The material described by RbK3 crystallizes in the hexagonal P6_3/mmc space group. Rb(1) is bonded to twelve equivalent K(1) atoms to form a mixture of corner and face-sharing RbK12 cuboctahedra. K(1) is bonded in a 4-coordinate geometry to four equivalent Rb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Rb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.714
_cell_length_b   9.714
_cell_length_c   7.922
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   647.336
_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
  K  K0  1  0.165  0.330  0.250  1.0
  K  K1  1  0.670  0.835  0.250  1.0
  K  K2  1  0.165  0.835  0.250  1.0
  K  K3  1  0.835  0.670  0.750  1.0
  K  K4  1  0.330  0.165  0.750  1.0
  K  K5  1  0.835  0.165  0.750  1.0
  Rb  Rb6  1  0.333  0.667  0.750  1.0
  Rb  Rb7  1  0.667  0.333  0.250  1.0
[/CIF]
.
The material described by RbK3 crystallizes in the hexagonal P6_3/mmc space group. Rb(1) is bonded to twelve equivalent K(1) atoms to form a mixture of corner and face-sharing RbK12 cuboctahedra. K(1) is bonded in a 4-coordinate geometry to four equivalent Rb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Rb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.714
_cell_length_b   9.714
_cell_length_c   7.922
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   647.336
_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
  K  K0  1  0.165  0.330  0.250  1.0
  K  K1  1  0.670  0.835  0.250  1.0
  K  K2  1  0.165  0.835  0.250  1.0
  K  K3  1  0.835  0.670  0.750  1.0
  K  K4  1  0.330  0.165  0.750  1.0
  K  K5  1  0.835  0.165  0.750  1.0
  Rb  Rb6  1  0.333  0.667  0.750  1.0
  Rb  Rb7  1  0.667  0.333  0.250  1.0
[/CIF]
.