The structure described by Li2Co3(SiO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(11), one O(17), one O(18), and one O(3) atom. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(17), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  an edgeedge with one Li(3)O4 trigonal pyramid. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(16), and one O(21) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Co(9)O4 tetrahedra. In the fourth Li site, Li(4) is bonded in a distorted rectangular see-saw-like geometry to one O(11), one O(19), one O(3), and one O(5) atom. In the fifth Li site, Li(5) is bonded to one O(16), one O(21), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 80°. In the sixth Li site, Li(6) is bonded to one O(13), one O(19), one O(22), one O(24), one O(5), and one O(9) atom to form distorted LiO6 octahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(3)O4 tetrahedra, and  an edgeedge with one Co(6)O4 tetrahedra. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(15), one O(19), one O(24), and one O(5) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 80°. In the second Co site, Co(2) is bonded to one O(16), one O(2), one O(6), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. In the third Co site, Co(3) is bonded to one O(13), one O(14), one O(22), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra, corners with two equivalent Si(6)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 81°. In the fourth Co site, Co(4) is bonded to one O(12), one O(14), one O(23), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra, and corners with two equivalent Si(6)O4 tetrahedra. In the fifth Co site, Co(5) is bonded to one O(15), one O(17), one O(18), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the sixth Co site, Co(6) is bonded to one O(13), one O(18), one O(20), and one O(22) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. In the seventh Co site, Co(7) is bonded to one O(12), one O(20), one O(23), and one O(24) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 80°. In the eighth Co site, Co(8) is bonded to one O(11), one O(2), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the ninth Co site, Co(9) is bonded to one O(1), one O(10), one O(21), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(3)O4 trigonal pyramid, and  an edgeedge with one Li(3)O4 trigonal pyramid. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(18), one O(19), and one O(3) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, and corners with two equivalent Co(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the second Si site, Si(2) is bonded to one O(15), one O(20), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. In the third Si site, Si(3) is bonded to one O(12), one O(24), one O(6), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 56°. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(8)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. In the fifth Si site, Si(5) is bonded to one O(1), one O(16), one O(17), and one O(2) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. In the sixth Si site, Si(6) is bonded to one O(14), one O(21), one O(22), and one O(23) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 51°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(3), one Co(9), and one Si(5) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(8), and one Si(5) atom. In the third O site, O(3) is bonded to one Li(1), one Li(4), one Co(8), and one Si(1) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(18)LiCo2Si tetrahedra, and corners with two equivalent O(19)Li2CoSi trigonal pyramids. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(8), one Co(9), and one Si(4) atom. In the fifth O site, O(5) is bonded to one Li(4), one Li(6), one Co(1), and one Si(2) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(3)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra,  a cornercorner with one O(19)Li2CoSi trigonal pyramid, and  an edgeedge with one O(19)Li2CoSi trigonal pyramid. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(5), one Co(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(5), and one Si(2) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(2), one Co(4), and one Si(4) atom. In the ninth O site, O(9) is bonded to one Li(5), one Li(6), one Co(3), and one Si(3) atom to form OLi2CoSi tetrahedra that share  a cornercorner with one O(16)Li2CoSi tetrahedra,  a cornercorner with one O(21)Li2CoSi tetrahedra,  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra, and  a cornercorner with one O(19)Li2CoSi trigonal pyramid. In the tenth O site, O(10) is bonded to one Li(2), one Li(3), one Co(9), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(1), one Li(4), one Co(8), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(3) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(1) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Co(3), one Co(4), and one Si(6) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(5), and one Si(2) atom. In the sixteenth O site, O(16) is bonded to one Li(3), one Li(5), one Co(2), and one Si(5) atom to form distorted corner-sharing OLi2CoSi tetrahedra. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Co(5), and one Si(5) atom. In the eighteenth O site, O(18) is bonded to one Li(1), one Co(5), one Co(6), and one Si(1) atom to form distorted corner-sharing OLiCo2Si tetrahedra. In the nineteenth O site, O(19) is bonded to one Li(4), one Li(6), one Co(1), and one Si(1) atom to form distorted OLi2CoSi trigonal pyramids that share  a cornercorner with one O(5)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra,  a cornercorner with one O(18)LiCo2Si tetrahedra, corners with two equivalent O(3)Li2CoSi tetrahedra,  an edgeedge with one O(5)Li2CoSi tetrahedra, and  an edgeedge with one O(24)LiCo2Si tetrahedra. In the twentieth O site, O(20) is bonded in a trigonal planar geometry to one Co(6), one Co(7), and one Si(2) atom. In the twenty-first O site, O(21) is bonded to one Li(3), one Li(5), one Co(9), and one Si(6) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(6) atom. In the twenty-third O site, O(23) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(6) atom. In the twenty-fourth O site, O(24) is bonded to one Li(6), one Co(1), one Co(7), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLiCo2Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2Co3(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.963
_cell_length_b   8.854
_cell_length_c   13.301
_cell_angle_alpha   108.293
_cell_angle_beta   99.762
_cell_angle_gamma   90.749
_symmetry_Int_Tables_number   1
_cell_volume   545.615
_cell_formula_units_Z   3
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  0.444  0.352  0.768  1.0
  Li  Li1  1  0.385  0.628  0.691  1.0
  Li  Li2  1  0.270  0.534  0.476  1.0
  Li  Li3  1  0.483  0.098  0.855  1.0
  Li  Li4  1  0.726  0.342  0.359  1.0
  Li  Li5  1  0.609  0.215  0.093  1.0
  Co  Co6  1  0.003  0.010  0.996  1.0
  Co  Co7  1  0.273  0.208  0.492  1.0
  Co  Co8  1  0.213  0.454  0.185  1.0
  Co  Co9  1  0.287  0.861  0.342  1.0
  Co  Co10  1  0.919  0.602  0.839  1.0
  Co  Co11  1  0.606  0.531  0.038  1.0
  Co  Co12  1  0.683  0.921  0.188  1.0
  Co  Co13  1  0.933  0.125  0.688  1.0
  Co  Co14  1  0.857  0.714  0.540  1.0
  Si  Si15  1  0.028  0.318  0.934  1.0
  Si  Si16  1  0.484  0.802  0.938  1.0
  Si  Si17  1  0.188  0.149  0.249  1.0
  Si  Si18  1  0.386  0.931  0.599  1.0
  Si  Si19  1  0.827  0.410  0.597  1.0
  Si  Si20  1  0.768  0.638  0.286  1.0
  O  O21  1  0.043  0.548  0.591  1.0
  O  O22  1  0.023  0.260  0.602  1.0
  O  O23  1  0.172  0.246  0.828  1.0
  O  O24  1  0.069  0.917  0.619  1.0
  O  O25  1  0.373  0.982  0.963  1.0
  O  O26  1  0.052  0.225  0.356  1.0
  O  O27  1  0.301  0.658  0.839  1.0
  O  O28  1  0.390  0.992  0.493  1.0
  O  O29  1  0.388  0.277  0.223  1.0
  O  O30  1  0.489  0.748  0.576  1.0
  O  O31  1  0.561  0.069  0.705  1.0
  O  O32  1  0.385  0.006  0.264  1.0
  O  O33  1  0.289  0.392  0.035  1.0
  O  O34  1  0.434  0.650  0.279  1.0
  O  O35  1  0.784  0.814  0.902  1.0
  O  O36  1  0.572  0.364  0.492  1.0
  O  O37  1  0.680  0.469  0.704  1.0
  O  O38  1  0.821  0.459  0.920  1.0
  O  O39  1  0.832  0.192  0.961  1.0
  O  O40  1  0.529  0.753  0.050  1.0
  O  O41  1  0.909  0.589  0.390  1.0
  O  O42  1  0.818  0.498  0.175  1.0
  O  O43  1  0.890  0.813  0.287  1.0
  O  O44  1  0.923  0.074  0.147  1.0
[/CIF]
.
The structure described by Li2Co3(SiO4)2 crystallizes in the triclinic P1 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(11), one O(17), one O(18), and one O(3) atom. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(17), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(5)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  an edgeedge with one Li(3)O4 trigonal pyramid. In the third Li site, Li(3) is bonded to one O(1), one O(10), one O(16), and one O(21) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra,  an edgeedge with one Li(2)O4 tetrahedra, and  an edgeedge with one Co(9)O4 tetrahedra. In the fourth Li site, Li(4) is bonded in a distorted rectangular see-saw-like geometry to one O(11), one O(19), one O(3), and one O(5) atom. In the fifth Li site, Li(5) is bonded to one O(16), one O(21), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. The corner-sharing octahedral tilt angles are 80°. In the sixth Li site, Li(6) is bonded to one O(13), one O(19), one O(22), one O(24), one O(5), and one O(9) atom to form distorted LiO6 octahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Co(1)O4 tetrahedra,  an edgeedge with one Co(3)O4 tetrahedra, and  an edgeedge with one Co(6)O4 tetrahedra. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(15), one O(19), one O(24), and one O(5) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 80°. In the second Co site, Co(2) is bonded to one O(16), one O(2), one O(6), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(5)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. In the third Co site, Co(3) is bonded to one O(13), one O(14), one O(22), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Co(6)O4 tetrahedra, corners with two equivalent Si(6)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. The corner-sharing octahedral tilt angles are 81°. In the fourth Co site, Co(4) is bonded to one O(12), one O(14), one O(23), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Co(7)O4 tetrahedra, and corners with two equivalent Si(6)O4 tetrahedra. In the fifth Co site, Co(5) is bonded to one O(15), one O(17), one O(18), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the sixth Co site, Co(6) is bonded to one O(13), one O(18), one O(20), and one O(22) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Li(6)O6 octahedra. In the seventh Co site, Co(7) is bonded to one O(12), one O(20), one O(23), and one O(24) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 80°. In the eighth Co site, Co(8) is bonded to one O(11), one O(2), one O(3), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the ninth Co site, Co(9) is bonded to one O(1), one O(10), one O(21), and one O(4) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra,  a cornercorner with one Si(6)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(3)O4 trigonal pyramid, and  an edgeedge with one Li(3)O4 trigonal pyramid. There are six inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(18), one O(19), and one O(3) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra, and corners with two equivalent Co(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-59°. In the second Si site, Si(2) is bonded to one O(15), one O(20), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. In the third Si site, Si(3) is bonded to one O(12), one O(24), one O(6), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Li(6)O6 octahedra,  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(3)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 56°. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(4)O4 tetrahedra, corners with two equivalent Co(8)O4 tetrahedra, corners with two equivalent Co(9)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. In the fifth Si site, Si(5) is bonded to one O(1), one O(16), one O(17), and one O(2) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(5)O4 tetrahedra,  a cornercorner with one Co(8)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Li(3)O4 trigonal pyramids. In the sixth Si site, Si(6) is bonded to one O(14), one O(21), one O(22), and one O(23) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(6)O6 octahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Co(6)O4 tetrahedra,  a cornercorner with one Co(7)O4 tetrahedra,  a cornercorner with one Co(9)O4 tetrahedra, corners with two equivalent Co(3)O4 tetrahedra, corners with two equivalent Co(4)O4 tetrahedra, and  a cornercorner with one Li(3)O4 trigonal pyramid. The corner-sharing octahedral tilt angles are 51°. There are twenty-four inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(3), one Co(9), and one Si(5) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi trigonal pyramids. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(8), and one Si(5) atom. In the third O site, O(3) is bonded to one Li(1), one Li(4), one Co(8), and one Si(1) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(18)LiCo2Si tetrahedra, and corners with two equivalent O(19)Li2CoSi trigonal pyramids. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Co(8), one Co(9), and one Si(4) atom. In the fifth O site, O(5) is bonded to one Li(4), one Li(6), one Co(1), and one Si(2) atom to form distorted OLi2CoSi tetrahedra that share  a cornercorner with one O(3)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra,  a cornercorner with one O(19)Li2CoSi trigonal pyramid, and  an edgeedge with one O(19)Li2CoSi trigonal pyramid. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(5), one Co(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(5), and one Si(2) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Co(2), one Co(4), and one Si(4) atom. In the ninth O site, O(9) is bonded to one Li(5), one Li(6), one Co(3), and one Si(3) atom to form OLi2CoSi tetrahedra that share  a cornercorner with one O(16)Li2CoSi tetrahedra,  a cornercorner with one O(21)Li2CoSi tetrahedra,  a cornercorner with one O(5)Li2CoSi tetrahedra, corners with two equivalent O(24)LiCo2Si tetrahedra, and  a cornercorner with one O(19)Li2CoSi trigonal pyramid. In the tenth O site, O(10) is bonded to one Li(2), one Li(3), one Co(9), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(1), one Li(4), one Co(8), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(3) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(1) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Co(3), one Co(4), and one Si(6) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(5), and one Si(2) atom. In the sixteenth O site, O(16) is bonded to one Li(3), one Li(5), one Co(2), and one Si(5) atom to form distorted corner-sharing OLi2CoSi tetrahedra. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Li(2), one Co(5), and one Si(5) atom. In the eighteenth O site, O(18) is bonded to one Li(1), one Co(5), one Co(6), and one Si(1) atom to form distorted corner-sharing OLiCo2Si tetrahedra. In the nineteenth O site, O(19) is bonded to one Li(4), one Li(6), one Co(1), and one Si(1) atom to form distorted OLi2CoSi trigonal pyramids that share  a cornercorner with one O(5)Li2CoSi tetrahedra,  a cornercorner with one O(9)Li2CoSi tetrahedra,  a cornercorner with one O(18)LiCo2Si tetrahedra, corners with two equivalent O(3)Li2CoSi tetrahedra,  an edgeedge with one O(5)Li2CoSi tetrahedra, and  an edgeedge with one O(24)LiCo2Si tetrahedra. In the twentieth O site, O(20) is bonded in a trigonal planar geometry to one Co(6), one Co(7), and one Si(2) atom. In the twenty-first O site, O(21) is bonded to one Li(3), one Li(5), one Co(9), and one Si(6) atom to form a mixture of distorted corner and edge-sharing OLi2CoSi tetrahedra. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Li(6), one Co(3), one Co(6), and one Si(6) atom. In the twenty-third O site, O(23) is bonded in a trigonal planar geometry to one Co(4), one Co(7), and one Si(6) atom. In the twenty-fourth O site, O(24) is bonded to one Li(6), one Co(1), one Co(7), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLiCo2Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2Co3(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.963
_cell_length_b   8.854
_cell_length_c   13.301
_cell_angle_alpha   108.293
_cell_angle_beta   99.762
_cell_angle_gamma   90.749
_symmetry_Int_Tables_number   1
_cell_volume   545.615
_cell_formula_units_Z   3
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  0.444  0.352  0.768  1.0
  Li  Li1  1  0.385  0.628  0.691  1.0
  Li  Li2  1  0.270  0.534  0.476  1.0
  Li  Li3  1  0.483  0.098  0.855  1.0
  Li  Li4  1  0.726  0.342  0.359  1.0
  Li  Li5  1  0.609  0.215  0.093  1.0
  Co  Co6  1  0.003  0.010  0.996  1.0
  Co  Co7  1  0.273  0.208  0.492  1.0
  Co  Co8  1  0.213  0.454  0.185  1.0
  Co  Co9  1  0.287  0.861  0.342  1.0
  Co  Co10  1  0.919  0.602  0.839  1.0
  Co  Co11  1  0.606  0.531  0.038  1.0
  Co  Co12  1  0.683  0.921  0.188  1.0
  Co  Co13  1  0.933  0.125  0.688  1.0
  Co  Co14  1  0.857  0.714  0.540  1.0
  Si  Si15  1  0.028  0.318  0.934  1.0
  Si  Si16  1  0.484  0.802  0.938  1.0
  Si  Si17  1  0.188  0.149  0.249  1.0
  Si  Si18  1  0.386  0.931  0.599  1.0
  Si  Si19  1  0.827  0.410  0.597  1.0
  Si  Si20  1  0.768  0.638  0.286  1.0
  O  O21  1  0.043  0.548  0.591  1.0
  O  O22  1  0.023  0.260  0.602  1.0
  O  O23  1  0.172  0.246  0.828  1.0
  O  O24  1  0.069  0.917  0.619  1.0
  O  O25  1  0.373  0.982  0.963  1.0
  O  O26  1  0.052  0.225  0.356  1.0
  O  O27  1  0.301  0.658  0.839  1.0
  O  O28  1  0.390  0.992  0.493  1.0
  O  O29  1  0.388  0.277  0.223  1.0
  O  O30  1  0.489  0.748  0.576  1.0
  O  O31  1  0.561  0.069  0.705  1.0
  O  O32  1  0.385  0.006  0.264  1.0
  O  O33  1  0.289  0.392  0.035  1.0
  O  O34  1  0.434  0.650  0.279  1.0
  O  O35  1  0.784  0.814  0.902  1.0
  O  O36  1  0.572  0.364  0.492  1.0
  O  O37  1  0.680  0.469  0.704  1.0
  O  O38  1  0.821  0.459  0.920  1.0
  O  O39  1  0.832  0.192  0.961  1.0
  O  O40  1  0.529  0.753  0.050  1.0
  O  O41  1  0.909  0.589  0.390  1.0
  O  O42  1  0.818  0.498  0.175  1.0
  O  O43  1  0.890  0.813  0.287  1.0
  O  O44  1  0.923  0.074  0.147  1.0
[/CIF]
.