The structure described by Li2Cu2F7 crystallizes in the cubic Fd-3m space group. Li(1) is bonded to two equivalent F(2) and six equivalent F(1) atoms to form distorted LiF8 hexagonal bipyramids that share edges with six equivalent Li(1)F8 hexagonal bipyramids and edges with six equivalent Cu(1)F6 octahedra. Cu(1) is bonded to six equivalent F(1) atoms to form CuF6 octahedra that share corners with six equivalent Cu(1)F6 octahedra and edges with six equivalent Li(1)F8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Li(1) and two equivalent Cu(1) atoms. In the second F site, F(2) is bonded to four equivalent Li(1) atoms to form corner-sharing FLi4 tetrahedra. is represented by the CIF card [CIF]
data_Li2Cu2F7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.094
_cell_length_b   7.094
_cell_length_c   7.094
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   252.396
_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  0.125  0.125  0.625  1.0
  Li  Li1  1  0.125  0.625  0.125  1.0
  Li  Li2  1  0.125  0.125  0.125  1.0
  Li  Li3  1  0.625  0.125  0.125  1.0
  Cu  Cu4  1  0.125  0.625  0.625  1.0
  Cu  Cu5  1  0.625  0.625  0.625  1.0
  Cu  Cu6  1  0.625  0.125  0.625  1.0
  Cu  Cu7  1  0.625  0.625  0.125  1.0
  F  F8  1  0.296  0.704  0.704  1.0
  F  F9  1  0.704  0.296  0.704  1.0
  F  F10  1  0.296  0.296  0.704  1.0
  F  F11  1  0.546  0.954  0.954  1.0
  F  F12  1  0.704  0.704  0.296  1.0
  F  F13  1  0.000  0.000  0.000  1.0
  F  F14  1  0.954  0.546  0.954  1.0
  F  F15  1  0.296  0.704  0.296  1.0
  F  F16  1  0.250  0.250  0.250  1.0
  F  F17  1  0.546  0.546  0.954  1.0
  F  F18  1  0.704  0.296  0.296  1.0
  F  F19  1  0.954  0.954  0.546  1.0
  F  F20  1  0.546  0.954  0.546  1.0
  F  F21  1  0.954  0.546  0.546  1.0
[/CIF]
.
The structure described by Li2Cu2F7 crystallizes in the cubic Fd-3m space group. Li(1) is bonded to two equivalent F(2) and six equivalent F(1) atoms to form distorted LiF8 hexagonal bipyramids that share edges with six equivalent Li(1)F8 hexagonal bipyramids and edges with six equivalent Cu(1)F6 octahedra. Cu(1) is bonded to six equivalent F(1) atoms to form CuF6 octahedra that share corners with six equivalent Cu(1)F6 octahedra and edges with six equivalent Li(1)F8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to two equivalent Li(1) and two equivalent Cu(1) atoms. In the second F site, F(2) is bonded to four equivalent Li(1) atoms to form corner-sharing FLi4 tetrahedra. is represented by the CIF card [CIF]
data_Li2Cu2F7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.094
_cell_length_b   7.094
_cell_length_c   7.094
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   252.396
_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  0.125  0.125  0.625  1.0
  Li  Li1  1  0.125  0.625  0.125  1.0
  Li  Li2  1  0.125  0.125  0.125  1.0
  Li  Li3  1  0.625  0.125  0.125  1.0
  Cu  Cu4  1  0.125  0.625  0.625  1.0
  Cu  Cu5  1  0.625  0.625  0.625  1.0
  Cu  Cu6  1  0.625  0.125  0.625  1.0
  Cu  Cu7  1  0.625  0.625  0.125  1.0
  F  F8  1  0.296  0.704  0.704  1.0
  F  F9  1  0.704  0.296  0.704  1.0
  F  F10  1  0.296  0.296  0.704  1.0
  F  F11  1  0.546  0.954  0.954  1.0
  F  F12  1  0.704  0.704  0.296  1.0
  F  F13  1  0.000  0.000  0.000  1.0
  F  F14  1  0.954  0.546  0.954  1.0
  F  F15  1  0.296  0.704  0.296  1.0
  F  F16  1  0.250  0.250  0.250  1.0
  F  F17  1  0.546  0.546  0.954  1.0
  F  F18  1  0.704  0.296  0.296  1.0
  F  F19  1  0.954  0.954  0.546  1.0
  F  F20  1  0.546  0.954  0.546  1.0
  F  F21  1  0.954  0.546  0.546  1.0
[/CIF]
.