The structure described by NaTb3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Na(1) is bonded to twelve Tb(1,1) atoms to form NaTb12 cuboctahedra that share corners with six equivalent Na(1)Tb12 cuboctahedra; corners with twelve Tb(1,1)Na4Tb8 cuboctahedra; edges with eighteen Tb(1,1)Na4Tb8 cuboctahedra; faces with eight equivalent Na(1)Tb12 cuboctahedra; and faces with twelve Tb(1,1)Na4Tb8 cuboctahedra. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Na(1) and eight Tb(1,1) atoms to form TbNa4Tb8 cuboctahedra that share corners with four equivalent Na(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Na4Tb8 cuboctahedra; edges with six equivalent Na(1)Tb12 cuboctahedra; edges with twelve Tb(1,1)Na4Tb8 cuboctahedra; faces with four equivalent Na(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1)Na4Tb8 cuboctahedra. In the second Tb site, Tb(1) is bonded to four equivalent Na(1) and eight equivalent Tb(1) atoms to form TbNa4Tb8 cuboctahedra that share corners with four equivalent Na(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Na4Tb8 cuboctahedra; edges with six equivalent Na(1)Tb12 cuboctahedra; edges with twelve equivalent Tb(1)Na4Tb8 cuboctahedra; faces with four equivalent Na(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1)Na4Tb8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaTb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.230
_cell_length_b   7.230
_cell_length_c   5.771
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   261.242
_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
  Na  Na0  1  0.333  0.667  0.750  1.0
  Na  Na1  1  0.667  0.333  0.250  1.0
  Tb  Tb2  1  0.328  0.164  0.750  1.0
  Tb  Tb3  1  0.836  0.164  0.750  1.0
  Tb  Tb4  1  0.164  0.836  0.250  1.0
  Tb  Tb5  1  0.836  0.672  0.750  1.0
  Tb  Tb6  1  0.164  0.328  0.250  1.0
  Tb  Tb7  1  0.672  0.836  0.250  1.0
[/CIF]
.
The structure described by NaTb3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Na(1) is bonded to twelve Tb(1,1) atoms to form NaTb12 cuboctahedra that share corners with six equivalent Na(1)Tb12 cuboctahedra; corners with twelve Tb(1,1)Na4Tb8 cuboctahedra; edges with eighteen Tb(1,1)Na4Tb8 cuboctahedra; faces with eight equivalent Na(1)Tb12 cuboctahedra; and faces with twelve Tb(1,1)Na4Tb8 cuboctahedra. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Na(1) and eight Tb(1,1) atoms to form TbNa4Tb8 cuboctahedra that share corners with four equivalent Na(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Na4Tb8 cuboctahedra; edges with six equivalent Na(1)Tb12 cuboctahedra; edges with twelve Tb(1,1)Na4Tb8 cuboctahedra; faces with four equivalent Na(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1)Na4Tb8 cuboctahedra. In the second Tb site, Tb(1) is bonded to four equivalent Na(1) and eight equivalent Tb(1) atoms to form TbNa4Tb8 cuboctahedra that share corners with four equivalent Na(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Na4Tb8 cuboctahedra; edges with six equivalent Na(1)Tb12 cuboctahedra; edges with twelve equivalent Tb(1)Na4Tb8 cuboctahedra; faces with four equivalent Na(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1)Na4Tb8 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaTb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.230
_cell_length_b   7.230
_cell_length_c   5.771
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   261.242
_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
  Na  Na0  1  0.333  0.667  0.750  1.0
  Na  Na1  1  0.667  0.333  0.250  1.0
  Tb  Tb2  1  0.328  0.164  0.750  1.0
  Tb  Tb3  1  0.836  0.164  0.750  1.0
  Tb  Tb4  1  0.164  0.836  0.250  1.0
  Tb  Tb5  1  0.836  0.672  0.750  1.0
  Tb  Tb6  1  0.164  0.328  0.250  1.0
  Tb  Tb7  1  0.672  0.836  0.250  1.0
[/CIF]
.