The structure described by Li2SnSiCO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. Sn(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted SnO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-61°. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Li(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Sn(1), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one Si(1) atom. is represented by the CIF file [CIF]
data_Li2SiSnCO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.568
_cell_length_b   5.114
_cell_length_c   8.668
_cell_angle_alpha   87.837
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   290.903
_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  0.503  0.780  0.783  1.0
  Li  Li1  1  0.997  0.780  0.783  1.0
  Li  Li2  1  0.497  0.220  0.217  1.0
  Li  Li3  1  0.003  0.220  0.217  1.0
  Si  Si4  1  0.750  0.287  0.580  1.0
  Si  Si5  1  0.250  0.713  0.420  1.0
  Sn  Sn6  1  0.250  0.206  0.646  1.0
  Sn  Sn7  1  0.750  0.794  0.354  1.0
  C  C8  1  0.250  0.266  0.946  1.0
  C  C9  1  0.750  0.734  0.054  1.0
  O  O10  1  0.750  0.697  0.911  1.0
  O  O11  1  0.250  0.033  0.887  1.0
  O  O12  1  0.250  0.464  0.841  1.0
  O  O13  1  0.946  0.174  0.677  1.0
  O  O14  1  0.554  0.174  0.677  1.0
  O  O15  1  0.250  0.812  0.599  1.0
  O  O16  1  0.750  0.611  0.566  1.0
  O  O17  1  0.250  0.389  0.434  1.0
  O  O18  1  0.750  0.188  0.401  1.0
  O  O19  1  0.446  0.826  0.323  1.0
  O  O20  1  0.054  0.826  0.323  1.0
  O  O21  1  0.750  0.536  0.159  1.0
  O  O22  1  0.750  0.967  0.113  1.0
  O  O23  1  0.250  0.303  0.089  1.0
[/CIF]
.
The structure described by Li2SnSiCO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. Sn(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form distorted SnO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-61°. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Li(1) and one C(1) atom. In the second O site, O(2) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Li(1), one Sn(1), and one C(1) atom to form distorted edge-sharing OLi2SnC tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Sn(1), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one Si(1) atom. is represented by the CIF file [CIF]
data_Li2SiSnCO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.568
_cell_length_b   5.114
_cell_length_c   8.668
_cell_angle_alpha   87.837
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   290.903
_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  0.503  0.780  0.783  1.0
  Li  Li1  1  0.997  0.780  0.783  1.0
  Li  Li2  1  0.497  0.220  0.217  1.0
  Li  Li3  1  0.003  0.220  0.217  1.0
  Si  Si4  1  0.750  0.287  0.580  1.0
  Si  Si5  1  0.250  0.713  0.420  1.0
  Sn  Sn6  1  0.250  0.206  0.646  1.0
  Sn  Sn7  1  0.750  0.794  0.354  1.0
  C  C8  1  0.250  0.266  0.946  1.0
  C  C9  1  0.750  0.734  0.054  1.0
  O  O10  1  0.750  0.697  0.911  1.0
  O  O11  1  0.250  0.033  0.887  1.0
  O  O12  1  0.250  0.464  0.841  1.0
  O  O13  1  0.946  0.174  0.677  1.0
  O  O14  1  0.554  0.174  0.677  1.0
  O  O15  1  0.250  0.812  0.599  1.0
  O  O16  1  0.750  0.611  0.566  1.0
  O  O17  1  0.250  0.389  0.434  1.0
  O  O18  1  0.750  0.188  0.401  1.0
  O  O19  1  0.446  0.826  0.323  1.0
  O  O20  1  0.054  0.826  0.323  1.0
  O  O21  1  0.750  0.536  0.159  1.0
  O  O22  1  0.750  0.967  0.113  1.0
  O  O23  1  0.250  0.303  0.089  1.0
[/CIF]
.