The compound described by Na2ZnAlF7 crystallizes in the orthorhombic Imma 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 four equivalent F(1) atoms to form NaF8 hexagonal bipyramids that share corners with two equivalent Na(1)F8 hexagonal bipyramids, corners with two equivalent Al(1)F6 octahedra, edges with four equivalent Na(2)F8 hexagonal bipyramids, edges with two equivalent Al(1)F6 octahedra, and edges with four equivalent Zn(1)F6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the second Na site, Na(2) is bonded to four equivalent F(1) and four equivalent F(2) atoms to form distorted NaF8 hexagonal bipyramids that share edges with two equivalent Na(2)F8 hexagonal bipyramids, edges with four equivalent Na(1)F8 hexagonal bipyramids, edges with two equivalent Zn(1)F6 octahedra, and edges with four equivalent Al(1)F6 octahedra. Zn(1) is bonded to two equivalent F(3) and four equivalent F(1) atoms to form ZnF6 octahedra that share corners with two equivalent Zn(1)F6 octahedra, corners with four equivalent Al(1)F6 octahedra, edges with two equivalent Na(2)F8 hexagonal bipyramids, and edges with four equivalent Na(1)F8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 38-54°. Al(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form AlF6 octahedra that share corners with two equivalent Na(1)F8 hexagonal bipyramids, corners with four equivalent Zn(1)F6 octahedra, edges with two equivalent Na(1)F8 hexagonal bipyramids, and edges with four equivalent Na(2)F8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 38°. There are three inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Zn(1), and one Al(1) atom. In the second F site, F(2) is bonded to one Na(1), two equivalent Na(2), and one Al(1) atom to form a mixture of distorted edge and corner-sharing FNa3Al tetrahedra. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Na2AlZnF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.306
_cell_length_b   7.306
_cell_length_c   7.306
_cell_angle_alpha   120.921
_cell_angle_beta   118.424
_cell_angle_gamma   90.582
_symmetry_Int_Tables_number   1
_cell_volume   276.893
_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
  Na  Na0  1  0.000  0.000  0.000  1.0
  Na  Na1  1  0.000  0.500  0.000  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.500  0.500  0.000  1.0
  Al  Al4  1  0.500  0.000  0.500  1.0
  Al  Al5  1  0.000  0.500  0.500  1.0
  Zn  Zn6  1  0.500  0.500  0.500  1.0
  Zn  Zn7  1  0.500  0.000  0.000  1.0
  F  F8  1  0.825  0.204  0.251  1.0
  F  F9  1  0.196  0.917  0.279  1.0
  F  F10  1  0.452  0.704  0.379  1.0
  F  F11  1  0.138  0.417  0.721  1.0
  F  F12  1  0.548  0.296  0.621  1.0
  F  F13  1  0.862  0.583  0.279  1.0
  F  F14  1  0.825  0.573  0.621  1.0
  F  F15  1  0.376  0.250  0.126  1.0
  F  F16  1  0.624  0.750  0.874  1.0
  F  F17  1  0.175  0.796  0.749  1.0
  F  F18  1  0.548  0.927  0.251  1.0
  F  F19  1  0.175  0.427  0.379  1.0
  F  F20  1  0.452  0.073  0.749  1.0
  F  F21  1  0.804  0.083  0.721  1.0
[/CIF]
.
The compound described by Na2ZnAlF7 crystallizes in the orthorhombic Imma 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 four equivalent F(1) atoms to form NaF8 hexagonal bipyramids that share corners with two equivalent Na(1)F8 hexagonal bipyramids, corners with two equivalent Al(1)F6 octahedra, edges with four equivalent Na(2)F8 hexagonal bipyramids, edges with two equivalent Al(1)F6 octahedra, and edges with four equivalent Zn(1)F6 octahedra. The corner-sharing octahedral tilt angles are 49°. In the second Na site, Na(2) is bonded to four equivalent F(1) and four equivalent F(2) atoms to form distorted NaF8 hexagonal bipyramids that share edges with two equivalent Na(2)F8 hexagonal bipyramids, edges with four equivalent Na(1)F8 hexagonal bipyramids, edges with two equivalent Zn(1)F6 octahedra, and edges with four equivalent Al(1)F6 octahedra. Zn(1) is bonded to two equivalent F(3) and four equivalent F(1) atoms to form ZnF6 octahedra that share corners with two equivalent Zn(1)F6 octahedra, corners with four equivalent Al(1)F6 octahedra, edges with two equivalent Na(2)F8 hexagonal bipyramids, and edges with four equivalent Na(1)F8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 38-54°. Al(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form AlF6 octahedra that share corners with two equivalent Na(1)F8 hexagonal bipyramids, corners with four equivalent Zn(1)F6 octahedra, edges with two equivalent Na(1)F8 hexagonal bipyramids, and edges with four equivalent Na(2)F8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 38°. There are three inequivalent F sites. In the first F site, F(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Zn(1), and one Al(1) atom. In the second F site, F(2) is bonded to one Na(1), two equivalent Na(2), and one Al(1) atom to form a mixture of distorted edge and corner-sharing FNa3Al tetrahedra. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent Na(1) and two equivalent Zn(1) atoms. is represented by the CIF file [CIF]
data_Na2AlZnF7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.306
_cell_length_b   7.306
_cell_length_c   7.306
_cell_angle_alpha   120.921
_cell_angle_beta   118.424
_cell_angle_gamma   90.582
_symmetry_Int_Tables_number   1
_cell_volume   276.893
_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
  Na  Na0  1  0.000  0.000  0.000  1.0
  Na  Na1  1  0.000  0.500  0.000  1.0
  Na  Na2  1  0.000  0.000  0.500  1.0
  Na  Na3  1  0.500  0.500  0.000  1.0
  Al  Al4  1  0.500  0.000  0.500  1.0
  Al  Al5  1  0.000  0.500  0.500  1.0
  Zn  Zn6  1  0.500  0.500  0.500  1.0
  Zn  Zn7  1  0.500  0.000  0.000  1.0
  F  F8  1  0.825  0.204  0.251  1.0
  F  F9  1  0.196  0.917  0.279  1.0
  F  F10  1  0.452  0.704  0.379  1.0
  F  F11  1  0.138  0.417  0.721  1.0
  F  F12  1  0.548  0.296  0.621  1.0
  F  F13  1  0.862  0.583  0.279  1.0
  F  F14  1  0.825  0.573  0.621  1.0
  F  F15  1  0.376  0.250  0.126  1.0
  F  F16  1  0.624  0.750  0.874  1.0
  F  F17  1  0.175  0.796  0.749  1.0
  F  F18  1  0.548  0.927  0.251  1.0
  F  F19  1  0.175  0.427  0.379  1.0
  F  F20  1  0.452  0.073  0.749  1.0
  F  F21  1  0.804  0.083  0.721  1.0
[/CIF]
.