The material structure described by Li7Ni(O2F)2 crystallizes in the triclinic P1 space group. There are seven inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(4), and one F(1) atom to form distorted LiO3F trigonal pyramids that share corners with three equivalent Li(4)O3F2 square pyramids, corners with three equivalent Li(5)O3F tetrahedra, corners with four equivalent Li(6)O3F2 trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra, and  an edgeedge with one Li(2)O2F2 trigonal pyramid. In the second Li site, Li(2) is bonded to one O(1), one O(3), one F(1), and one F(2) atom to form distorted LiO2F2 trigonal pyramids that share corners with two equivalent Li(4)O3F2 square pyramids, corners with three equivalent Li(3)O3F tetrahedra,  a cornercorner with one Li(6)O3F2 trigonal pyramid,  an edgeedge with one Li(4)O3F2 square pyramid,  an edgeedge with one Li(5)O3F tetrahedra,  an edgeedge with one Li(1)O3F trigonal pyramid, and  an edgeedge with one Li(6)O3F2 trigonal pyramid. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(3), and one F(2) atom to form LiO3F tetrahedra that share  a cornercorner with one Li(4)O3F2 square pyramid,  a cornercorner with one Li(6)O3F2 trigonal pyramid, corners with three equivalent Li(2)O2F2 trigonal pyramids,  an edgeedge with one Li(4)O3F2 square pyramid,  an edgeedge with one Li(5)O3F tetrahedra,  an edgeedge with one Li(1)O3F trigonal pyramid, and  an edgeedge with one Li(6)O3F2 trigonal pyramid. In the fourth Li site, Li(4) is bonded to one O(1), one O(3), one O(4), one F(1), and one F(2) atom to form distorted LiO3F2 square pyramids that share  a cornercorner with one Li(3)O3F tetrahedra, corners with three equivalent Li(5)O3F tetrahedra,  a cornercorner with one Li(6)O3F2 trigonal pyramid, corners with two equivalent Li(2)O2F2 trigonal pyramids, corners with three equivalent Li(1)O3F trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra,  an edgeedge with one Li(2)O2F2 trigonal pyramid, and  a faceface with one Li(6)O3F2 trigonal pyramid. In the fifth Li site, Li(5) is bonded to one O(2), one O(3), one O(4), and one F(1) atom to form distorted LiO3F tetrahedra that share corners with three equivalent Li(4)O3F2 square pyramids, corners with three equivalent Li(1)O3F trigonal pyramids, corners with three equivalent Li(6)O3F2 trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra, and  an edgeedge with one Li(2)O2F2 trigonal pyramid. In the sixth Li site, Li(6) is bonded to one O(1), one O(2), one O(4), one F(1), and one F(2) atom to form distorted LiO3F2 trigonal pyramids that share  a cornercorner with one Li(4)O3F2 square pyramid,  a cornercorner with one Li(3)O3F tetrahedra, corners with three equivalent Li(5)O3F tetrahedra,  a cornercorner with one Li(2)O2F2 trigonal pyramid, corners with four equivalent Li(1)O3F trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra,  an edgeedge with one Li(2)O2F2 trigonal pyramid, and  a faceface with one Li(4)O3F2 square pyramid. In the seventh Li site, Li(7) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(4), and one F(2) atom. Ni(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to one Li(1), one Li(2), one Li(3), one Li(4), one Li(6), one Li(7), and one Ni(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Li(1), one Li(3), one Li(5), one Li(6), and one Ni(1) atom. In the third O site, O(3) is bonded to one Li(2), one Li(3), one Li(4), one Li(5), one Li(7), and one Ni(1) atom to form distorted OLi5Ni pentagonal pyramids that share  a cornercorner with one F(1)Li5 trigonal bipyramid, corners with two equivalent F(2)Li5 trigonal bipyramids, edges with two equivalent O(4)Li5Ni pentagonal pyramids,  an edgeedge with one F(1)Li5 trigonal bipyramid, and  an edgeedge with one F(2)Li5 trigonal bipyramid. In the fourth O site, O(4) is bonded to one Li(1), one Li(4), one Li(5), one Li(6), one Li(7), and one Ni(1) atom to form distorted OLi5Ni pentagonal pyramids that share  a cornercorner with one F(2)Li5 trigonal bipyramid, corners with two equivalent F(1)Li5 trigonal bipyramids, edges with two equivalent O(3)Li5Ni pentagonal pyramids,  an edgeedge with one F(1)Li5 trigonal bipyramid, and  an edgeedge with one F(2)Li5 trigonal bipyramid. There are two inequivalent F sites. In the first F site, F(1) is bonded to one Li(1), one Li(2), one Li(4), one Li(5), and one Li(6) atom to form distorted FLi5 trigonal bipyramids that share  a cornercorner with one O(3)Li5Ni pentagonal pyramid, corners with two equivalent O(4)Li5Ni pentagonal pyramids,  a cornercorner with one F(2)Li5 trigonal bipyramid,  an edgeedge with one O(3)Li5Ni pentagonal pyramid,  an edgeedge with one O(4)Li5Ni pentagonal pyramid, and  an edgeedge with one F(2)Li5 trigonal bipyramid. In the second F site, F(2) is bonded to one Li(2), one Li(3), one Li(4), one Li(6), and one Li(7) atom to form distorted FLi5 trigonal bipyramids that share  a cornercorner with one O(4)Li5Ni pentagonal pyramid, corners with two equivalent O(3)Li5Ni pentagonal pyramids,  a cornercorner with one F(1)Li5 trigonal bipyramid,  an edgeedge with one O(3)Li5Ni pentagonal pyramid,  an edgeedge with one O(4)Li5Ni pentagonal pyramid, and  an edgeedge with one F(1)Li5 trigonal bipyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li7Ni(O2F)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.465
_cell_length_b   5.471
_cell_length_c   5.577
_cell_angle_alpha   117.694
_cell_angle_beta   91.443
_cell_angle_gamma   112.238
_symmetry_Int_Tables_number   1
_cell_volume   132.492
_cell_formula_units_Z   1
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
  F  F0  1  0.545  0.467  0.717  1.0
  F  F1  1  0.443  0.576  0.287  1.0
  Li  Li2  1  0.882  0.400  0.675  1.0
  Li  Li3  1  0.482  0.253  0.306  1.0
  Li  Li4  1  0.801  0.878  0.362  1.0
  Li  Li5  1  0.362  0.711  0.030  1.0
  Li  Li6  1  0.239  0.105  0.645  1.0
  Li  Li7  1  0.541  0.842  0.711  1.0
  Li  Li8  1  0.057  0.533  0.306  1.0
  Ni  Ni9  1  0.994  0.977  0.992  1.0
  O  O10  1  0.768  0.125  0.226  1.0
  O  O11  1  0.920  0.123  0.775  1.0
  O  O12  1  0.123  0.885  0.235  1.0
  O  O13  1  0.182  0.789  0.742  1.0
[/CIF]
.
The material structure described by Li7Ni(O2F)2 crystallizes in the triclinic P1 space group. There are seven inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(2), one O(4), and one F(1) atom to form distorted LiO3F trigonal pyramids that share corners with three equivalent Li(4)O3F2 square pyramids, corners with three equivalent Li(5)O3F tetrahedra, corners with four equivalent Li(6)O3F2 trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra, and  an edgeedge with one Li(2)O2F2 trigonal pyramid. In the second Li site, Li(2) is bonded to one O(1), one O(3), one F(1), and one F(2) atom to form distorted LiO2F2 trigonal pyramids that share corners with two equivalent Li(4)O3F2 square pyramids, corners with three equivalent Li(3)O3F tetrahedra,  a cornercorner with one Li(6)O3F2 trigonal pyramid,  an edgeedge with one Li(4)O3F2 square pyramid,  an edgeedge with one Li(5)O3F tetrahedra,  an edgeedge with one Li(1)O3F trigonal pyramid, and  an edgeedge with one Li(6)O3F2 trigonal pyramid. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(3), and one F(2) atom to form LiO3F tetrahedra that share  a cornercorner with one Li(4)O3F2 square pyramid,  a cornercorner with one Li(6)O3F2 trigonal pyramid, corners with three equivalent Li(2)O2F2 trigonal pyramids,  an edgeedge with one Li(4)O3F2 square pyramid,  an edgeedge with one Li(5)O3F tetrahedra,  an edgeedge with one Li(1)O3F trigonal pyramid, and  an edgeedge with one Li(6)O3F2 trigonal pyramid. In the fourth Li site, Li(4) is bonded to one O(1), one O(3), one O(4), one F(1), and one F(2) atom to form distorted LiO3F2 square pyramids that share  a cornercorner with one Li(3)O3F tetrahedra, corners with three equivalent Li(5)O3F tetrahedra,  a cornercorner with one Li(6)O3F2 trigonal pyramid, corners with two equivalent Li(2)O2F2 trigonal pyramids, corners with three equivalent Li(1)O3F trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra,  an edgeedge with one Li(2)O2F2 trigonal pyramid, and  a faceface with one Li(6)O3F2 trigonal pyramid. In the fifth Li site, Li(5) is bonded to one O(2), one O(3), one O(4), and one F(1) atom to form distorted LiO3F tetrahedra that share corners with three equivalent Li(4)O3F2 square pyramids, corners with three equivalent Li(1)O3F trigonal pyramids, corners with three equivalent Li(6)O3F2 trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra, and  an edgeedge with one Li(2)O2F2 trigonal pyramid. In the sixth Li site, Li(6) is bonded to one O(1), one O(2), one O(4), one F(1), and one F(2) atom to form distorted LiO3F2 trigonal pyramids that share  a cornercorner with one Li(4)O3F2 square pyramid,  a cornercorner with one Li(3)O3F tetrahedra, corners with three equivalent Li(5)O3F tetrahedra,  a cornercorner with one Li(2)O2F2 trigonal pyramid, corners with four equivalent Li(1)O3F trigonal pyramids,  an edgeedge with one Li(3)O3F tetrahedra,  an edgeedge with one Li(2)O2F2 trigonal pyramid, and  a faceface with one Li(4)O3F2 square pyramid. In the seventh Li site, Li(7) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(4), and one F(2) atom. Ni(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 7-coordinate geometry to one Li(1), one Li(2), one Li(3), one Li(4), one Li(6), one Li(7), and one Ni(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Li(1), one Li(3), one Li(5), one Li(6), and one Ni(1) atom. In the third O site, O(3) is bonded to one Li(2), one Li(3), one Li(4), one Li(5), one Li(7), and one Ni(1) atom to form distorted OLi5Ni pentagonal pyramids that share  a cornercorner with one F(1)Li5 trigonal bipyramid, corners with two equivalent F(2)Li5 trigonal bipyramids, edges with two equivalent O(4)Li5Ni pentagonal pyramids,  an edgeedge with one F(1)Li5 trigonal bipyramid, and  an edgeedge with one F(2)Li5 trigonal bipyramid. In the fourth O site, O(4) is bonded to one Li(1), one Li(4), one Li(5), one Li(6), one Li(7), and one Ni(1) atom to form distorted OLi5Ni pentagonal pyramids that share  a cornercorner with one F(2)Li5 trigonal bipyramid, corners with two equivalent F(1)Li5 trigonal bipyramids, edges with two equivalent O(3)Li5Ni pentagonal pyramids,  an edgeedge with one F(1)Li5 trigonal bipyramid, and  an edgeedge with one F(2)Li5 trigonal bipyramid. There are two inequivalent F sites. In the first F site, F(1) is bonded to one Li(1), one Li(2), one Li(4), one Li(5), and one Li(6) atom to form distorted FLi5 trigonal bipyramids that share  a cornercorner with one O(3)Li5Ni pentagonal pyramid, corners with two equivalent O(4)Li5Ni pentagonal pyramids,  a cornercorner with one F(2)Li5 trigonal bipyramid,  an edgeedge with one O(3)Li5Ni pentagonal pyramid,  an edgeedge with one O(4)Li5Ni pentagonal pyramid, and  an edgeedge with one F(2)Li5 trigonal bipyramid. In the second F site, F(2) is bonded to one Li(2), one Li(3), one Li(4), one Li(6), and one Li(7) atom to form distorted FLi5 trigonal bipyramids that share  a cornercorner with one O(4)Li5Ni pentagonal pyramid, corners with two equivalent O(3)Li5Ni pentagonal pyramids,  a cornercorner with one F(1)Li5 trigonal bipyramid,  an edgeedge with one O(3)Li5Ni pentagonal pyramid,  an edgeedge with one O(4)Li5Ni pentagonal pyramid, and  an edgeedge with one F(1)Li5 trigonal bipyramid. is represented by the Crystallographic Information File (CIF) [CIF]
data_Li7Ni(O2F)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.465
_cell_length_b   5.471
_cell_length_c   5.577
_cell_angle_alpha   117.694
_cell_angle_beta   91.443
_cell_angle_gamma   112.238
_symmetry_Int_Tables_number   1
_cell_volume   132.492
_cell_formula_units_Z   1
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
  F  F0  1  0.545  0.467  0.717  1.0
  F  F1  1  0.443  0.576  0.287  1.0
  Li  Li2  1  0.882  0.400  0.675  1.0
  Li  Li3  1  0.482  0.253  0.306  1.0
  Li  Li4  1  0.801  0.878  0.362  1.0
  Li  Li5  1  0.362  0.711  0.030  1.0
  Li  Li6  1  0.239  0.105  0.645  1.0
  Li  Li7  1  0.541  0.842  0.711  1.0
  Li  Li8  1  0.057  0.533  0.306  1.0
  Ni  Ni9  1  0.994  0.977  0.992  1.0
  O  O10  1  0.768  0.125  0.226  1.0
  O  O11  1  0.920  0.123  0.775  1.0
  O  O12  1  0.123  0.885  0.235  1.0
  O  O13  1  0.182  0.789  0.742  1.0
[/CIF]
.