The structure described by Li2SnP2O7 crystallizes in the monoclinic C2/c space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra and  an edgeedge with one Li(1)O4 tetrahedra. Sn(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with four equivalent Li(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Li(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent P(1) atoms. is represented by the CIF file [CIF]
data_Li2SnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.345
_cell_length_b   8.345
_cell_length_c   9.464
_cell_angle_alpha   65.074
_cell_angle_beta   65.074
_cell_angle_gamma   36.567
_symmetry_Int_Tables_number   1
_cell_volume   351.830
_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  0.839  0.553  0.448  1.0
  Li  Li1  1  0.553  0.839  0.948  1.0
  Li  Li2  1  0.447  0.161  0.052  1.0
  Li  Li3  1  0.161  0.447  0.552  1.0
  Sn  Sn4  1  0.500  0.500  0.500  1.0
  Sn  Sn5  1  0.500  0.500  0.000  1.0
  P  P6  1  0.986  0.231  0.182  1.0
  P  P7  1  0.231  0.986  0.682  1.0
  P  P8  1  0.769  0.014  0.318  1.0
  P  P9  1  0.014  0.769  0.818  1.0
  O  O10  1  0.276  0.068  0.108  1.0
  O  O11  1  0.068  0.276  0.608  1.0
  O  O12  1  0.780  0.451  0.064  1.0
  O  O13  1  0.887  0.352  0.324  1.0
  O  O14  1  0.451  0.780  0.564  1.0
  O  O15  1  0.352  0.887  0.824  1.0
  O  O16  1  0.998  0.002  0.250  1.0
  O  O17  1  0.002  0.998  0.750  1.0
  O  O18  1  0.648  0.113  0.176  1.0
  O  O19  1  0.549  0.220  0.436  1.0
  O  O20  1  0.113  0.648  0.676  1.0
  O  O21  1  0.220  0.549  0.936  1.0
  O  O22  1  0.932  0.724  0.392  1.0
  O  O23  1  0.724  0.932  0.892  1.0
[/CIF]
.
The structure described by Li2SnP2O7 crystallizes in the monoclinic C2/c space group. Li(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form LiO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra and  an edgeedge with one Li(1)O4 tetrahedra. Sn(1) is bonded in a square co-planar geometry to two equivalent O(2) and two equivalent O(3) atoms. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with four equivalent Li(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Li(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent P(1) atoms. is represented by the CIF file [CIF]
data_Li2SnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.345
_cell_length_b   8.345
_cell_length_c   9.464
_cell_angle_alpha   65.074
_cell_angle_beta   65.074
_cell_angle_gamma   36.567
_symmetry_Int_Tables_number   1
_cell_volume   351.830
_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  0.839  0.553  0.448  1.0
  Li  Li1  1  0.553  0.839  0.948  1.0
  Li  Li2  1  0.447  0.161  0.052  1.0
  Li  Li3  1  0.161  0.447  0.552  1.0
  Sn  Sn4  1  0.500  0.500  0.500  1.0
  Sn  Sn5  1  0.500  0.500  0.000  1.0
  P  P6  1  0.986  0.231  0.182  1.0
  P  P7  1  0.231  0.986  0.682  1.0
  P  P8  1  0.769  0.014  0.318  1.0
  P  P9  1  0.014  0.769  0.818  1.0
  O  O10  1  0.276  0.068  0.108  1.0
  O  O11  1  0.068  0.276  0.608  1.0
  O  O12  1  0.780  0.451  0.064  1.0
  O  O13  1  0.887  0.352  0.324  1.0
  O  O14  1  0.451  0.780  0.564  1.0
  O  O15  1  0.352  0.887  0.824  1.0
  O  O16  1  0.998  0.002  0.250  1.0
  O  O17  1  0.002  0.998  0.750  1.0
  O  O18  1  0.648  0.113  0.176  1.0
  O  O19  1  0.549  0.220  0.436  1.0
  O  O20  1  0.113  0.648  0.676  1.0
  O  O21  1  0.220  0.549  0.936  1.0
  O  O22  1  0.932  0.724  0.392  1.0
  O  O23  1  0.724  0.932  0.892  1.0
[/CIF]
.