The structure described by RbBiF4 crystallizes in the cubic Fd-3m space group. Rb(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. Bi(1) is bonded in a distorted body-centered cubic geometry to two equivalent F(3) and six equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded to two equivalent Rb(1) and two equivalent Bi(1) atoms to form distorted FRb2Bi2 tetrahedra that share corners with two equivalent F(3)Bi4 tetrahedra, corners with two equivalent F(2)Rb4 tetrahedra, corners with twelve equivalent F(1)Rb2Bi2 tetrahedra,  an edgeedge with one F(3)Bi4 tetrahedra,  an edgeedge with one F(2)Rb4 tetrahedra, and edges with four equivalent F(1)Rb2Bi2 tetrahedra. In the second F site, F(2) is bonded to four equivalent Rb(1) atoms to form FRb4 tetrahedra that share corners with four equivalent F(2)Rb4 tetrahedra, corners with twelve equivalent F(1)Rb2Bi2 tetrahedra, and edges with six equivalent F(1)Rb2Bi2 tetrahedra. In the third F site, F(3) is bonded to four equivalent Bi(1) atoms to form FBi4 tetrahedra that share corners with four equivalent F(3)Bi4 tetrahedra, corners with twelve equivalent F(1)Rb2Bi2 tetrahedra, and edges with six equivalent F(1)Rb2Bi2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbBiF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.536
_cell_length_b   8.536
_cell_length_c   8.536
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   439.811
_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
  Rb  Rb0  1  0.625  0.625  0.125  1.0
  Rb  Rb1  1  0.625  0.625  0.625  1.0
  Rb  Rb2  1  0.625  0.125  0.625  1.0
  Rb  Rb3  1  0.125  0.625  0.625  1.0
  Bi  Bi4  1  0.625  0.125  0.125  1.0
  Bi  Bi5  1  0.125  0.625  0.125  1.0
  Bi  Bi6  1  0.125  0.125  0.125  1.0
  Bi  Bi7  1  0.125  0.125  0.625  1.0
  F  F8  1  0.463  0.463  0.037  1.0
  F  F9  1  0.037  0.463  0.037  1.0
  F  F10  1  0.213  0.213  0.787  1.0
  F  F11  1  0.787  0.213  0.213  1.0
  F  F12  1  0.463  0.037  0.463  1.0
  F  F13  1  0.787  0.787  0.213  1.0
  F  F14  1  0.463  0.037  0.037  1.0
  F  F15  1  0.750  0.750  0.750  1.0
  F  F16  1  0.787  0.213  0.787  1.0
  F  F17  1  0.213  0.787  0.787  1.0
  F  F18  1  0.500  0.500  0.500  1.0
  F  F19  1  0.037  0.037  0.463  1.0
  F  F20  1  0.250  0.250  0.250  1.0
  F  F21  1  0.213  0.787  0.213  1.0
  F  F22  1  0.037  0.463  0.463  1.0
  F  F23  1  0.000  0.000  0.000  1.0
[/CIF]
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The structure described by RbBiF4 crystallizes in the cubic Fd-3m space group. Rb(1) is bonded in a body-centered cubic geometry to two equivalent F(2) and six equivalent F(1) atoms. Bi(1) is bonded in a distorted body-centered cubic geometry to two equivalent F(3) and six equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded to two equivalent Rb(1) and two equivalent Bi(1) atoms to form distorted FRb2Bi2 tetrahedra that share corners with two equivalent F(3)Bi4 tetrahedra, corners with two equivalent F(2)Rb4 tetrahedra, corners with twelve equivalent F(1)Rb2Bi2 tetrahedra,  an edgeedge with one F(3)Bi4 tetrahedra,  an edgeedge with one F(2)Rb4 tetrahedra, and edges with four equivalent F(1)Rb2Bi2 tetrahedra. In the second F site, F(2) is bonded to four equivalent Rb(1) atoms to form FRb4 tetrahedra that share corners with four equivalent F(2)Rb4 tetrahedra, corners with twelve equivalent F(1)Rb2Bi2 tetrahedra, and edges with six equivalent F(1)Rb2Bi2 tetrahedra. In the third F site, F(3) is bonded to four equivalent Bi(1) atoms to form FBi4 tetrahedra that share corners with four equivalent F(3)Bi4 tetrahedra, corners with twelve equivalent F(1)Rb2Bi2 tetrahedra, and edges with six equivalent F(1)Rb2Bi2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbBiF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.536
_cell_length_b   8.536
_cell_length_c   8.536
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   439.811
_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
  Rb  Rb0  1  0.625  0.625  0.125  1.0
  Rb  Rb1  1  0.625  0.625  0.625  1.0
  Rb  Rb2  1  0.625  0.125  0.625  1.0
  Rb  Rb3  1  0.125  0.625  0.625  1.0
  Bi  Bi4  1  0.625  0.125  0.125  1.0
  Bi  Bi5  1  0.125  0.625  0.125  1.0
  Bi  Bi6  1  0.125  0.125  0.125  1.0
  Bi  Bi7  1  0.125  0.125  0.625  1.0
  F  F8  1  0.463  0.463  0.037  1.0
  F  F9  1  0.037  0.463  0.037  1.0
  F  F10  1  0.213  0.213  0.787  1.0
  F  F11  1  0.787  0.213  0.213  1.0
  F  F12  1  0.463  0.037  0.463  1.0
  F  F13  1  0.787  0.787  0.213  1.0
  F  F14  1  0.463  0.037  0.037  1.0
  F  F15  1  0.750  0.750  0.750  1.0
  F  F16  1  0.787  0.213  0.787  1.0
  F  F17  1  0.213  0.787  0.787  1.0
  F  F18  1  0.500  0.500  0.500  1.0
  F  F19  1  0.037  0.037  0.463  1.0
  F  F20  1  0.250  0.250  0.250  1.0
  F  F21  1  0.213  0.787  0.213  1.0
  F  F22  1  0.037  0.463  0.463  1.0
  F  F23  1  0.000  0.000  0.000  1.0
[/CIF]
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