The material structure described by Li3Co2(SiO4)2 crystallizes in the monoclinic C2 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(3) atoms. In the second Li site, Li(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form LiO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra and  an edgeedge with one Co(2)O4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form distorted CoO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Co(1)O4 tetrahedra. 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 Li(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Co(1), and one Si(1) atom. In the third O site, O(3) is bonded in a see-saw-like geometry to one Li(2), two equivalent Li(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Li3Co2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.216
_cell_length_b   5.216
_cell_length_c   6.742
_cell_angle_alpha   87.631
_cell_angle_beta   87.631
_cell_angle_gamma   87.158
_symmetry_Int_Tables_number   1
_cell_volume   182.928
_cell_formula_units_Z   1
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  0.897  0.420  0.050  1.0
  Li  Li1  1  0.580  0.103  0.950  1.0
  Li  Li2  1  0.138  0.862  0.000  1.0
  Co  Co3  1  0.806  0.194  0.500  1.0
  Co  Co4  1  0.200  0.800  0.500  1.0
  Si  Si5  1  0.681  0.668  0.750  1.0
  Si  Si6  1  0.332  0.319  0.250  1.0
  O  O7  1  0.832  0.807  0.553  1.0
  O  O8  1  0.722  0.355  0.752  1.0
  O  O9  1  0.788  0.775  0.951  1.0
  O  O10  1  0.645  0.278  0.248  1.0
  O  O11  1  0.372  0.763  0.733  1.0
  O  O12  1  0.225  0.212  0.049  1.0
  O  O13  1  0.237  0.628  0.267  1.0
  O  O14  1  0.193  0.168  0.447  1.0
[/CIF]
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The material structure described by Li3Co2(SiO4)2 crystallizes in the monoclinic C2 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(3) atoms. In the second Li site, Li(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form LiO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra and corners with four equivalent Si(1)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form CoO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra and  an edgeedge with one Co(2)O4 tetrahedra. In the second Co site, Co(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form distorted CoO4 tetrahedra that share corners with two equivalent Li(2)O4 tetrahedra, corners with four equivalent Si(1)O4 tetrahedra, and  an edgeedge with one Co(1)O4 tetrahedra. 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 Li(2)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Si(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Co(1), and one Si(1) atom. In the third O site, O(3) is bonded in a see-saw-like geometry to one Li(2), two equivalent Li(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(2), one Co(2), and one Si(1) atom. is represented by the CIF file [CIF]
data_Li3Co2(SiO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.216
_cell_length_b   5.216
_cell_length_c   6.742
_cell_angle_alpha   87.631
_cell_angle_beta   87.631
_cell_angle_gamma   87.158
_symmetry_Int_Tables_number   1
_cell_volume   182.928
_cell_formula_units_Z   1
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  0.897  0.420  0.050  1.0
  Li  Li1  1  0.580  0.103  0.950  1.0
  Li  Li2  1  0.138  0.862  0.000  1.0
  Co  Co3  1  0.806  0.194  0.500  1.0
  Co  Co4  1  0.200  0.800  0.500  1.0
  Si  Si5  1  0.681  0.668  0.750  1.0
  Si  Si6  1  0.332  0.319  0.250  1.0
  O  O7  1  0.832  0.807  0.553  1.0
  O  O8  1  0.722  0.355  0.752  1.0
  O  O9  1  0.788  0.775  0.951  1.0
  O  O10  1  0.645  0.278  0.248  1.0
  O  O11  1  0.372  0.763  0.733  1.0
  O  O12  1  0.225  0.212  0.049  1.0
  O  O13  1  0.237  0.628  0.267  1.0
  O  O14  1  0.193  0.168  0.447  1.0
[/CIF]
.