The material described by LiSnP2O7 crystallizes in the triclinic P-1 space group. Li(1) is bonded in a 3-coordinate geometry to one O(7) and two equivalent O(2) atoms. Sn(1) is bonded to one O(1), one O(4), one O(6), one O(7), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one Sn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 50-58°. In the second P site, P(2) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-59°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Sn(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Sn(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(1), one Sn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_LiSnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.663
_cell_length_b   6.737
_cell_length_c   6.821
_cell_angle_alpha   66.616
_cell_angle_beta   80.892
_cell_angle_gamma   81.395
_symmetry_Int_Tables_number   1
_cell_volume   276.209
_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  0.881  0.339  0.143  1.0
  Li  Li1  1  0.119  0.661  0.857  1.0
  Sn  Sn2  1  0.675  0.113  0.748  1.0
  Sn  Sn3  1  0.325  0.887  0.252  1.0
  P  P4  1  0.847  0.775  0.234  1.0
  P  P5  1  0.608  0.649  0.676  1.0
  P  P6  1  0.392  0.351  0.324  1.0
  P  P7  1  0.153  0.225  0.766  1.0
  O  O8  1  0.012  0.083  0.729  1.0
  O  O9  1  0.950  0.622  0.130  1.0
  O  O10  1  0.741  0.623  0.463  1.0
  O  O11  1  0.725  0.788  0.742  1.0
  O  O12  1  0.665  0.931  0.114  1.0
  O  O13  1  0.606  0.413  0.836  1.0
  O  O14  1  0.608  0.247  0.388  1.0
  O  O15  1  0.392  0.753  0.612  1.0
  O  O16  1  0.394  0.587  0.164  1.0
  O  O17  1  0.335  0.069  0.886  1.0
  O  O18  1  0.275  0.212  0.258  1.0
  O  O19  1  0.259  0.377  0.537  1.0
  O  O20  1  0.050  0.378  0.870  1.0
  O  O21  1  0.988  0.917  0.271  1.0
[/CIF]
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The material described by LiSnP2O7 crystallizes in the triclinic P-1 space group. Li(1) is bonded in a 3-coordinate geometry to one O(7) and two equivalent O(2) atoms. Sn(1) is bonded to one O(1), one O(4), one O(6), one O(7), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one Sn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 50-58°. In the second P site, P(2) is bonded to one O(3), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-59°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Sn(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Sn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Sn(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(1), one Sn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_LiSnP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.663
_cell_length_b   6.737
_cell_length_c   6.821
_cell_angle_alpha   66.616
_cell_angle_beta   80.892
_cell_angle_gamma   81.395
_symmetry_Int_Tables_number   1
_cell_volume   276.209
_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  0.881  0.339  0.143  1.0
  Li  Li1  1  0.119  0.661  0.857  1.0
  Sn  Sn2  1  0.675  0.113  0.748  1.0
  Sn  Sn3  1  0.325  0.887  0.252  1.0
  P  P4  1  0.847  0.775  0.234  1.0
  P  P5  1  0.608  0.649  0.676  1.0
  P  P6  1  0.392  0.351  0.324  1.0
  P  P7  1  0.153  0.225  0.766  1.0
  O  O8  1  0.012  0.083  0.729  1.0
  O  O9  1  0.950  0.622  0.130  1.0
  O  O10  1  0.741  0.623  0.463  1.0
  O  O11  1  0.725  0.788  0.742  1.0
  O  O12  1  0.665  0.931  0.114  1.0
  O  O13  1  0.606  0.413  0.836  1.0
  O  O14  1  0.608  0.247  0.388  1.0
  O  O15  1  0.392  0.753  0.612  1.0
  O  O16  1  0.394  0.587  0.164  1.0
  O  O17  1  0.335  0.069  0.886  1.0
  O  O18  1  0.275  0.212  0.258  1.0
  O  O19  1  0.259  0.377  0.537  1.0
  O  O20  1  0.050  0.378  0.870  1.0
  O  O21  1  0.988  0.917  0.271  1.0
[/CIF]
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