal bipyramid, and  an edgeedge with one O(18)Li4Si trigonal bipyramid. In the twentieth O site, O(20) is bonded to one Li(1), one Li(18), one Li(20), one Li(3), one Cr(1), and one Cr(2) atom to form distorted OLi4Cr2 pentagonal pyramids that share  a cornercorner with one O(1)Li4Si trigonal bipyramid,  a cornercorner with one O(18)Li4Si trigonal bipyramid,  an edgeedge with one O(17)Li5Cr octahedra,  an edgeedge with one O(2)Li5Cr octahedra, edges with two equivalent O(19)Li4Cr2 pentagonal pyramids,  an edgeedge with one O(1)Li4Si trigonal bipyramid, and  an edgeedge with one O(18)Li4Si trigonal bipyramid. is represented by the CIF file [CIF]
data_Li10Cr(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.087
_cell_length_b   15.327
_cell_length_c   5.153
_cell_angle_alpha   80.023
_cell_angle_beta   90.154
_cell_angle_gamma   78.677
_symmetry_Int_Tables_number   1
_cell_volume   463.930
_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  0.511  0.984  0.756  1.0
  Li  Li1  1  0.358  0.867  0.236  1.0
  Li  Li2  1  0.779  0.865  0.236  1.0
  Li  Li3  1  0.129  0.736  0.481  1.0
  Li  Li4  1  0.345  0.737  0.026  1.0
  Li  Li5  1  0.914  0.736  0.024  1.0
  Li  Li6  1  0.675  0.649  0.420  1.0
  Li  Li7  1  0.438  0.611  0.787  1.0
  Li  Li8  1  0.953  0.610  0.787  1.0
  Li  Li9  1  0.731  0.540  0.134  1.0
  Li  Li10  1  0.269  0.460  0.864  1.0
  Li  Li11  1  0.563  0.390  0.210  1.0
  Li  Li12  1  0.047  0.389  0.212  1.0
  Li  Li13  1  0.330  0.351  0.580  1.0
  Li  Li14  1  0.081  0.263  0.971  1.0
  Li  Li15  1  0.649  0.262  0.976  1.0
  Li  Li16  1  0.865  0.262  0.520  1.0
  Li  Li17  1  0.643  0.132  0.768  1.0
  Li  Li18  1  0.222  0.130  0.771  1.0
  Li  Li19  1  0.494  0.017  0.240  1.0
  Cr  Cr20  1  0.041  0.930  0.880  1.0
  Cr  Cr21  1  0.960  0.077  0.143  1.0
  Si  Si22  1  0.600  0.800  0.693  1.0
  Si  Si23  1  0.219  0.561  0.308  1.0
  Si  Si24  1  0.780  0.438  0.690  1.0
  Si  Si25  1  0.396  0.200  0.308  1.0
  O  O26  1  0.553  0.900  0.498  1.0
  O  O27  1  0.089  0.814  0.133  1.0
  O  O28  1  0.595  0.810  0.009  1.0
  O  O29  1  0.407  0.743  0.635  1.0
  O  O30  1  0.846  0.741  0.636  1.0
  O  O31  1  0.967  0.612  0.169  1.0
  O  O32  1  0.420  0.612  0.169  1.0
  O  O33  1  0.214  0.572  0.620  1.0
  O  O34  1  0.727  0.545  0.736  1.0
  O  O35  1  0.272  0.455  0.263  1.0
  O  O36  1  0.785  0.428  0.378  1.0
  O  O37  1  0.032  0.387  0.830  1.0
  O  O38  1  0.580  0.387  0.829  1.0
  O  O39  1  0.146  0.256  0.362  1.0
  O  O40  1  0.583  0.259  0.366  1.0
  O  O41  1  0.401  0.191  0.992  1.0
  O  O42  1  0.902  0.184  0.868  1.0
  O  O43  1  0.447  0.100  0.502  1.0
  O  O44  1  0.252  0.002  0.995  1.0
  O  O45  1  0.764  0.003  0.999  1.0
[/CIF]
.
The structure described by Li10Cr(SiO5)2 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are twenty inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(18), one O(19), and one O(20) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and edges with two equivalent Li(20)O4 tetrahedra. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(19), one O(2), one O(3), and one O(4) atom. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(20), one O(3), and one O(5) atom. In the fourth Li site, Li(4) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(5), and one O(8) atom. In the fifth Li site, Li(5) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(7)O5 square pyramids,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra,  an edgeedge with one Li(8)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(2), one O(3), one O(5), and one O(6) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(7)O5 square pyramids,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(10)O4 tetrahedra,  an edgeedge with one Li(8)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(4), one O(7), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(5)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(5), one O(6), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(6)O4 tetrahedra. In the tenth Li site, Li(10) is bonded to one O(11), one O(6), one O(7), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(8)O4 tetrahedra, and  an edgeedge with one Li(9)O4 tetrahedra. In the eleventh Li site, Li(11) is bonded to one O(10), one O(12), one O(13), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(12)O4 tetrahedra, and  an edgeedge with one Li(13)O4 tetrahedra. In the twelfth Li site, Li(12) is bonded to one O(10), one O(11), one O(13), and one O(15) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(11)O4 tetrahedra, and  an edgeedge with one Li(16)O4 tetrahedra. In the thirteenth Li site, Li(13) is bonded to one O(10), one O(11), one O(12), and one O(14) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Li(11)O4 tetrahedra, and  an edgeedge with one Li(15)O4 tetrahedra. In the fourteenth Li site, Li(14) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(13), one O(14), and one O(15) atom. In the fifteenth Li site, Li(15) is bonded to one O(12), one O(14), one O(16), and one O(17) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra,  an edgeedge with one Li(13)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. In the sixteenth Li site, Li(16) is bonded to one O(13), one O(15), one O(16), and one O(17) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(11)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(15)O4 tetrahedra,  an edgeedge with one Li(12)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. In the seventeenth Li site, Li(17) is bonded in a 4-coordinate geometry to one O(11), one O(14), one O(15), and one O(17) atom. In the eighteenth Li site, Li(18) is bonded in a 4-coordinate geometry to one O(15), one O(16), one O(17), one O(18), and one O(20) atom. In the nineteenth Li site, Li(19) is bonded in a 4-coordinate geometry to one O(14), one O(16), one O(17), one O(18), and one O(19) atom. In the twentieth Li site, Li(20) is bonded to one O(1), one O(18), one O(19), and one O(20) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and edges with two equivalent Li(1)O4 trigonal pyramids. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a trigonal non-coplanar geometry to one O(19), one O(2), and one O(20) atom. In the second Cr site, Cr(2) is bonded in a 3-coordinate geometry to one O(17), one O(19), and one O(20) atom. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(20)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one Li(7)O5 square pyramid,  an edgeedge with one Li(5)O4 tetrahedra, and  an edgeedge with one Li(6)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(10), one O(6), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Li(7)O5 square pyramids,  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Li(9)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(11), one O(12), one O(13), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(7)O5 square pyramid,  a cornercorner with one Li(15)O4 tetrahedra,  a cornercorner with one Li(16)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(11)O4 tetrahedra, corners with two equivalent Li(12)O4 tetrahedra, and corners with two equivalent Li(13)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(14), one O(15), one O(16), and one O(18) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(12)O4 tetrahedra,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(20)O4 tetrahedra,  a cornercorner with one Li(1)O4 trigonal pyramid,  an edgeedge with one Li(15)O4 tetrahedra, and  an edgeedge with one Li(16)O4 tetrahedra. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Li(20), one Li(3), and one Si(1) atom to form OLi4Si trigonal bipyramids that share corners with two equivalent O(2)Li5Cr octahedra,  a cornercorner with one O(19)Li4Cr2 pentagonal pyramid,  a cornercorner with one O(20)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(18)Li4Si trigonal bipyramid. The corner-sharing octahedral tilt angles range from 27-28°. In the second O site, O(2) is bonded to one Li(2), one Li(3), one Li(4), one Li(5), one Li(6), and one Cr(1) atom to form OLi5Cr octahedra that share corners with two equivalent O(1)Li4Si trigonal bipyramids,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid. In the third O site, O(3) is bonded in a distorted pentagonal planar geometry to one Li(2), one Li(3), one Li(5), one Li(6), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Li(2), one Li(4), one Li(5), one Li(7), one Li(8), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Li(3), one Li(4), one Li(6), one Li(7), one Li(9), and one Si(1) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Li(10), one Li(6), one Li(7), one Li(9), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Li(10), one Li(5), one Li(7), one Li(8), and one Si(2) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Li(11), one Li(4), one Li(8), one Li(9), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Li(10), one Li(7), one Li(8), one Li(9), and one Si(3) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(11), one Li(12), one Li(13), one Li(14), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Li(10), one Li(12), one Li(13), one Li(17), and one Si(3) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Li(11), one Li(13), one Li(14), one Li(15), and one Si(3) atom. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(11), one Li(12), one Li(14), one Li(16), and one Si(3) atom. In the fourteenth O site, O(14) is bonded in a 6-coordinate geometry to one Li(13), one Li(14), one Li(15), one Li(17), one Li(19), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Li(12), one Li(14), one Li(16), one Li(17), one Li(18), and one Si(4) atom. In the sixteenth O site, O(16) is bonded in a distorted pentagonal planar geometry to one Li(15), one Li(16), one Li(18), one Li(19), and one Si(4) atom. In the seventeenth O site, O(17) is bonded to one Li(15), one Li(16), one Li(17), one Li(18), one Li(19), and one Cr(2) atom to form OLi5Cr octahedra that share corners with two equivalent O(18)Li4Si trigonal bipyramids,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid. In the eighteenth O site, O(18) is bonded to one Li(1), one Li(18), one Li(19), one Li(20), and one Si(4) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(17)Li5Cr octahedra,  a cornercorner with one O(19)Li4Cr2 pentagonal pyramid,  a cornercorner with one O(20)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(19)Li4Cr2 pentagonal pyramid,  an edgeedge with one O(20)Li4Cr2 pentagonal pyramid, and  an edgeedge with one O(1)Li4Si trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-29°. In the nineteenth O site, O(19) is bonded to one Li(1), one Li(19), one Li(2), one Li(20), one Cr(1), and one Cr(2) atom to form distorted OLi4Cr2 pentagonal pyramids that share  a cornercorner with one O(1)Li4Si trigonal bipyramid,  a cornercorner with one O(18)Li4Si trigonal bipyramid,  an edgeedge with one O(17)Li5Cr octahedra,  an edgeedge with one O(2)Li5Cr octahedra, edges with two equivalent O(20)Li4Cr2 pentagonal pyramids,  an edgeedge with one O(1)Li4Si trigonal bipyramid, and  an edgeedge with one O(18)Li4Si trigonal bipyramid. In the twentieth O site, O(20) is bonded to one Li(1), one Li(18), one Li(20), one Li(3), one Cr(1), and one Cr(2) atom to form distorted OLi4Cr2 pentagonal pyramids that share  a cornercorner with one O(1)Li4Si trigonal bipyramid,  a cornercorner with one O(18)Li4Si trigonal bipyramid,  an edgeedge with one O(17)Li5Cr octahedra,  an edgeedge with one O(2)Li5Cr octahedra, edges with two equivalent O(19)Li4Cr2 pentagonal pyramids,  an edgeedge with one O(1)Li4Si trigonal bipyramid, and  an edgeedge with one O(18)Li4Si trigonal bipyramid. is represented by the CIF file [CIF]
data_Li10Cr(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.087
_cell_length_b   15.327
_cell_length_c   5.153
_cell_angle_alpha   80.023
_cell_angle_beta   90.154
_cell_angle_gamma   78.677
_symmetry_Int_Tables_number   1
_cell_volume   463.930
_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  0.511  0.984  0.756  1.0
  Li  Li1  1  0.358  0.867  0.236  1.0
  Li  Li2  1  0.779  0.865  0.236  1.0
  Li  Li3  1  0.129  0.736  0.481  1.0
  Li  Li4  1  0.345  0.737  0.026  1.0
  Li  Li5  1  0.914  0.736  0.024  1.0
  Li  Li6  1  0.675  0.649  0.420  1.0
  Li  Li7  1  0.438  0.611  0.787  1.0
  Li  Li8  1  0.953  0.610  0.787  1.0
  Li  Li9  1  0.731  0.540  0.134  1.0
  Li  Li10  1  0.269  0.460  0.864  1.0
  Li  Li11  1  0.563  0.390  0.210  1.0
  Li  Li12  1  0.047  0.389  0.212  1.0
  Li  Li13  1  0.330  0.351  0.580  1.0
  Li  Li14  1  0.081  0.263  0.971  1.0
  Li  Li15  1  0.649  0.262  0.976  1.0
  Li  Li16  1  0.865  0.262  0.520  1.0
  Li  Li17  1  0.643  0.132  0.768  1.0
  Li  Li18  1  0.222  0.130  0.771  1.0
  Li  Li19  1  0.494  0.017  0.240  1.0
  Cr  Cr20  1  0.041  0.930  0.880  1.0
  Cr  Cr21  1  0.960  0.077  0.143  1.0
  Si  Si22  1  0.600  0.800  0.693  1.0
  Si  Si23  1  0.219  0.561  0.308  1.0
  Si  Si24  1  0.780  0.438  0.690  1.0
  Si  Si25  1  0.396  0.200  0.308  1.0
  O  O26  1  0.553  0.900  0.498  1.0
  O  O27  1  0.089  0.814  0.133  1.0
  O  O28  1  0.595  0.810  0.009  1.0
  O  O29  1  0.407  0.743  0.635  1.0
  O  O30  1  0.846  0.741  0.636  1.0
  O  O31  1  0.967  0.612  0.169  1.0
  O  O32  1  0.420  0.612  0.169  1.0
  O  O33  1  0.214  0.572  0.620  1.0
  O  O34  1  0.727  0.545  0.736  1.0
  O  O35  1  0.272  0.455  0.263  1.0
  O  O36  1  0.785  0.428  0.378  1.0
  O  O37  1  0.032  0.387  0.830  1.0
  O  O38  1  0.580  0.387  0.829  1.0
  O  O39  1  0.146  0.256  0.362  1.0
  O  O40  1  0.583  0.259  0.366  1.0
  O  O41  1  0.401  0.191  0.992  1.0
  O  O42  1  0.902  0.184  0.868  1.0
  O  O43  1  0.447  0.100  0.502  1.0
  O  O44  1  0.252  0.002  0.995  1.0
  O  O45  1  0.764  0.003  0.999  1.0
[/CIF]
.