The structure described by Li2VSi4O11 crystallizes in the tetragonal I4/m space group. Li(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form VO6 octahedra that share corners with two equivalent V(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedra are not tilted. Si(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form SiO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are five inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(1) atoms. In the third O site, O(1) is bonded in a linear geometry to two equivalent V(1) atoms. In the fourth O site, O(2) is bonded in an octahedral geometry to four equivalent Li(1) and two equivalent V(1) atoms. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one V(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_Li2VSi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.451
_cell_length_b   8.451
_cell_length_c   8.451
_cell_angle_alpha   102.343
_cell_angle_beta   102.343
_cell_angle_gamma   124.922
_symmetry_Int_Tables_number   1
_cell_volume   438.761
_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  0.648  0.619  0.267  1.0
  Li  Li1  1  0.381  0.648  0.029  1.0
  Li  Li2  1  0.619  0.352  0.971  1.0
  Li  Li3  1  0.352  0.381  0.733  1.0
  V  V4  1  0.238  0.238  0.000  1.0
  V  V5  1  0.762  0.762  0.000  1.0
  Si  Si6  1  0.499  0.171  0.283  1.0
  Si  Si7  1  0.111  0.784  0.283  1.0
  Si  Si8  1  0.171  0.889  0.673  1.0
  Si  Si9  1  0.784  0.501  0.673  1.0
  Si  Si10  1  0.829  0.111  0.327  1.0
  Si  Si11  1  0.216  0.499  0.327  1.0
  Si  Si12  1  0.501  0.829  0.717  1.0
  Si  Si13  1  0.889  0.216  0.717  1.0
  O  O14  1  0.000  0.000  0.000  1.0
  O  O15  1  0.500  0.500  0.000  1.0
  O  O16  1  0.446  0.204  0.103  1.0
  O  O17  1  0.899  0.657  0.103  1.0
  O  O18  1  0.291  0.033  0.323  1.0
  O  O19  1  0.672  0.406  0.453  1.0
  O  O20  1  0.048  0.781  0.453  1.0
  O  O21  1  0.594  0.048  0.267  1.0
  O  O22  1  0.219  0.672  0.267  1.0
  O  O23  1  0.204  0.101  0.758  1.0
  O  O24  1  0.657  0.554  0.758  1.0
  O  O25  1  0.967  0.291  0.258  1.0
  O  O26  1  0.033  0.709  0.742  1.0
  O  O27  1  0.343  0.446  0.242  1.0
  O  O28  1  0.796  0.899  0.242  1.0
  O  O29  1  0.781  0.328  0.733  1.0
  O  O30  1  0.406  0.952  0.733  1.0
  O  O31  1  0.328  0.594  0.547  1.0
  O  O32  1  0.952  0.219  0.547  1.0
  O  O33  1  0.709  0.967  0.677  1.0
  O  O34  1  0.101  0.343  0.897  1.0
  O  O35  1  0.554  0.796  0.897  1.0
[/CIF]
.
The structure described by Li2VSi4O11 crystallizes in the tetragonal I4/m space group. Li(1) is bonded in a 3-coordinate geometry to one O(2) and two equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form VO6 octahedra that share corners with two equivalent V(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedra are not tilted. Si(1) is bonded to one O(3), one O(4), and two equivalent O(5) atoms to form SiO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. There are five inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent Si(1) atoms. In the second O site, O(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Si(1) atoms. In the third O site, O(1) is bonded in a linear geometry to two equivalent V(1) atoms. In the fourth O site, O(2) is bonded in an octahedral geometry to four equivalent Li(1) and two equivalent V(1) atoms. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one V(1), and one Si(1) atom. is represented by the CIF card [CIF]
data_Li2VSi4O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.451
_cell_length_b   8.451
_cell_length_c   8.451
_cell_angle_alpha   102.343
_cell_angle_beta   102.343
_cell_angle_gamma   124.922
_symmetry_Int_Tables_number   1
_cell_volume   438.761
_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  0.648  0.619  0.267  1.0
  Li  Li1  1  0.381  0.648  0.029  1.0
  Li  Li2  1  0.619  0.352  0.971  1.0
  Li  Li3  1  0.352  0.381  0.733  1.0
  V  V4  1  0.238  0.238  0.000  1.0
  V  V5  1  0.762  0.762  0.000  1.0
  Si  Si6  1  0.499  0.171  0.283  1.0
  Si  Si7  1  0.111  0.784  0.283  1.0
  Si  Si8  1  0.171  0.889  0.673  1.0
  Si  Si9  1  0.784  0.501  0.673  1.0
  Si  Si10  1  0.829  0.111  0.327  1.0
  Si  Si11  1  0.216  0.499  0.327  1.0
  Si  Si12  1  0.501  0.829  0.717  1.0
  Si  Si13  1  0.889  0.216  0.717  1.0
  O  O14  1  0.000  0.000  0.000  1.0
  O  O15  1  0.500  0.500  0.000  1.0
  O  O16  1  0.446  0.204  0.103  1.0
  O  O17  1  0.899  0.657  0.103  1.0
  O  O18  1  0.291  0.033  0.323  1.0
  O  O19  1  0.672  0.406  0.453  1.0
  O  O20  1  0.048  0.781  0.453  1.0
  O  O21  1  0.594  0.048  0.267  1.0
  O  O22  1  0.219  0.672  0.267  1.0
  O  O23  1  0.204  0.101  0.758  1.0
  O  O24  1  0.657  0.554  0.758  1.0
  O  O25  1  0.967  0.291  0.258  1.0
  O  O26  1  0.033  0.709  0.742  1.0
  O  O27  1  0.343  0.446  0.242  1.0
  O  O28  1  0.796  0.899  0.242  1.0
  O  O29  1  0.781  0.328  0.733  1.0
  O  O30  1  0.406  0.952  0.733  1.0
  O  O31  1  0.328  0.594  0.547  1.0
  O  O32  1  0.952  0.219  0.547  1.0
  O  O33  1  0.709  0.967  0.677  1.0
  O  O34  1  0.101  0.343  0.897  1.0
  O  O35  1  0.554  0.796  0.897  1.0
[/CIF]
.