The material described by (Pb2BiF6)2F2 is Fluorite-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure consists of two hydrofluoric acid atoms inside a Pb2BiF6 framework. In the Pb2BiF6 framework, Pb(1) is bonded in a body-centered cubic geometry to four equivalent F(1) and four equivalent F(2) atoms. Bi(1) is bonded in a body-centered cubic geometry to eight equivalent F(2) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded to four equivalent Pb(1) atoms to form FPb4 tetrahedra that share corners with four equivalent F(1)Pb4 tetrahedra, corners with twelve equivalent F(2)Bi2Pb2 tetrahedra, edges with two equivalent F(2)Bi2Pb2 tetrahedra, and edges with four equivalent F(1)Pb4 tetrahedra. In the second F site, F(2) is bonded to two equivalent Pb(1) and two equivalent Bi(1) atoms to form FBi2Pb2 tetrahedra that share corners with six equivalent F(1)Pb4 tetrahedra, corners with ten equivalent F(2)Bi2Pb2 tetrahedra,  an edgeedge with one F(1)Pb4 tetrahedra, and edges with five equivalent F(2)Bi2Pb2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BiPb2F7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.723
_cell_length_b   9.723
_cell_length_c   9.723
_cell_angle_alpha   155.901
_cell_angle_beta   155.901
_cell_angle_gamma   34.342
_symmetry_Int_Tables_number   1
_cell_volume   153.103
_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
  Bi  Bi0  1  0.500  0.500  0.000  1.0
  Pb  Pb1  1  0.834  0.834  0.000  1.0
  Pb  Pb2  1  0.166  0.166  0.000  1.0
  F  F3  1  0.250  0.750  0.500  1.0
  F  F4  1  0.584  0.084  0.500  1.0
  F  F5  1  0.916  0.416  0.500  1.0
  F  F6  1  0.084  0.584  0.500  1.0
  F  F7  1  0.416  0.916  0.500  1.0
  F  F8  1  0.750  0.250  0.500  1.0
  F  F9  1  0.000  0.000  0.000  1.0
[/CIF]
.
The material described by (Pb2BiF6)2F2 is Fluorite-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure consists of two hydrofluoric acid atoms inside a Pb2BiF6 framework. In the Pb2BiF6 framework, Pb(1) is bonded in a body-centered cubic geometry to four equivalent F(1) and four equivalent F(2) atoms. Bi(1) is bonded in a body-centered cubic geometry to eight equivalent F(2) atoms. There are two inequivalent F sites. In the first F site, F(1) is bonded to four equivalent Pb(1) atoms to form FPb4 tetrahedra that share corners with four equivalent F(1)Pb4 tetrahedra, corners with twelve equivalent F(2)Bi2Pb2 tetrahedra, edges with two equivalent F(2)Bi2Pb2 tetrahedra, and edges with four equivalent F(1)Pb4 tetrahedra. In the second F site, F(2) is bonded to two equivalent Pb(1) and two equivalent Bi(1) atoms to form FBi2Pb2 tetrahedra that share corners with six equivalent F(1)Pb4 tetrahedra, corners with ten equivalent F(2)Bi2Pb2 tetrahedra,  an edgeedge with one F(1)Pb4 tetrahedra, and edges with five equivalent F(2)Bi2Pb2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BiPb2F7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.723
_cell_length_b   9.723
_cell_length_c   9.723
_cell_angle_alpha   155.901
_cell_angle_beta   155.901
_cell_angle_gamma   34.342
_symmetry_Int_Tables_number   1
_cell_volume   153.103
_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
  Bi  Bi0  1  0.500  0.500  0.000  1.0
  Pb  Pb1  1  0.834  0.834  0.000  1.0
  Pb  Pb2  1  0.166  0.166  0.000  1.0
  F  F3  1  0.250  0.750  0.500  1.0
  F  F4  1  0.584  0.084  0.500  1.0
  F  F5  1  0.916  0.416  0.500  1.0
  F  F6  1  0.084  0.584  0.500  1.0
  F  F7  1  0.416  0.916  0.500  1.0
  F  F8  1  0.750  0.250  0.500  1.0
  F  F9  1  0.000  0.000  0.000  1.0
[/CIF]
.