The compound described by Li2CrSn(PO4)2 is Hausmannite-derived structured and crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form LiO6 octahedra that share corners with four equivalent Cr(1)O6 pentagonal pyramids, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Sn(1)O6 pentagonal pyramids, and edges with two equivalent P(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted LiO6 octahedra that share corners with four equivalent Sn(1)O6 pentagonal pyramids, corners with two equivalent P(2)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Cr(1)O6 pentagonal pyramids, and edges with two equivalent P(2)O4 tetrahedra. Cr(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form distorted CrO6 pentagonal pyramids that share corners with four equivalent Li(1)O6 octahedra, corners with four equivalent Sn(1)O6 pentagonal pyramids,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-75°. Sn(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted SnO6 pentagonal pyramids that share corners with four equivalent Li(2)O6 octahedra, corners with four equivalent Cr(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-76°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent Li(1)O6 octahedra,  a cornercorner with one Sn(1)O6 pentagonal pyramid, corners with three equivalent Cr(1)O6 pentagonal pyramids, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one Sn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 54°. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Li(2)O6 octahedra,  a cornercorner with one Cr(1)O6 pentagonal pyramid, corners with three equivalent Sn(1)O6 pentagonal pyramids, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one Cr(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 58°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Cr(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Li(1), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Cr(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(2), one Cr(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Cr(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(2), one Sn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_Li2CrSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.691
_cell_length_b   4.841
_cell_length_c   10.732
_cell_angle_alpha   86.484
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   346.989
_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  0.000  0.000  0.000  1.0
  Li  Li1  1  0.500  0.000  0.000  1.0
  Li  Li2  1  0.000  0.500  0.500  1.0
  Li  Li3  1  0.500  0.500  0.500  1.0
  Cr  Cr4  1  0.250  0.555  0.787  1.0
  Cr  Cr5  1  0.750  0.445  0.213  1.0
  Sn  Sn6  1  0.750  0.041  0.718  1.0
  Sn  Sn7  1  0.250  0.959  0.282  1.0
  P  P8  1  0.750  0.572  0.924  1.0
  P  P9  1  0.250  0.117  0.597  1.0
  P  P10  1  0.750  0.883  0.403  1.0
  P  P11  1  0.250  0.428  0.076  1.0
  O  O12  1  0.250  0.295  0.946  1.0
  O  O13  1  0.750  0.254  0.940  1.0
  O  O14  1  0.938  0.693  0.850  1.0
  O  O15  1  0.562  0.693  0.850  1.0
  O  O16  1  0.435  0.249  0.658  1.0
  O  O17  1  0.065  0.249  0.658  1.0
  O  O18  1  0.250  0.795  0.614  1.0
  O  O19  1  0.750  0.770  0.543  1.0
  O  O20  1  0.250  0.230  0.457  1.0
  O  O21  1  0.750  0.205  0.386  1.0
  O  O22  1  0.935  0.751  0.342  1.0
  O  O23  1  0.565  0.751  0.342  1.0
  O  O24  1  0.438  0.307  0.150  1.0
  O  O25  1  0.062  0.307  0.150  1.0
  O  O26  1  0.250  0.746  0.060  1.0
  O  O27  1  0.750  0.705  0.054  1.0
[/CIF]
.
The compound described by Li2CrSn(PO4)2 is Hausmannite-derived structured and crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form LiO6 octahedra that share corners with four equivalent Cr(1)O6 pentagonal pyramids, corners with two equivalent P(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Sn(1)O6 pentagonal pyramids, and edges with two equivalent P(1)O4 tetrahedra. In the second Li site, Li(2) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted LiO6 octahedra that share corners with four equivalent Sn(1)O6 pentagonal pyramids, corners with two equivalent P(2)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, edges with two equivalent Cr(1)O6 pentagonal pyramids, and edges with two equivalent P(2)O4 tetrahedra. Cr(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form distorted CrO6 pentagonal pyramids that share corners with four equivalent Li(1)O6 octahedra, corners with four equivalent Sn(1)O6 pentagonal pyramids,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-75°. Sn(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted SnO6 pentagonal pyramids that share corners with four equivalent Li(2)O6 octahedra, corners with four equivalent Cr(1)O6 pentagonal pyramids,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-76°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with two equivalent Li(1)O6 octahedra,  a cornercorner with one Sn(1)O6 pentagonal pyramid, corners with three equivalent Cr(1)O6 pentagonal pyramids, edges with two equivalent Li(1)O6 octahedra, and  an edgeedge with one Sn(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 54°. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Li(2)O6 octahedra,  a cornercorner with one Cr(1)O6 pentagonal pyramid, corners with three equivalent Sn(1)O6 pentagonal pyramids, edges with two equivalent Li(2)O6 octahedra, and  an edgeedge with one Cr(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 58°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(1), one Cr(1), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Li(1), one Sn(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Cr(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(2), one Cr(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Li(2), one Cr(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li(2), one Sn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_Li2CrSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.691
_cell_length_b   4.841
_cell_length_c   10.732
_cell_angle_alpha   86.484
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   346.989
_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  0.000  0.000  0.000  1.0
  Li  Li1  1  0.500  0.000  0.000  1.0
  Li  Li2  1  0.000  0.500  0.500  1.0
  Li  Li3  1  0.500  0.500  0.500  1.0
  Cr  Cr4  1  0.250  0.555  0.787  1.0
  Cr  Cr5  1  0.750  0.445  0.213  1.0
  Sn  Sn6  1  0.750  0.041  0.718  1.0
  Sn  Sn7  1  0.250  0.959  0.282  1.0
  P  P8  1  0.750  0.572  0.924  1.0
  P  P9  1  0.250  0.117  0.597  1.0
  P  P10  1  0.750  0.883  0.403  1.0
  P  P11  1  0.250  0.428  0.076  1.0
  O  O12  1  0.250  0.295  0.946  1.0
  O  O13  1  0.750  0.254  0.940  1.0
  O  O14  1  0.938  0.693  0.850  1.0
  O  O15  1  0.562  0.693  0.850  1.0
  O  O16  1  0.435  0.249  0.658  1.0
  O  O17  1  0.065  0.249  0.658  1.0
  O  O18  1  0.250  0.795  0.614  1.0
  O  O19  1  0.750  0.770  0.543  1.0
  O  O20  1  0.250  0.230  0.457  1.0
  O  O21  1  0.750  0.205  0.386  1.0
  O  O22  1  0.935  0.751  0.342  1.0
  O  O23  1  0.565  0.751  0.342  1.0
  O  O24  1  0.438  0.307  0.150  1.0
  O  O25  1  0.062  0.307  0.150  1.0
  O  O26  1  0.250  0.746  0.060  1.0
  O  O27  1  0.750  0.705  0.054  1.0
[/CIF]
.