The crystal structure described by RbYb3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded to four equivalent Yb(2) and eight equivalent Yb(1) atoms to form RbYb12 cuboctahedra that share corners with four equivalent Rb(1)Yb12 cuboctahedra, corners with eight equivalent Yb(2)Rb4Yb8 cuboctahedra, edges with eight equivalent Rb(1)Yb12 cuboctahedra, edges with sixteen equivalent Yb(1)Rb4Yb8 cuboctahedra, faces with four equivalent Rb(1)Yb12 cuboctahedra, faces with six equivalent Yb(2)Rb4Yb8 cuboctahedra, and faces with eight equivalent Yb(1)Rb4Yb8 cuboctahedra. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to four equivalent Rb(1), four equivalent Yb(1), and four equivalent Yb(2) atoms to form YbRb4Yb8 cuboctahedra that share corners with twelve equivalent Yb(1)Rb4Yb8 cuboctahedra, edges with eight equivalent Rb(1)Yb12 cuboctahedra, edges with eight equivalent Yb(1)Rb4Yb8 cuboctahedra, edges with eight equivalent Yb(2)Rb4Yb8 cuboctahedra, faces with four equivalent Rb(1)Yb12 cuboctahedra, faces with four equivalent Yb(2)Rb4Yb8 cuboctahedra, and faces with ten equivalent Yb(1)Rb4Yb8 cuboctahedra. In the second Yb site, Yb(2) is bonded to four equivalent Rb(1) and eight equivalent Yb(1) atoms to form YbRb4Yb8 cuboctahedra that share corners with four equivalent Yb(2)Rb4Yb8 cuboctahedra, corners with eight equivalent Rb(1)Yb12 cuboctahedra, edges with eight equivalent Yb(2)Rb4Yb8 cuboctahedra, edges with sixteen equivalent Yb(1)Rb4Yb8 cuboctahedra, faces with four equivalent Yb(2)Rb4Yb8 cuboctahedra, faces with six equivalent Rb(1)Yb12 cuboctahedra, and faces with eight equivalent Yb(1)Rb4Yb8 cuboctahedra. is represented by the CIF card [CIF]
data_RbYb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.130
_cell_length_b   7.130
_cell_length_c   7.130
_cell_angle_alpha   131.776
_cell_angle_beta   131.776
_cell_angle_gamma   70.583
_symmetry_Int_Tables_number   1
_cell_volume   197.527
_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
  Rb  Rb0  1  0.000  0.000  0.000  1.0
  Yb  Yb1  1  0.750  0.250  0.500  1.0
  Yb  Yb2  1  0.250  0.750  0.500  1.0
  Yb  Yb3  1  0.500  0.500  0.000  1.0
[/CIF]
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The crystal structure described by RbYb3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded to four equivalent Yb(2) and eight equivalent Yb(1) atoms to form RbYb12 cuboctahedra that share corners with four equivalent Rb(1)Yb12 cuboctahedra, corners with eight equivalent Yb(2)Rb4Yb8 cuboctahedra, edges with eight equivalent Rb(1)Yb12 cuboctahedra, edges with sixteen equivalent Yb(1)Rb4Yb8 cuboctahedra, faces with four equivalent Rb(1)Yb12 cuboctahedra, faces with six equivalent Yb(2)Rb4Yb8 cuboctahedra, and faces with eight equivalent Yb(1)Rb4Yb8 cuboctahedra. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to four equivalent Rb(1), four equivalent Yb(1), and four equivalent Yb(2) atoms to form YbRb4Yb8 cuboctahedra that share corners with twelve equivalent Yb(1)Rb4Yb8 cuboctahedra, edges with eight equivalent Rb(1)Yb12 cuboctahedra, edges with eight equivalent Yb(1)Rb4Yb8 cuboctahedra, edges with eight equivalent Yb(2)Rb4Yb8 cuboctahedra, faces with four equivalent Rb(1)Yb12 cuboctahedra, faces with four equivalent Yb(2)Rb4Yb8 cuboctahedra, and faces with ten equivalent Yb(1)Rb4Yb8 cuboctahedra. In the second Yb site, Yb(2) is bonded to four equivalent Rb(1) and eight equivalent Yb(1) atoms to form YbRb4Yb8 cuboctahedra that share corners with four equivalent Yb(2)Rb4Yb8 cuboctahedra, corners with eight equivalent Rb(1)Yb12 cuboctahedra, edges with eight equivalent Yb(2)Rb4Yb8 cuboctahedra, edges with sixteen equivalent Yb(1)Rb4Yb8 cuboctahedra, faces with four equivalent Yb(2)Rb4Yb8 cuboctahedra, faces with six equivalent Rb(1)Yb12 cuboctahedra, and faces with eight equivalent Yb(1)Rb4Yb8 cuboctahedra. is represented by the CIF card [CIF]
data_RbYb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.130
_cell_length_b   7.130
_cell_length_c   7.130
_cell_angle_alpha   131.776
_cell_angle_beta   131.776
_cell_angle_gamma   70.583
_symmetry_Int_Tables_number   1
_cell_volume   197.527
_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
  Rb  Rb0  1  0.000  0.000  0.000  1.0
  Yb  Yb1  1  0.750  0.250  0.500  1.0
  Yb  Yb2  1  0.250  0.750  0.500  1.0
  Yb  Yb3  1  0.500  0.500  0.000  1.0
[/CIF]
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