The crystal structure described by Rb3Nb is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Rb(1) is bonded in a 4-coordinate geometry to four equivalent Nb(1) atoms. Nb(1) is bonded to twelve equivalent Rb(1) atoms to form a mixture of face and corner-sharing NbRb12 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Nb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.759
_cell_length_b   8.759
_cell_length_c   6.885
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   457.397
_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  0.179  0.357  0.250  1.0
  Rb  Rb1  1  0.643  0.821  0.250  1.0
  Rb  Rb2  1  0.179  0.821  0.250  1.0
  Rb  Rb3  1  0.821  0.643  0.750  1.0
  Rb  Rb4  1  0.357  0.179  0.750  1.0
  Rb  Rb5  1  0.821  0.179  0.750  1.0
  Nb  Nb6  1  0.333  0.667  0.750  1.0
  Nb  Nb7  1  0.667  0.333  0.250  1.0
[/CIF]
.
The crystal structure described by Rb3Nb is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Rb(1) is bonded in a 4-coordinate geometry to four equivalent Nb(1) atoms. Nb(1) is bonded to twelve equivalent Rb(1) atoms to form a mixture of face and corner-sharing NbRb12 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb3Nb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.759
_cell_length_b   8.759
_cell_length_c   6.885
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   457.397
_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  0.179  0.357  0.250  1.0
  Rb  Rb1  1  0.643  0.821  0.250  1.0
  Rb  Rb2  1  0.179  0.821  0.250  1.0
  Rb  Rb3  1  0.821  0.643  0.750  1.0
  Rb  Rb4  1  0.357  0.179  0.750  1.0
  Rb  Rb5  1  0.821  0.179  0.750  1.0
  Nb  Nb6  1  0.333  0.667  0.750  1.0
  Nb  Nb7  1  0.667  0.333  0.250  1.0
[/CIF]
.