The material structure described by Li5Co2(SiO5)2 crystallizes in the monoclinic Pc space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(3), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(4), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(10), one O(4), one O(5), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(3), one O(5), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(1), one O(10), one O(2), and one O(8) atom to form CoO4 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 Co(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(4), one O(5), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(10), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(2), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Co(1), and one Co(2) atom to form OLi2Co2 tetrahedra that share  a cornercorner with one O(10)Li2CoSi tetrahedra,  a cornercorner with one O(6)Li3Si tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, and corners with two equivalent O(4)Li3Si tetrahedra. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(5), and one Si(2) atom. In the fourth O site, O(4) is bonded to one Li(1), one Li(3), one Li(4), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(10)Li2CoSi tetrahedra, corners with two equivalent O(2)Li2Co2 tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, corners with two equivalent O(5)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Li(4), one Li(5), and one Si(1) atom to form OLi3Si tetrahedra that share corners with two equivalent O(10)Li2CoSi tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, corners with two equivalent O(4)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. In the sixth O site, O(6) is bonded to one Li(1), one Li(4), one Li(5), and one Si(2) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Co2 tetrahedra, corners with two equivalent O(10)Li2CoSi tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, corners with two equivalent O(4)Li3Si tetrahedra, and corners with two equivalent O(5)Li3Si tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Li(3), one Co(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(3), one Co(2), and one Si(2) atom. In the ninth O site, O(9) is bonded to one Li(1), one Li(5), one Co(1), and one Si(1) atom to form OLi2CoSi tetrahedra that share corners with two equivalent O(2)Li2Co2 tetrahedra, corners with two equivalent O(4)Li3Si tetrahedra, corners with two equivalent O(5)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. In the tenth O site, O(10) is bonded to one Li(2), one Li(4), one Co(2), and one Si(2) atom to form OLi2CoSi tetrahedra that share  a cornercorner with one O(2)Li2Co2 tetrahedra,  a cornercorner with one O(4)Li3Si tetrahedra, corners with two equivalent O(5)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li5Co2(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.512
_cell_length_b   4.929
_cell_length_c   16.599
_cell_angle_alpha   73.075
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   431.503
_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  0.580  0.593  0.407  1.0
  Li  Li1  1  0.083  0.903  0.095  1.0
  Li  Li2  1  0.574  0.206  0.803  1.0
  Li  Li3  1  0.589  0.006  0.996  1.0
  Li  Li4  1  0.089  0.489  0.507  1.0
  Li  Li5  1  0.917  0.903  0.595  1.0
  Li  Li6  1  0.420  0.593  0.907  1.0
  Li  Li7  1  0.426  0.206  0.303  1.0
  Li  Li8  1  0.911  0.489  0.007  1.0
  Li  Li9  1  0.411  0.006  0.496  1.0
  Co  Co10  1  0.922  0.700  0.799  1.0
  Co  Co11  1  0.426  0.802  0.697  1.0
  Co  Co12  1  0.078  0.700  0.299  1.0
  Co  Co13  1  0.574  0.802  0.197  1.0
  Si  Si14  1  0.085  0.104  0.904  1.0
  Si  Si15  1  0.587  0.417  0.596  1.0
  Si  Si16  1  0.915  0.104  0.404  1.0
  Si  Si17  1  0.413  0.417  0.096  1.0
  O  O18  1  0.910  0.859  0.205  1.0
  O  O19  1  0.398  0.804  0.296  1.0
  O  O20  1  0.864  0.523  0.588  1.0
  O  O21  1  0.368  0.202  0.899  1.0
  O  O22  1  0.938  0.109  0.988  1.0
  O  O23  1  0.425  0.587  0.515  1.0
  O  O24  1  0.925  0.313  0.823  1.0
  O  O25  1  0.474  0.443  0.688  1.0
  O  O26  1  0.930  0.776  0.390  1.0
  O  O27  1  0.432  0.066  0.106  1.0
  O  O28  1  0.602  0.804  0.796  1.0
  O  O29  1  0.090  0.859  0.705  1.0
  O  O30  1  0.632  0.202  0.399  1.0
  O  O31  1  0.136  0.523  0.088  1.0
  O  O32  1  0.062  0.109  0.488  1.0
  O  O33  1  0.575  0.587  0.015  1.0
  O  O34  1  0.075  0.313  0.323  1.0
  O  O35  1  0.526  0.443  0.188  1.0
  O  O36  1  0.070  0.776  0.890  1.0
  O  O37  1  0.568  0.066  0.606  1.0
[/CIF]
.
The material structure described by Li5Co2(SiO5)2 crystallizes in the monoclinic Pc space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(10), one O(3), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(2), one O(4), one O(7), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Co(1)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(10), one O(4), one O(5), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(3), one O(5), one O(6), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(7), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(1), one O(10), one O(2), and one O(8) atom to form CoO4 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 Co(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(4), one O(5), one O(7), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(1)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(10), one O(3), one O(6), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(2), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded to one Li(1), one Li(3), one Co(1), and one Co(2) atom to form OLi2Co2 tetrahedra that share  a cornercorner with one O(10)Li2CoSi tetrahedra,  a cornercorner with one O(6)Li3Si tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, and corners with two equivalent O(4)Li3Si tetrahedra. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Li(2), one Li(5), and one Si(2) atom. In the fourth O site, O(4) is bonded to one Li(1), one Li(3), one Li(4), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(10)Li2CoSi tetrahedra, corners with two equivalent O(2)Li2Co2 tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, corners with two equivalent O(5)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. In the fifth O site, O(5) is bonded to one Li(2), one Li(4), one Li(5), and one Si(1) atom to form OLi3Si tetrahedra that share corners with two equivalent O(10)Li2CoSi tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, corners with two equivalent O(4)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. In the sixth O site, O(6) is bonded to one Li(1), one Li(4), one Li(5), and one Si(2) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Co2 tetrahedra, corners with two equivalent O(10)Li2CoSi tetrahedra, corners with two equivalent O(9)Li2CoSi tetrahedra, corners with two equivalent O(4)Li3Si tetrahedra, and corners with two equivalent O(5)Li3Si tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Li(3), one Co(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Li(3), one Co(2), and one Si(2) atom. In the ninth O site, O(9) is bonded to one Li(1), one Li(5), one Co(1), and one Si(1) atom to form OLi2CoSi tetrahedra that share corners with two equivalent O(2)Li2Co2 tetrahedra, corners with two equivalent O(4)Li3Si tetrahedra, corners with two equivalent O(5)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. In the tenth O site, O(10) is bonded to one Li(2), one Li(4), one Co(2), and one Si(2) atom to form OLi2CoSi tetrahedra that share  a cornercorner with one O(2)Li2Co2 tetrahedra,  a cornercorner with one O(4)Li3Si tetrahedra, corners with two equivalent O(5)Li3Si tetrahedra, and corners with two equivalent O(6)Li3Si tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li5Co2(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.512
_cell_length_b   4.929
_cell_length_c   16.599
_cell_angle_alpha   73.075
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   431.503
_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  0.580  0.593  0.407  1.0
  Li  Li1  1  0.083  0.903  0.095  1.0
  Li  Li2  1  0.574  0.206  0.803  1.0
  Li  Li3  1  0.589  0.006  0.996  1.0
  Li  Li4  1  0.089  0.489  0.507  1.0
  Li  Li5  1  0.917  0.903  0.595  1.0
  Li  Li6  1  0.420  0.593  0.907  1.0
  Li  Li7  1  0.426  0.206  0.303  1.0
  Li  Li8  1  0.911  0.489  0.007  1.0
  Li  Li9  1  0.411  0.006  0.496  1.0
  Co  Co10  1  0.922  0.700  0.799  1.0
  Co  Co11  1  0.426  0.802  0.697  1.0
  Co  Co12  1  0.078  0.700  0.299  1.0
  Co  Co13  1  0.574  0.802  0.197  1.0
  Si  Si14  1  0.085  0.104  0.904  1.0
  Si  Si15  1  0.587  0.417  0.596  1.0
  Si  Si16  1  0.915  0.104  0.404  1.0
  Si  Si17  1  0.413  0.417  0.096  1.0
  O  O18  1  0.910  0.859  0.205  1.0
  O  O19  1  0.398  0.804  0.296  1.0
  O  O20  1  0.864  0.523  0.588  1.0
  O  O21  1  0.368  0.202  0.899  1.0
  O  O22  1  0.938  0.109  0.988  1.0
  O  O23  1  0.425  0.587  0.515  1.0
  O  O24  1  0.925  0.313  0.823  1.0
  O  O25  1  0.474  0.443  0.688  1.0
  O  O26  1  0.930  0.776  0.390  1.0
  O  O27  1  0.432  0.066  0.106  1.0
  O  O28  1  0.602  0.804  0.796  1.0
  O  O29  1  0.090  0.859  0.705  1.0
  O  O30  1  0.632  0.202  0.399  1.0
  O  O31  1  0.136  0.523  0.088  1.0
  O  O32  1  0.062  0.109  0.488  1.0
  O  O33  1  0.575  0.587  0.015  1.0
  O  O34  1  0.075  0.313  0.323  1.0
  O  O35  1  0.526  0.443  0.188  1.0
  O  O36  1  0.070  0.776  0.890  1.0
  O  O37  1  0.568  0.066  0.606  1.0
[/CIF]
.