The material described by RbTlBr3 is Ilmenite-like structured and crystallizes in the trigonal R3c space group. Rb(1) is bonded in a 6-coordinate geometry to six equivalent Br(1) atoms. Tl(1) is bonded to six equivalent Br(1) atoms to form corner-sharing TlBr6 octahedra. The corner-sharing octahedral tilt angles are 24°. Br(1) is bonded to two equivalent Rb(1) and two equivalent Tl(1) atoms to form a mixture of distorted corner and edge-sharing BrRb2Tl2 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbTlBr3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.228
_cell_length_b   8.228
_cell_length_c   8.228
_cell_angle_alpha   60.013
_cell_angle_beta   60.013
_cell_angle_gamma   60.013
_symmetry_Int_Tables_number   1
_cell_volume   393.952
_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
  Rb  Rb0  1  0.726  0.726  0.726  1.0
  Rb  Rb1  1  0.226  0.226  0.226  1.0
  Tl  Tl2  1  0.995  0.995  0.995  1.0
  Tl  Tl3  1  0.495  0.495  0.495  1.0
  Br  Br4  1  0.755  0.173  0.321  1.0
  Br  Br5  1  0.173  0.321  0.755  1.0
  Br  Br6  1  0.321  0.755  0.173  1.0
  Br  Br7  1  0.821  0.673  0.255  1.0
  Br  Br8  1  0.255  0.821  0.673  1.0
  Br  Br9  1  0.673  0.255  0.821  1.0
[/CIF]
.
The material described by RbTlBr3 is Ilmenite-like structured and crystallizes in the trigonal R3c space group. Rb(1) is bonded in a 6-coordinate geometry to six equivalent Br(1) atoms. Tl(1) is bonded to six equivalent Br(1) atoms to form corner-sharing TlBr6 octahedra. The corner-sharing octahedral tilt angles are 24°. Br(1) is bonded to two equivalent Rb(1) and two equivalent Tl(1) atoms to form a mixture of distorted corner and edge-sharing BrRb2Tl2 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_RbTlBr3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.228
_cell_length_b   8.228
_cell_length_c   8.228
_cell_angle_alpha   60.013
_cell_angle_beta   60.013
_cell_angle_gamma   60.013
_symmetry_Int_Tables_number   1
_cell_volume   393.952
_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
  Rb  Rb0  1  0.726  0.726  0.726  1.0
  Rb  Rb1  1  0.226  0.226  0.226  1.0
  Tl  Tl2  1  0.995  0.995  0.995  1.0
  Tl  Tl3  1  0.495  0.495  0.495  1.0
  Br  Br4  1  0.755  0.173  0.321  1.0
  Br  Br5  1  0.173  0.321  0.755  1.0
  Br  Br6  1  0.321  0.755  0.173  1.0
  Br  Br7  1  0.821  0.673  0.255  1.0
  Br  Br8  1  0.255  0.821  0.673  1.0
  Br  Br9  1  0.673  0.255  0.821  1.0
[/CIF]
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