The material described by Li2VOP2O7 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 2-coordinate geometry to one O(2), one O(3), and one O(4) atom. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(6), and one O(7) atom. V(1) is bonded to one O(1), one O(4), one O(5), one O(6), and one O(7) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(2), one V(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Li(1) and one P(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one V(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(2), one V(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(2), one V(1), and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Li(2) and one V(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2V(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.879
_cell_length_b   8.948
_cell_length_c   10.860
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   668.473
_cell_formula_units_Z   4
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  0.229  0.262  0.009  1.0
  Li  Li1  1  0.372  0.908  0.896  1.0
  Li  Li2  1  0.128  0.092  0.396  1.0
  Li  Li3  1  0.271  0.738  0.509  1.0
  Li  Li4  1  0.729  0.238  0.991  1.0
  Li  Li5  1  0.872  0.592  0.104  1.0
  Li  Li6  1  0.628  0.408  0.604  1.0
  Li  Li7  1  0.771  0.762  0.491  1.0
  V  V8  1  0.256  0.224  0.684  1.0
  V  V9  1  0.244  0.776  0.184  1.0
  V  V10  1  0.756  0.276  0.316  1.0
  V  V11  1  0.744  0.724  0.816  1.0
  P  P12  1  0.970  0.437  0.853  1.0
  P  P13  1  0.127  0.495  0.336  1.0
  P  P14  1  0.373  0.505  0.836  1.0
  P  P15  1  0.530  0.563  0.353  1.0
  P  P16  1  0.470  0.063  0.147  1.0
  P  P17  1  0.627  0.005  0.664  1.0
  P  P18  1  0.873  0.995  0.164  1.0
  P  P19  1  0.030  0.937  0.647  1.0
  O  O20  1  0.972  0.842  0.178  1.0
  O  O21  1  0.073  0.595  0.442  1.0
  O  O22  1  0.093  0.912  0.514  1.0
  O  O23  1  0.053  0.288  0.803  1.0
  O  O24  1  0.116  0.576  0.209  1.0
  O  O25  1  0.188  0.006  0.731  1.0
  O  O26  1  0.177  0.229  0.543  1.0
  O  O27  1  0.147  0.556  0.851  1.0
  O  O28  1  0.353  0.444  0.351  1.0
  O  O29  1  0.323  0.771  0.043  1.0
  O  O30  1  0.312  0.994  0.231  1.0
  O  O31  1  0.384  0.424  0.709  1.0
  O  O32  1  0.447  0.712  0.303  1.0
  O  O33  1  0.407  0.088  0.014  1.0
  O  O34  1  0.427  0.405  0.942  1.0
  O  O35  1  0.528  0.158  0.678  1.0
  O  O36  1  0.472  0.658  0.822  1.0
  O  O37  1  0.573  0.905  0.558  1.0
  O  O38  1  0.593  0.588  0.486  1.0
  O  O39  1  0.553  0.212  0.197  1.0
  O  O40  1  0.616  0.924  0.791  1.0
  O  O41  1  0.688  0.494  0.269  1.0
  O  O42  1  0.677  0.271  0.457  1.0
  O  O43  1  0.647  0.944  0.149  1.0
  O  O44  1  0.853  0.056  0.649  1.0
  O  O45  1  0.823  0.729  0.957  1.0
  O  O46  1  0.812  0.506  0.769  1.0
  O  O47  1  0.884  0.076  0.291  1.0
  O  O48  1  0.947  0.788  0.697  1.0
  O  O49  1  0.907  0.412  0.986  1.0
  O  O50  1  0.927  0.095  0.058  1.0
  O  O51  1  0.028  0.342  0.322  1.0
[/CIF]
.
The material described by Li2VOP2O7 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 2-coordinate geometry to one O(2), one O(3), and one O(4) atom. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(6), and one O(7) atom. V(1) is bonded to one O(1), one O(4), one O(5), one O(6), and one O(7) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(2), one V(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Li(1) and one P(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one V(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(2), one V(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(2), one V(1), and one P(1) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Li(2) and one V(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li2V(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.879
_cell_length_b   8.948
_cell_length_c   10.860
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   668.473
_cell_formula_units_Z   4
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  0.229  0.262  0.009  1.0
  Li  Li1  1  0.372  0.908  0.896  1.0
  Li  Li2  1  0.128  0.092  0.396  1.0
  Li  Li3  1  0.271  0.738  0.509  1.0
  Li  Li4  1  0.729  0.238  0.991  1.0
  Li  Li5  1  0.872  0.592  0.104  1.0
  Li  Li6  1  0.628  0.408  0.604  1.0
  Li  Li7  1  0.771  0.762  0.491  1.0
  V  V8  1  0.256  0.224  0.684  1.0
  V  V9  1  0.244  0.776  0.184  1.0
  V  V10  1  0.756  0.276  0.316  1.0
  V  V11  1  0.744  0.724  0.816  1.0
  P  P12  1  0.970  0.437  0.853  1.0
  P  P13  1  0.127  0.495  0.336  1.0
  P  P14  1  0.373  0.505  0.836  1.0
  P  P15  1  0.530  0.563  0.353  1.0
  P  P16  1  0.470  0.063  0.147  1.0
  P  P17  1  0.627  0.005  0.664  1.0
  P  P18  1  0.873  0.995  0.164  1.0
  P  P19  1  0.030  0.937  0.647  1.0
  O  O20  1  0.972  0.842  0.178  1.0
  O  O21  1  0.073  0.595  0.442  1.0
  O  O22  1  0.093  0.912  0.514  1.0
  O  O23  1  0.053  0.288  0.803  1.0
  O  O24  1  0.116  0.576  0.209  1.0
  O  O25  1  0.188  0.006  0.731  1.0
  O  O26  1  0.177  0.229  0.543  1.0
  O  O27  1  0.147  0.556  0.851  1.0
  O  O28  1  0.353  0.444  0.351  1.0
  O  O29  1  0.323  0.771  0.043  1.0
  O  O30  1  0.312  0.994  0.231  1.0
  O  O31  1  0.384  0.424  0.709  1.0
  O  O32  1  0.447  0.712  0.303  1.0
  O  O33  1  0.407  0.088  0.014  1.0
  O  O34  1  0.427  0.405  0.942  1.0
  O  O35  1  0.528  0.158  0.678  1.0
  O  O36  1  0.472  0.658  0.822  1.0
  O  O37  1  0.573  0.905  0.558  1.0
  O  O38  1  0.593  0.588  0.486  1.0
  O  O39  1  0.553  0.212  0.197  1.0
  O  O40  1  0.616  0.924  0.791  1.0
  O  O41  1  0.688  0.494  0.269  1.0
  O  O42  1  0.677  0.271  0.457  1.0
  O  O43  1  0.647  0.944  0.149  1.0
  O  O44  1  0.853  0.056  0.649  1.0
  O  O45  1  0.823  0.729  0.957  1.0
  O  O46  1  0.812  0.506  0.769  1.0
  O  O47  1  0.884  0.076  0.291  1.0
  O  O48  1  0.947  0.788  0.697  1.0
  O  O49  1  0.907  0.412  0.986  1.0
  O  O50  1  0.927  0.095  0.058  1.0
  O  O51  1  0.028  0.342  0.322  1.0
[/CIF]
.