The structure described by Li5V(P2O7)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one V(1)O7 pentagonal bipyramid. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(14), and one O(6) atom. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(10), one O(13), one O(2), one O(3), and one O(9) atom. In the fourth Li site, Li(4) is bonded to one O(5), one O(8), and two equivalent O(13) atoms to form LiO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one Li(4)O4 tetrahedra. In the fifth Li site, Li(5) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(6), and two equivalent O(14) atoms. V(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(3), one O(4), and one O(5) atom to form distorted VO7 pentagonal bipyramids that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one V(1)O7 pentagonal bipyramid. In the second P site, P(2) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent V(1)O7 pentagonal bipyramids,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Li(1)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(11), one O(13), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and  a cornercorner with one Li(1)O5 trigonal bipyramid. In the fourth P site, P(4) is bonded to one O(10), one O(12), one O(14), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one Li(1)O5 trigonal bipyramid. There are fourteen 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 4-coordinate geometry to one Li(1), one Li(3), one V(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(3), one V(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(1), one V(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(4), one V(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Li(5), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(4), and one P(4) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(3), and one P(3) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Li(3), one Li(5), one P(2), and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Li(5), one V(1), and one P(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Li(2), one Li(5), one V(1), and one P(4) atom. In the thirteenth O site, O(13) is bonded to one Li(3), two equivalent Li(4), and one P(3) atom to form distorted edge-sharing OLi3P trigonal pyramids. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Li(2), two equivalent Li(5), and one P(4) atom. is represented by the CIF file [CIF]
data_Li5V(P2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.086
_cell_length_b   8.827
_cell_length_c   9.141
_cell_angle_alpha   76.963
_cell_angle_beta   77.470
_cell_angle_gamma   69.683
_symmetry_Int_Tables_number   1
_cell_volume   516.321
_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  0.306  0.184  0.278  1.0
  Li  Li1  1  0.233  0.244  0.593  1.0
  Li  Li2  1  0.758  0.259  0.116  1.0
  Li  Li3  1  0.036  0.525  0.135  1.0
  Li  Li4  1  0.417  0.478  0.350  1.0
  Li  Li5  1  0.583  0.522  0.650  1.0
  Li  Li6  1  0.964  0.475  0.865  1.0
  Li  Li7  1  0.242  0.741  0.884  1.0
  Li  Li8  1  0.767  0.756  0.407  1.0
  Li  Li9  1  0.694  0.816  0.722  1.0
  V  V10  1  0.871  0.125  0.764  1.0
  V  V11  1  0.129  0.875  0.236  1.0
  P  P12  1  0.169  0.119  0.983  1.0
  P  P13  1  0.694  0.109  0.451  1.0
  P  P14  1  0.414  0.338  0.951  1.0
  P  P15  1  0.868  0.383  0.429  1.0
  P  P16  1  0.132  0.617  0.571  1.0
  P  P17  1  0.586  0.662  0.049  1.0
  P  P18  1  0.306  0.891  0.549  1.0
  P  P19  1  0.831  0.881  0.017  1.0
  O  O20  1  0.175  0.021  0.650  1.0
  O  O21  1  0.079  0.141  0.149  1.0
  O  O22  1  0.777  0.066  0.010  1.0
  O  O23  1  0.732  0.061  0.617  1.0
  O  O24  1  0.030  0.229  0.866  1.0
  O  O25  1  0.471  0.169  0.433  1.0
  O  O26  1  0.370  0.171  0.933  1.0
  O  O27  1  0.068  0.378  0.327  1.0
  O  O28  1  0.461  0.312  0.112  1.0
  O  O29  1  0.766  0.271  0.372  1.0
  O  O30  1  0.595  0.338  0.823  1.0
  O  O31  1  0.904  0.308  0.594  1.0
  O  O32  1  0.219  0.484  0.928  1.0
  O  O33  1  0.296  0.451  0.575  1.0
  O  O34  1  0.704  0.549  0.425  1.0
  O  O35  1  0.781  0.516  0.072  1.0
  O  O36  1  0.096  0.692  0.406  1.0
  O  O37  1  0.405  0.662  0.177  1.0
  O  O38  1  0.234  0.729  0.628  1.0
  O  O39  1  0.539  0.688  0.888  1.0
  O  O40  1  0.932  0.622  0.673  1.0
  O  O41  1  0.630  0.829  0.067  1.0
  O  O42  1  0.529  0.831  0.567  1.0
  O  O43  1  0.970  0.771  0.134  1.0
  O  O44  1  0.268  0.939  0.383  1.0
  O  O45  1  0.223  0.934  0.990  1.0
  O  O46  1  0.921  0.859  0.851  1.0
  O  O47  1  0.825  0.979  0.350  1.0
[/CIF]
.
The structure described by Li5V(P2O7)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one V(1)O7 pentagonal bipyramid. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(14), and one O(6) atom. In the third Li site, Li(3) is bonded in a 5-coordinate geometry to one O(10), one O(13), one O(2), one O(3), and one O(9) atom. In the fourth Li site, Li(4) is bonded to one O(5), one O(8), and two equivalent O(13) atoms to form LiO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one Li(4)O4 tetrahedra. In the fifth Li site, Li(5) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(6), and two equivalent O(14) atoms. V(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(3), one O(4), and one O(5) atom to form distorted VO7 pentagonal bipyramids that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one V(1)O7 pentagonal bipyramid. In the second P site, P(2) is bonded to one O(1), one O(10), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent V(1)O7 pentagonal bipyramids,  a cornercorner with one P(4)O4 tetrahedra, and corners with two equivalent Li(1)O5 trigonal bipyramids. In the third P site, P(3) is bonded to one O(11), one O(13), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, and  a cornercorner with one Li(1)O5 trigonal bipyramid. In the fourth P site, P(4) is bonded to one O(10), one O(12), one O(14), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one V(1)O7 pentagonal bipyramid,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one Li(1)O5 trigonal bipyramid. There are fourteen 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 4-coordinate geometry to one Li(1), one Li(3), one V(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(3), one V(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(1), one V(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(4), one V(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Li(5), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one P(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(4), and one P(4) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to one Li(1), one Li(3), and one P(3) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Li(3), one Li(5), one P(2), and one P(4) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Li(5), one V(1), and one P(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Li(2), one Li(5), one V(1), and one P(4) atom. In the thirteenth O site, O(13) is bonded to one Li(3), two equivalent Li(4), and one P(3) atom to form distorted edge-sharing OLi3P trigonal pyramids. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Li(2), two equivalent Li(5), and one P(4) atom. is represented by the CIF file [CIF]
data_Li5V(P2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.086
_cell_length_b   8.827
_cell_length_c   9.141
_cell_angle_alpha   76.963
_cell_angle_beta   77.470
_cell_angle_gamma   69.683
_symmetry_Int_Tables_number   1
_cell_volume   516.321
_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  0.306  0.184  0.278  1.0
  Li  Li1  1  0.233  0.244  0.593  1.0
  Li  Li2  1  0.758  0.259  0.116  1.0
  Li  Li3  1  0.036  0.525  0.135  1.0
  Li  Li4  1  0.417  0.478  0.350  1.0
  Li  Li5  1  0.583  0.522  0.650  1.0
  Li  Li6  1  0.964  0.475  0.865  1.0
  Li  Li7  1  0.242  0.741  0.884  1.0
  Li  Li8  1  0.767  0.756  0.407  1.0
  Li  Li9  1  0.694  0.816  0.722  1.0
  V  V10  1  0.871  0.125  0.764  1.0
  V  V11  1  0.129  0.875  0.236  1.0
  P  P12  1  0.169  0.119  0.983  1.0
  P  P13  1  0.694  0.109  0.451  1.0
  P  P14  1  0.414  0.338  0.951  1.0
  P  P15  1  0.868  0.383  0.429  1.0
  P  P16  1  0.132  0.617  0.571  1.0
  P  P17  1  0.586  0.662  0.049  1.0
  P  P18  1  0.306  0.891  0.549  1.0
  P  P19  1  0.831  0.881  0.017  1.0
  O  O20  1  0.175  0.021  0.650  1.0
  O  O21  1  0.079  0.141  0.149  1.0
  O  O22  1  0.777  0.066  0.010  1.0
  O  O23  1  0.732  0.061  0.617  1.0
  O  O24  1  0.030  0.229  0.866  1.0
  O  O25  1  0.471  0.169  0.433  1.0
  O  O26  1  0.370  0.171  0.933  1.0
  O  O27  1  0.068  0.378  0.327  1.0
  O  O28  1  0.461  0.312  0.112  1.0
  O  O29  1  0.766  0.271  0.372  1.0
  O  O30  1  0.595  0.338  0.823  1.0
  O  O31  1  0.904  0.308  0.594  1.0
  O  O32  1  0.219  0.484  0.928  1.0
  O  O33  1  0.296  0.451  0.575  1.0
  O  O34  1  0.704  0.549  0.425  1.0
  O  O35  1  0.781  0.516  0.072  1.0
  O  O36  1  0.096  0.692  0.406  1.0
  O  O37  1  0.405  0.662  0.177  1.0
  O  O38  1  0.234  0.729  0.628  1.0
  O  O39  1  0.539  0.688  0.888  1.0
  O  O40  1  0.932  0.622  0.673  1.0
  O  O41  1  0.630  0.829  0.067  1.0
  O  O42  1  0.529  0.831  0.567  1.0
  O  O43  1  0.970  0.771  0.134  1.0
  O  O44  1  0.268  0.939  0.383  1.0
  O  O45  1  0.223  0.934  0.990  1.0
  O  O46  1  0.921  0.859  0.851  1.0
  O  O47  1  0.825  0.979  0.350  1.0
[/CIF]
.