The material structure described by Li2CoSiO4 crystallizes in the monoclinic P2 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(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(3), one O(6), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(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(1), one O(10), one O(11), and one O(2) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(1), one O(12), one O(2), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(11), one O(3), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(10), one O(12), one O(4), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted square co-planar geometry to one O(1), one O(10), one O(11), and one O(4) atom. In the second Co site, Co(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(5) and two equivalent O(7) atoms. In the third Co site, Co(3) is bonded in a distorted rectangular see-saw-like geometry to one O(12), one O(2), one O(3), and one O(9) atom. In the fourth Co site, Co(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(8) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(10), one O(3), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Li(5)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(4), one O(6), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Li(6)O4 tetrahedra. In the third Si site, Si(3) is bonded to two equivalent O(11) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with four equivalent Li(3)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to two equivalent O(1) and two equivalent O(12) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with four equivalent Li(4)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Li(3), one Li(4), one Co(1), and one Si(4) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the second O site, O(2) is bonded to one Li(3), one Li(4), one Co(3), and one Si(3) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the third O site, O(3) is bonded to one Li(2), one Li(5), one Co(3), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(6), one Co(1), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the fifth O site, O(5) is bonded to one Li(1), one Li(5), one Co(2), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the sixth O site, O(6) is bonded to one Li(2), one Li(6), one Co(4), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the seventh O site, O(7) is bonded to one Li(1), one Li(2), one Co(2), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the eighth O site, O(8) is bonded to one Li(1), one Li(2), one Co(4), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the ninth O site, O(9) is bonded to one Li(4), one Li(5), one Co(3), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the tenth O site, O(10) is bonded to one Li(3), one Li(6), one Co(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the eleventh O site, O(11) is bonded to one Li(3), one Li(5), one Co(1), and one Si(3) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the twelfth O site, O(12) is bonded to one Li(4), one Li(6), one Co(3), and one Si(4) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. is represented by the CIF file [CIF]
data_Li2CoSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.037
_cell_length_b   5.039
_cell_length_c   11.534
_cell_angle_alpha   90.002
_cell_angle_beta   89.975
_cell_angle_gamma   60.007
_symmetry_Int_Tables_number   1
_cell_volume   253.542
_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
  Co  Co0  1  0.540  0.999  0.834  1.0
  Co  Co1  1  1.000  0.462  0.500  1.0
  Co  Co2  1  0.461  0.539  0.166  1.0
  Li  Li3  1  0.447  0.672  0.414  1.0
  Li  Li4  1  0.672  0.881  0.081  1.0
  Li  Li5  1  0.881  0.447  0.747  1.0
  Li  Li6  1  0.328  0.553  0.919  1.0
  Li  Li7  1  0.119  0.328  0.253  1.0
  Li  Li8  1  0.553  0.119  0.586  1.0
  O  O9  1  0.291  0.850  0.038  1.0
  O  O10  1  0.850  0.859  0.705  1.0
  O  O11  1  0.150  0.709  0.295  1.0
  O  O12  1  0.860  0.290  0.372  1.0
  O  O13  1  0.140  0.150  0.628  1.0
  O  O14  1  0.709  0.141  0.962  1.0
  O  O15  1  0.681  0.885  0.442  1.0
  O  O16  1  0.433  0.681  0.776  1.0
  O  O17  1  0.886  0.434  0.109  1.0
  O  O18  1  0.115  0.319  0.891  1.0
  O  O19  1  0.319  0.566  0.558  1.0
  O  O20  1  0.567  0.115  0.224  1.0
  Si  Si21  1  0.813  0.000  0.333  1.0
  Si  Si22  1  0.187  0.813  0.667  1.0
  Si  Si23  1  0.000  0.187  1.000  1.0
[/CIF]
.
The material structure described by Li2CoSiO4 crystallizes in the monoclinic P2 space group. There are six inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(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(3), one O(6), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(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(1), one O(10), one O(11), and one O(2) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(1), one O(12), one O(2), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(11), one O(3), one O(5), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(10), one O(12), one O(4), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded in a distorted square co-planar geometry to one O(1), one O(10), one O(11), and one O(4) atom. In the second Co site, Co(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(5) and two equivalent O(7) atoms. In the third Co site, Co(3) is bonded in a distorted rectangular see-saw-like geometry to one O(12), one O(2), one O(3), and one O(9) atom. In the fourth Co site, Co(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(6) and two equivalent O(8) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(10), one O(3), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Li(5)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(4), one O(6), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Li(6)O4 tetrahedra. In the third Si site, Si(3) is bonded to two equivalent O(11) and two equivalent O(2) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with four equivalent Li(3)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to two equivalent O(1) and two equivalent O(12) atoms to form SiO4 tetrahedra that share corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with four equivalent Li(4)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Li(3), one Li(4), one Co(1), and one Si(4) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the second O site, O(2) is bonded to one Li(3), one Li(4), one Co(3), and one Si(3) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the third O site, O(3) is bonded to one Li(2), one Li(5), one Co(3), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the fourth O site, O(4) is bonded to one Li(1), one Li(6), one Co(1), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the fifth O site, O(5) is bonded to one Li(1), one Li(5), one Co(2), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the sixth O site, O(6) is bonded to one Li(2), one Li(6), one Co(4), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the seventh O site, O(7) is bonded to one Li(1), one Li(2), one Co(2), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the eighth O site, O(8) is bonded to one Li(1), one Li(2), one Co(4), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the ninth O site, O(9) is bonded to one Li(4), one Li(5), one Co(3), and one Si(2) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the tenth O site, O(10) is bonded to one Li(3), one Li(6), one Co(1), and one Si(1) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the eleventh O site, O(11) is bonded to one Li(3), one Li(5), one Co(1), and one Si(3) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. In the twelfth O site, O(12) is bonded to one Li(4), one Li(6), one Co(3), and one Si(4) atom to form a mixture of distorted edge and corner-sharing OLi2CoSi tetrahedra. is represented by the CIF file [CIF]
data_Li2CoSiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.037
_cell_length_b   5.039
_cell_length_c   11.534
_cell_angle_alpha   90.002
_cell_angle_beta   89.975
_cell_angle_gamma   60.007
_symmetry_Int_Tables_number   1
_cell_volume   253.542
_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
  Co  Co0  1  0.540  0.999  0.834  1.0
  Co  Co1  1  1.000  0.462  0.500  1.0
  Co  Co2  1  0.461  0.539  0.166  1.0
  Li  Li3  1  0.447  0.672  0.414  1.0
  Li  Li4  1  0.672  0.881  0.081  1.0
  Li  Li5  1  0.881  0.447  0.747  1.0
  Li  Li6  1  0.328  0.553  0.919  1.0
  Li  Li7  1  0.119  0.328  0.253  1.0
  Li  Li8  1  0.553  0.119  0.586  1.0
  O  O9  1  0.291  0.850  0.038  1.0
  O  O10  1  0.850  0.859  0.705  1.0
  O  O11  1  0.150  0.709  0.295  1.0
  O  O12  1  0.860  0.290  0.372  1.0
  O  O13  1  0.140  0.150  0.628  1.0
  O  O14  1  0.709  0.141  0.962  1.0
  O  O15  1  0.681  0.885  0.442  1.0
  O  O16  1  0.433  0.681  0.776  1.0
  O  O17  1  0.886  0.434  0.109  1.0
  O  O18  1  0.115  0.319  0.891  1.0
  O  O19  1  0.319  0.566  0.558  1.0
  O  O20  1  0.567  0.115  0.224  1.0
  Si  Si21  1  0.813  0.000  0.333  1.0
  Si  Si22  1  0.187  0.813  0.667  1.0
  Si  Si23  1  0.000  0.187  1.000  1.0
[/CIF]
.