The compound described by Na2VCuF7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent F(2), two equivalent F(3), and two equivalent F(5) atoms to form distorted NaF6 octahedra that share corners with two equivalent Na(2)F7 hexagonal pyramids, corners with two equivalent V(1)F6 octahedra, corners with two equivalent Cu(1)F6 octahedra, edges with two equivalent Na(2)F7 hexagonal pyramids, edges with two equivalent Na(1)F6 octahedra, and edges with two equivalent V(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 63-69°. In the second Na site, Na(2) is bonded to one F(1), one F(2), one F(3), two equivalent F(4), and two equivalent F(5) atoms to form distorted NaF7 hexagonal pyramids that share corners with two equivalent Na(1)F6 octahedra, corners with two equivalent V(1)F6 octahedra, corners with two equivalent Cu(1)F6 octahedra, edges with two equivalent Na(1)F6 octahedra, edges with two equivalent V(1)F6 octahedra, and edges with two equivalent Cu(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 51-73°. V(1) is bonded to one F(2), one F(3), two equivalent F(4), and two equivalent F(5) atoms to form VF6 octahedra that share corners with two equivalent Na(2)F7 hexagonal pyramids, corners with two equivalent Na(1)F6 octahedra, corners with four equivalent Cu(1)F6 octahedra, edges with two equivalent Na(2)F7 hexagonal pyramids, and edges with two equivalent Na(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 42-63°. Cu(1) is bonded to two equivalent F(1), two equivalent F(4), and two equivalent F(5) atoms to form CuF6 octahedra that share corners with two equivalent Na(2)F7 hexagonal pyramids, corners with two equivalent Na(1)F6 octahedra, corners with two equivalent Cu(1)F6 octahedra, corners with four equivalent V(1)F6 octahedra, and edges with two equivalent Na(2)F7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 40-69°. There are five inequivalent F sites. In the first F site, F(5) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one V(1), and one Cu(1) atom. In the second F site, F(1) is bonded in a 3-coordinate geometry to one Na(2) and two equivalent Cu(1) atoms. In the third F site, F(2) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), two equivalent Na(1), and one V(1) atom. In the fourth F site, F(3) is bonded to one Na(2), two equivalent Na(1), and one V(1) atom to form corner-sharing FNa3V tetrahedra. In the fifth F site, F(4) is bonded in a 3-coordinate geometry to one Na(2), one V(1), and one Cu(1) atom. is represented by the CIF card [CIF]
data_Na2VCuF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.300
_cell_length_b   7.638
_cell_length_c   10.515
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   586.304
_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
  Na  Na0  1  0.000  0.500  0.000  1.0
  Na  Na1  1  0.500  0.500  0.000  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.500  0.000  0.500  1.0
  Na  Na4  1  0.250  0.223  0.761  1.0
  Na  Na5  1  0.750  0.777  0.239  1.0
  Na  Na6  1  0.750  0.723  0.739  1.0
  Na  Na7  1  0.250  0.277  0.261  1.0
  V  V8  1  0.250  0.726  0.762  1.0
  V  V9  1  0.750  0.274  0.238  1.0
  V  V10  1  0.750  0.226  0.738  1.0
  V  V11  1  0.250  0.774  0.262  1.0
  Cu  Cu12  1  0.000  0.000  0.000  1.0
  Cu  Cu13  1  0.500  0.000  0.000  1.0
  Cu  Cu14  1  0.000  0.500  0.500  1.0
  Cu  Cu15  1  0.500  0.500  0.500  1.0
  F  F16  1  0.250  0.085  0.990  1.0
  F  F17  1  0.750  0.915  0.010  1.0
  F  F18  1  0.750  0.585  0.510  1.0
  F  F19  1  0.250  0.415  0.490  1.0
  F  F20  1  0.250  0.954  0.670  1.0
  F  F21  1  0.750  0.046  0.330  1.0
  F  F22  1  0.750  0.454  0.830  1.0
  F  F23  1  0.250  0.546  0.170  1.0
  F  F24  1  0.250  0.493  0.847  1.0
  F  F25  1  0.750  0.507  0.153  1.0
  F  F26  1  0.750  0.993  0.653  1.0
  F  F27  1  0.250  0.007  0.347  1.0
  F  F28  1  0.952  0.165  0.853  1.0
  F  F29  1  0.452  0.835  0.147  1.0
  F  F30  1  0.048  0.665  0.647  1.0
  F  F31  1  0.548  0.335  0.353  1.0
  F  F32  1  0.048  0.835  0.147  1.0
  F  F33  1  0.548  0.165  0.853  1.0
  F  F34  1  0.952  0.335  0.353  1.0
  F  F35  1  0.452  0.665  0.647  1.0
  F  F36  1  0.050  0.779  0.881  1.0
  F  F37  1  0.550  0.221  0.119  1.0
  F  F38  1  0.950  0.279  0.619  1.0
  F  F39  1  0.450  0.721  0.381  1.0
  F  F40  1  0.950  0.221  0.119  1.0
  F  F41  1  0.450  0.779  0.881  1.0
  F  F42  1  0.050  0.721  0.381  1.0
  F  F43  1  0.550  0.279  0.619  1.0
[/CIF]
.
The compound described by Na2VCuF7 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent F(2), two equivalent F(3), and two equivalent F(5) atoms to form distorted NaF6 octahedra that share corners with two equivalent Na(2)F7 hexagonal pyramids, corners with two equivalent V(1)F6 octahedra, corners with two equivalent Cu(1)F6 octahedra, edges with two equivalent Na(2)F7 hexagonal pyramids, edges with two equivalent Na(1)F6 octahedra, and edges with two equivalent V(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 63-69°. In the second Na site, Na(2) is bonded to one F(1), one F(2), one F(3), two equivalent F(4), and two equivalent F(5) atoms to form distorted NaF7 hexagonal pyramids that share corners with two equivalent Na(1)F6 octahedra, corners with two equivalent V(1)F6 octahedra, corners with two equivalent Cu(1)F6 octahedra, edges with two equivalent Na(1)F6 octahedra, edges with two equivalent V(1)F6 octahedra, and edges with two equivalent Cu(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 51-73°. V(1) is bonded to one F(2), one F(3), two equivalent F(4), and two equivalent F(5) atoms to form VF6 octahedra that share corners with two equivalent Na(2)F7 hexagonal pyramids, corners with two equivalent Na(1)F6 octahedra, corners with four equivalent Cu(1)F6 octahedra, edges with two equivalent Na(2)F7 hexagonal pyramids, and edges with two equivalent Na(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 42-63°. Cu(1) is bonded to two equivalent F(1), two equivalent F(4), and two equivalent F(5) atoms to form CuF6 octahedra that share corners with two equivalent Na(2)F7 hexagonal pyramids, corners with two equivalent Na(1)F6 octahedra, corners with two equivalent Cu(1)F6 octahedra, corners with four equivalent V(1)F6 octahedra, and edges with two equivalent Na(2)F7 hexagonal pyramids. The corner-sharing octahedral tilt angles range from 40-69°. There are five inequivalent F sites. In the first F site, F(5) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one V(1), and one Cu(1) atom. In the second F site, F(1) is bonded in a 3-coordinate geometry to one Na(2) and two equivalent Cu(1) atoms. In the third F site, F(2) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), two equivalent Na(1), and one V(1) atom. In the fourth F site, F(3) is bonded to one Na(2), two equivalent Na(1), and one V(1) atom to form corner-sharing FNa3V tetrahedra. In the fifth F site, F(4) is bonded in a 3-coordinate geometry to one Na(2), one V(1), and one Cu(1) atom. is represented by the CIF card [CIF]
data_Na2VCuF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.300
_cell_length_b   7.638
_cell_length_c   10.515
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   586.304
_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
  Na  Na0  1  0.000  0.500  0.000  1.0
  Na  Na1  1  0.500  0.500  0.000  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.500  0.000  0.500  1.0
  Na  Na4  1  0.250  0.223  0.761  1.0
  Na  Na5  1  0.750  0.777  0.239  1.0
  Na  Na6  1  0.750  0.723  0.739  1.0
  Na  Na7  1  0.250  0.277  0.261  1.0
  V  V8  1  0.250  0.726  0.762  1.0
  V  V9  1  0.750  0.274  0.238  1.0
  V  V10  1  0.750  0.226  0.738  1.0
  V  V11  1  0.250  0.774  0.262  1.0
  Cu  Cu12  1  0.000  0.000  0.000  1.0
  Cu  Cu13  1  0.500  0.000  0.000  1.0
  Cu  Cu14  1  0.000  0.500  0.500  1.0
  Cu  Cu15  1  0.500  0.500  0.500  1.0
  F  F16  1  0.250  0.085  0.990  1.0
  F  F17  1  0.750  0.915  0.010  1.0
  F  F18  1  0.750  0.585  0.510  1.0
  F  F19  1  0.250  0.415  0.490  1.0
  F  F20  1  0.250  0.954  0.670  1.0
  F  F21  1  0.750  0.046  0.330  1.0
  F  F22  1  0.750  0.454  0.830  1.0
  F  F23  1  0.250  0.546  0.170  1.0
  F  F24  1  0.250  0.493  0.847  1.0
  F  F25  1  0.750  0.507  0.153  1.0
  F  F26  1  0.750  0.993  0.653  1.0
  F  F27  1  0.250  0.007  0.347  1.0
  F  F28  1  0.952  0.165  0.853  1.0
  F  F29  1  0.452  0.835  0.147  1.0
  F  F30  1  0.048  0.665  0.647  1.0
  F  F31  1  0.548  0.335  0.353  1.0
  F  F32  1  0.048  0.835  0.147  1.0
  F  F33  1  0.548  0.165  0.853  1.0
  F  F34  1  0.952  0.335  0.353  1.0
  F  F35  1  0.452  0.665  0.647  1.0
  F  F36  1  0.050  0.779  0.881  1.0
  F  F37  1  0.550  0.221  0.119  1.0
  F  F38  1  0.950  0.279  0.619  1.0
  F  F39  1  0.450  0.721  0.381  1.0
  F  F40  1  0.950  0.221  0.119  1.0
  F  F41  1  0.450  0.779  0.881  1.0
  F  F42  1  0.050  0.721  0.381  1.0
  F  F43  1  0.550  0.279  0.619  1.0
[/CIF]
.