The compound described by Li3V2(SiO5)2 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted LiO5 trigonal bipyramids that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra,  a cornercorner with one V(1)O5 trigonal bipyramid, edges with two equivalent Li(2)O6 octahedra, and edges with two equivalent V(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 72°. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted LiO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid,  an edgeedge with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one V(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 47-48°. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted VO5 trigonal bipyramids that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, edges with two equivalent Li(2)O6 octahedra, and edges with two equivalent Li(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 64°. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(6), two equivalent O(4), and two equivalent O(5) atoms. Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four equivalent Li(2)O6 octahedra, corners with two equivalent Li(1)O5 trigonal bipyramids, and corners with two equivalent V(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 60-64°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), two equivalent Li(2), and one V(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one V(1), and one Si(1) atom to form distorted edge-sharing OLi2VSi tetrahedra. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(2), one V(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(2), one V(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(2), one V(2), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Li(2) and one V(2) atom. is represented by the CIF file [CIF]
data_Li3V2(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.554
_cell_length_b   8.996
_cell_length_c   9.288
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   380.542
_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  0.616  0.000  0.005  1.0
  Li  Li1  1  0.384  0.000  0.505  1.0
  Li  Li2  1  0.001  0.254  0.003  1.0
  Li  Li3  1  0.999  0.254  0.503  1.0
  Li  Li4  1  0.001  0.746  0.003  1.0
  Li  Li5  1  0.999  0.746  0.503  1.0
  V  V6  1  0.957  0.000  0.291  1.0
  V  V7  1  0.043  0.000  0.791  1.0
  V  V8  1  0.576  0.500  0.496  1.0
  V  V9  1  0.424  0.500  0.996  1.0
  Si  Si10  1  0.500  0.251  0.248  1.0
  Si  Si11  1  0.500  0.251  0.748  1.0
  Si  Si12  1  0.500  0.749  0.748  1.0
  Si  Si13  1  0.500  0.749  0.248  1.0
  O  O14  1  0.803  0.000  0.455  1.0
  O  O15  1  0.197  0.000  0.955  1.0
  O  O16  1  0.744  0.146  0.165  1.0
  O  O17  1  0.256  0.146  0.665  1.0
  O  O18  1  0.260  0.150  0.336  1.0
  O  O19  1  0.740  0.150  0.836  1.0
  O  O20  1  0.317  0.352  0.132  1.0
  O  O21  1  0.683  0.352  0.632  1.0
  O  O22  1  0.688  0.353  0.362  1.0
  O  O23  1  0.312  0.353  0.862  1.0
  O  O24  1  0.217  0.500  0.496  1.0
  O  O25  1  0.783  0.500  0.996  1.0
  O  O26  1  0.688  0.647  0.362  1.0
  O  O27  1  0.312  0.647  0.862  1.0
  O  O28  1  0.317  0.648  0.132  1.0
  O  O29  1  0.683  0.648  0.632  1.0
  O  O30  1  0.260  0.850  0.336  1.0
  O  O31  1  0.740  0.850  0.836  1.0
  O  O32  1  0.256  0.854  0.665  1.0
  O  O33  1  0.744  0.854  0.165  1.0
[/CIF]
.
The compound described by Li3V2(SiO5)2 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted LiO5 trigonal bipyramids that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra,  a cornercorner with one V(1)O5 trigonal bipyramid, edges with two equivalent Li(2)O6 octahedra, and edges with two equivalent V(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 72°. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form distorted LiO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid,  an edgeedge with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one V(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 47-48°. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted VO5 trigonal bipyramids that share corners with two equivalent Li(2)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, edges with two equivalent Li(2)O6 octahedra, and edges with two equivalent Li(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 64°. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(6), two equivalent O(4), and two equivalent O(5) atoms. Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four equivalent Li(2)O6 octahedra, corners with two equivalent Li(1)O5 trigonal bipyramids, and corners with two equivalent V(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 60-64°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), two equivalent Li(2), and one V(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one V(1), and one Si(1) atom to form distorted edge-sharing OLi2VSi tetrahedra. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Li(2), one V(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(2), one V(2), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(2), one V(2), and one Si(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Li(2) and one V(2) atom. is represented by the CIF file [CIF]
data_Li3V2(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.554
_cell_length_b   8.996
_cell_length_c   9.288
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   380.542
_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  0.616  0.000  0.005  1.0
  Li  Li1  1  0.384  0.000  0.505  1.0
  Li  Li2  1  0.001  0.254  0.003  1.0
  Li  Li3  1  0.999  0.254  0.503  1.0
  Li  Li4  1  0.001  0.746  0.003  1.0
  Li  Li5  1  0.999  0.746  0.503  1.0
  V  V6  1  0.957  0.000  0.291  1.0
  V  V7  1  0.043  0.000  0.791  1.0
  V  V8  1  0.576  0.500  0.496  1.0
  V  V9  1  0.424  0.500  0.996  1.0
  Si  Si10  1  0.500  0.251  0.248  1.0
  Si  Si11  1  0.500  0.251  0.748  1.0
  Si  Si12  1  0.500  0.749  0.748  1.0
  Si  Si13  1  0.500  0.749  0.248  1.0
  O  O14  1  0.803  0.000  0.455  1.0
  O  O15  1  0.197  0.000  0.955  1.0
  O  O16  1  0.744  0.146  0.165  1.0
  O  O17  1  0.256  0.146  0.665  1.0
  O  O18  1  0.260  0.150  0.336  1.0
  O  O19  1  0.740  0.150  0.836  1.0
  O  O20  1  0.317  0.352  0.132  1.0
  O  O21  1  0.683  0.352  0.632  1.0
  O  O22  1  0.688  0.353  0.362  1.0
  O  O23  1  0.312  0.353  0.862  1.0
  O  O24  1  0.217  0.500  0.496  1.0
  O  O25  1  0.783  0.500  0.996  1.0
  O  O26  1  0.688  0.647  0.362  1.0
  O  O27  1  0.312  0.647  0.862  1.0
  O  O28  1  0.317  0.648  0.132  1.0
  O  O29  1  0.683  0.648  0.632  1.0
  O  O30  1  0.260  0.850  0.336  1.0
  O  O31  1  0.740  0.850  0.836  1.0
  O  O32  1  0.256  0.854  0.665  1.0
  O  O33  1  0.744  0.854  0.165  1.0
[/CIF]
.