The material structure described by Li2Co2Si2O7 crystallizes in the orthorhombic Ama2 space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form distorted LiO4 trigonal pyramids that share corners with two equivalent Co(2)O5 square pyramids, corners with four equivalent Si(1)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Co site, Co(2) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CoO5 square pyramids that share corners with six equivalent Si(1)O4 tetrahedra and corners with four equivalent Li(1)O4 trigonal pyramids. 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 three equivalent Co(2)O5 square pyramids,  a cornercorner with one Si(1)O4 tetrahedra, and corners with four equivalent Li(1)O4 trigonal pyramids. There are four inequivalent O sites. In the first O site, O(4) is bonded to two equivalent Li(1), one Co(1), and one Si(1) atom to form distorted OLi2CoSi tetrahedra that share corners with three equivalent O(4)Li2CoSi tetrahedra and corners with five equivalent O(3)LiCo2Si tetrahedra. In the second O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Co(2) and two equivalent Si(1) atoms. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Li(1), one Co(1), one Co(2), and one Si(1) atom. In the fourth O site, O(3) is bonded to one Li(1), one Co(1), one Co(2), and one Si(1) atom to form distorted OLiCo2Si tetrahedra that share corners with two equivalent O(3)LiCo2Si tetrahedra and corners with five equivalent O(4)Li2CoSi tetrahedra. is represented by the CIF card [CIF]
data_Li2Co2Si2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.881
_cell_length_b   13.201
_cell_length_c   4.879
_cell_angle_alpha   90.011
_cell_angle_beta   62.710
_cell_angle_gamma   89.982
_symmetry_Int_Tables_number   1
_cell_volume   279.397
_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  0.252  0.584  0.344  1.0
  Li  Li1  1  0.252  0.916  0.344  1.0
  Li  Li2  1  0.656  0.084  0.748  1.0
  Li  Li3  1  0.656  0.416  0.748  1.0
  Co  Co4  1  0.972  0.000  0.028  1.0
  Co  Co5  1  0.972  0.500  0.028  1.0
  Co  Co6  1  0.991  0.750  0.008  1.0
  Co  Co7  1  0.993  0.250  0.009  1.0
  Si  Si8  1  0.302  0.137  0.397  1.0
  Si  Si9  1  0.302  0.363  0.397  1.0
  Si  Si10  1  0.603  0.637  0.698  1.0
  Si  Si11  1  0.603  0.863  0.698  1.0
  O  O12  1  0.147  0.250  0.371  1.0
  O  O13  1  0.629  0.750  0.853  1.0
  O  O14  1  0.663  0.136  0.134  1.0
  O  O15  1  0.663  0.364  0.135  1.0
  O  O16  1  0.866  0.864  0.337  1.0
  O  O17  1  0.866  0.636  0.337  1.0
  O  O18  1  0.253  0.870  0.728  1.0
  O  O19  1  0.253  0.630  0.728  1.0
  O  O20  1  0.272  0.370  0.747  1.0
  O  O21  1  0.272  0.130  0.747  1.0
  O  O22  1  0.076  0.053  0.369  1.0
  O  O23  1  0.076  0.447  0.369  1.0
  O  O24  1  0.631  0.553  0.924  1.0
  O  O25  1  0.631  0.947  0.924  1.0
[/CIF]
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The material structure described by Li2Co2Si2O7 crystallizes in the orthorhombic Ama2 space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form distorted LiO4 trigonal pyramids that share corners with two equivalent Co(2)O5 square pyramids, corners with four equivalent Si(1)O4 tetrahedra, and corners with two equivalent Li(1)O4 trigonal pyramids. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Co site, Co(2) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CoO5 square pyramids that share corners with six equivalent Si(1)O4 tetrahedra and corners with four equivalent Li(1)O4 trigonal pyramids. 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 three equivalent Co(2)O5 square pyramids,  a cornercorner with one Si(1)O4 tetrahedra, and corners with four equivalent Li(1)O4 trigonal pyramids. There are four inequivalent O sites. In the first O site, O(4) is bonded to two equivalent Li(1), one Co(1), and one Si(1) atom to form distorted OLi2CoSi tetrahedra that share corners with three equivalent O(4)Li2CoSi tetrahedra and corners with five equivalent O(3)LiCo2Si tetrahedra. In the second O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Co(2) and two equivalent Si(1) atoms. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Li(1), one Co(1), one Co(2), and one Si(1) atom. In the fourth O site, O(3) is bonded to one Li(1), one Co(1), one Co(2), and one Si(1) atom to form distorted OLiCo2Si tetrahedra that share corners with two equivalent O(3)LiCo2Si tetrahedra and corners with five equivalent O(4)Li2CoSi tetrahedra. is represented by the CIF card [CIF]
data_Li2Co2Si2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.881
_cell_length_b   13.201
_cell_length_c   4.879
_cell_angle_alpha   90.011
_cell_angle_beta   62.710
_cell_angle_gamma   89.982
_symmetry_Int_Tables_number   1
_cell_volume   279.397
_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  0.252  0.584  0.344  1.0
  Li  Li1  1  0.252  0.916  0.344  1.0
  Li  Li2  1  0.656  0.084  0.748  1.0
  Li  Li3  1  0.656  0.416  0.748  1.0
  Co  Co4  1  0.972  0.000  0.028  1.0
  Co  Co5  1  0.972  0.500  0.028  1.0
  Co  Co6  1  0.991  0.750  0.008  1.0
  Co  Co7  1  0.993  0.250  0.009  1.0
  Si  Si8  1  0.302  0.137  0.397  1.0
  Si  Si9  1  0.302  0.363  0.397  1.0
  Si  Si10  1  0.603  0.637  0.698  1.0
  Si  Si11  1  0.603  0.863  0.698  1.0
  O  O12  1  0.147  0.250  0.371  1.0
  O  O13  1  0.629  0.750  0.853  1.0
  O  O14  1  0.663  0.136  0.134  1.0
  O  O15  1  0.663  0.364  0.135  1.0
  O  O16  1  0.866  0.864  0.337  1.0
  O  O17  1  0.866  0.636  0.337  1.0
  O  O18  1  0.253  0.870  0.728  1.0
  O  O19  1  0.253  0.630  0.728  1.0
  O  O20  1  0.272  0.370  0.747  1.0
  O  O21  1  0.272  0.130  0.747  1.0
  O  O22  1  0.076  0.053  0.369  1.0
  O  O23  1  0.076  0.447  0.369  1.0
  O  O24  1  0.631  0.553  0.924  1.0
  O  O25  1  0.631  0.947  0.924  1.0
[/CIF]
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