The compound described by Li5Cr(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 square pyramids that share  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 Cr(1)O6 octahedra. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(14), one O(6), and one O(8) atom. In the third Li site, Li(3) is bonded in a 4-coordinate geometry to one O(13), one O(3), one O(5), and one O(9) atom. In the fourth Li site, Li(4) is bonded in a 5-coordinate geometry to one O(5), one O(8), one O(9), and two equivalent O(13) atoms. In the fifth Li site, Li(5) is bonded in a 4-coordinate geometry to one O(11), one O(12), and two equivalent O(14) atoms. Cr(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(5) atom to form CrO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Li(1)O5 square pyramid. 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 corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one Li(1)O5 square pyramid, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-63°. 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 Cr(1)O6 octahedra, corners with two equivalent Li(1)O5 square pyramids, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-43°. 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 Cr(1)O6 octahedra,  a cornercorner with one Li(1)O5 square pyramid, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. 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 Cr(1)O6 octahedra,  a cornercorner with one Li(1)O5 square pyramid, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(2), one Cr(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Cr(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Li(3) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Cr(1), and one P(2) atom. In the fifth O site, O(5) is bonded to one Li(3), one Li(4), one Cr(1), and one P(1) atom to form a mixture of distorted corner and edge-sharing OLi2CrP tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Li(4), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Li(1), one Li(3), one Li(4), and one P(3) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one P(2) and one P(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Li(5), one Cr(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 Cr(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 OLi3P trigonal pyramids that share  a cornercorner with one O(5)Li2CrP tetrahedra,  an edgeedge with one O(5)Li2CrP tetrahedra, and  an edgeedge with one O(13)Li3P trigonal pyramid. In the fourteenth O site, O(14) is bonded to one Li(2), two equivalent Li(5), and one P(4) atom to form distorted edge-sharing OLi3P trigonal pyramids. is represented by the CIF card [CIF]
data_Li5Cr(P2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.989
_cell_length_b   8.774
_cell_length_c   9.240
_cell_angle_alpha   81.168
_cell_angle_beta   79.096
_cell_angle_gamma   69.581
_symmetry_Int_Tables_number   1
_cell_volume   519.075
_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  0.319  0.172  0.263  1.0
  Li  Li1  1  0.256  0.255  0.569  1.0
  Li  Li2  1  0.752  0.279  0.090  1.0
  Li  Li3  1  0.053  0.520  0.143  1.0
  Li  Li4  1  0.426  0.502  0.337  1.0
  Li  Li5  1  0.574  0.498  0.663  1.0
  Li  Li6  1  0.947  0.480  0.857  1.0
  Li  Li7  1  0.248  0.721  0.910  1.0
  Li  Li8  1  0.744  0.745  0.431  1.0
  Li  Li9  1  0.681  0.828  0.737  1.0
  Cr  Cr10  1  0.870  0.143  0.746  1.0
  Cr  Cr11  1  0.130  0.857  0.254  1.0
  P  P12  1  0.181  0.096  0.966  1.0
  P  P13  1  0.707  0.100  0.448  1.0
  P  P14  1  0.402  0.339  0.949  1.0
  P  P15  1  0.866  0.379  0.430  1.0
  P  P16  1  0.134  0.621  0.570  1.0
  P  P17  1  0.598  0.661  0.051  1.0
  P  P18  1  0.293  0.900  0.552  1.0
  P  P19  1  0.819  0.904  0.034  1.0
  O  O20  1  0.156  0.054  0.627  1.0
  O  O21  1  0.137  0.080  0.137  1.0
  O  O22  1  0.746  0.064  0.097  1.0
  O  O23  1  0.725  0.075  0.615  1.0
  O  O24  1  0.996  0.226  0.893  1.0
  O  O25  1  0.486  0.162  0.420  1.0
  O  O26  1  0.363  0.174  0.921  1.0
  O  O27  1  0.074  0.371  0.341  1.0
  O  O28  1  0.427  0.334  0.110  1.0
  O  O29  1  0.802  0.242  0.369  1.0
  O  O30  1  0.601  0.324  0.836  1.0
  O  O31  1  0.872  0.336  0.599  1.0
  O  O32  1  0.215  0.488  0.913  1.0
  O  O33  1  0.311  0.460  0.588  1.0
  O  O34  1  0.689  0.540  0.412  1.0
  O  O35  1  0.785  0.512  0.087  1.0
  O  O36  1  0.128  0.664  0.401  1.0
  O  O37  1  0.399  0.676  0.164  1.0
  O  O38  1  0.198  0.758  0.631  1.0
  O  O39  1  0.573  0.666  0.890  1.0
  O  O40  1  0.926  0.629  0.659  1.0
  O  O41  1  0.637  0.826  0.079  1.0
  O  O42  1  0.514  0.838  0.580  1.0
  O  O43  1  0.004  0.774  0.107  1.0
  O  O44  1  0.275  0.925  0.385  1.0
  O  O45  1  0.254  0.936  0.903  1.0
  O  O46  1  0.863  0.920  0.863  1.0
  O  O47  1  0.844  0.946  0.373  1.0
[/CIF]
.
The compound described by Li5Cr(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 square pyramids that share  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 Cr(1)O6 octahedra. In the second Li site, Li(2) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(14), one O(6), and one O(8) atom. In the third Li site, Li(3) is bonded in a 4-coordinate geometry to one O(13), one O(3), one O(5), and one O(9) atom. In the fourth Li site, Li(4) is bonded in a 5-coordinate geometry to one O(5), one O(8), one O(9), and two equivalent O(13) atoms. In the fifth Li site, Li(5) is bonded in a 4-coordinate geometry to one O(11), one O(12), and two equivalent O(14) atoms. Cr(1) is bonded to one O(1), one O(11), one O(12), one O(2), one O(4), and one O(5) atom to form CrO6 octahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Li(1)O5 square pyramid. 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 corners with two equivalent Cr(1)O6 octahedra,  a cornercorner with one Li(1)O5 square pyramid, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 60-63°. 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 Cr(1)O6 octahedra, corners with two equivalent Li(1)O5 square pyramids, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-43°. 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 Cr(1)O6 octahedra,  a cornercorner with one Li(1)O5 square pyramid, and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 40°. 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 Cr(1)O6 octahedra,  a cornercorner with one Li(1)O5 square pyramid, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(2), one Cr(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Cr(1), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Li(3) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Cr(1), and one P(2) atom. In the fifth O site, O(5) is bonded to one Li(3), one Li(4), one Cr(1), and one P(1) atom to form a mixture of distorted corner and edge-sharing OLi2CrP tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(1), one Li(2), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Li(4), and one P(4) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Li(1), one Li(3), one Li(4), and one P(3) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one P(2) and one P(4) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Li(5), one Cr(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 Cr(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 OLi3P trigonal pyramids that share  a cornercorner with one O(5)Li2CrP tetrahedra,  an edgeedge with one O(5)Li2CrP tetrahedra, and  an edgeedge with one O(13)Li3P trigonal pyramid. In the fourteenth O site, O(14) is bonded to one Li(2), two equivalent Li(5), and one P(4) atom to form distorted edge-sharing OLi3P trigonal pyramids. is represented by the CIF card [CIF]
data_Li5Cr(P2O7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.989
_cell_length_b   8.774
_cell_length_c   9.240
_cell_angle_alpha   81.168
_cell_angle_beta   79.096
_cell_angle_gamma   69.581
_symmetry_Int_Tables_number   1
_cell_volume   519.075
_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  0.319  0.172  0.263  1.0
  Li  Li1  1  0.256  0.255  0.569  1.0
  Li  Li2  1  0.752  0.279  0.090  1.0
  Li  Li3  1  0.053  0.520  0.143  1.0
  Li  Li4  1  0.426  0.502  0.337  1.0
  Li  Li5  1  0.574  0.498  0.663  1.0
  Li  Li6  1  0.947  0.480  0.857  1.0
  Li  Li7  1  0.248  0.721  0.910  1.0
  Li  Li8  1  0.744  0.745  0.431  1.0
  Li  Li9  1  0.681  0.828  0.737  1.0
  Cr  Cr10  1  0.870  0.143  0.746  1.0
  Cr  Cr11  1  0.130  0.857  0.254  1.0
  P  P12  1  0.181  0.096  0.966  1.0
  P  P13  1  0.707  0.100  0.448  1.0
  P  P14  1  0.402  0.339  0.949  1.0
  P  P15  1  0.866  0.379  0.430  1.0
  P  P16  1  0.134  0.621  0.570  1.0
  P  P17  1  0.598  0.661  0.051  1.0
  P  P18  1  0.293  0.900  0.552  1.0
  P  P19  1  0.819  0.904  0.034  1.0
  O  O20  1  0.156  0.054  0.627  1.0
  O  O21  1  0.137  0.080  0.137  1.0
  O  O22  1  0.746  0.064  0.097  1.0
  O  O23  1  0.725  0.075  0.615  1.0
  O  O24  1  0.996  0.226  0.893  1.0
  O  O25  1  0.486  0.162  0.420  1.0
  O  O26  1  0.363  0.174  0.921  1.0
  O  O27  1  0.074  0.371  0.341  1.0
  O  O28  1  0.427  0.334  0.110  1.0
  O  O29  1  0.802  0.242  0.369  1.0
  O  O30  1  0.601  0.324  0.836  1.0
  O  O31  1  0.872  0.336  0.599  1.0
  O  O32  1  0.215  0.488  0.913  1.0
  O  O33  1  0.311  0.460  0.588  1.0
  O  O34  1  0.689  0.540  0.412  1.0
  O  O35  1  0.785  0.512  0.087  1.0
  O  O36  1  0.128  0.664  0.401  1.0
  O  O37  1  0.399  0.676  0.164  1.0
  O  O38  1  0.198  0.758  0.631  1.0
  O  O39  1  0.573  0.666  0.890  1.0
  O  O40  1  0.926  0.629  0.659  1.0
  O  O41  1  0.637  0.826  0.079  1.0
  O  O42  1  0.514  0.838  0.580  1.0
  O  O43  1  0.004  0.774  0.107  1.0
  O  O44  1  0.275  0.925  0.385  1.0
  O  O45  1  0.254  0.936  0.903  1.0
  O  O46  1  0.863  0.920  0.863  1.0
  O  O47  1  0.844  0.946  0.373  1.0
[/CIF]
.