The crystal structure described by Tb3Pm is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to eight Tb(1,1) and four equivalent Pm(1) atoms to form TbTb8Pm4 cuboctahedra that share corners with four equivalent Pm(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Tb8Pm4 cuboctahedra; edges with six equivalent Pm(1)Tb12 cuboctahedra; edges with twelve Tb(1,1)Tb8Pm4 cuboctahedra; faces with four equivalent Pm(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1,1)Tb8Pm4 cuboctahedra. In the second Tb site, Tb(1) is bonded to eight Tb(1,1,1) and four equivalent Pm(1) atoms to form TbTb8Pm4 cuboctahedra that share corners with four equivalent Pm(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Tb8Pm4 cuboctahedra; edges with six equivalent Pm(1)Tb12 cuboctahedra; edges with twelve Tb(1,1,1)Tb8Pm4 cuboctahedra; faces with four equivalent Pm(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1,1)Tb8Pm4 cuboctahedra. In the third Tb site, Tb(1) is bonded to eight Tb(1,1) and four equivalent Pm(1) atoms to form TbTb8Pm4 cuboctahedra that share corners with four equivalent Pm(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Tb8Pm4 cuboctahedra; edges with six equivalent Pm(1)Tb12 cuboctahedra; edges with twelve Tb(1,1)Tb8Pm4 cuboctahedra; faces with four equivalent Pm(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1,1)Tb8Pm4 cuboctahedra. Pm(1) is bonded to twelve Tb(1,1,1) atoms to form PmTb12 cuboctahedra that share corners with six equivalent Pm(1)Tb12 cuboctahedra; corners with twelve Tb(1,1)Tb8Pm4 cuboctahedra; edges with eighteen Tb(1,1,1)Tb8Pm4 cuboctahedra; faces with eight equivalent Pm(1)Tb12 cuboctahedra; and faces with twelve Tb(1,1,1)Tb8Pm4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb3Pm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.308
_cell_length_b   7.308
_cell_length_c   5.846
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   270.428
_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
  Tb  Tb0  1  0.835  0.165  0.750  1.0
  Tb  Tb1  1  0.330  0.165  0.750  1.0
  Tb  Tb2  1  0.835  0.670  0.750  1.0
  Tb  Tb3  1  0.165  0.835  0.250  1.0
  Tb  Tb4  1  0.670  0.835  0.250  1.0
  Tb  Tb5  1  0.165  0.330  0.250  1.0
  Pm  Pm6  1  0.667  0.333  0.250  1.0
  Pm  Pm7  1  0.333  0.667  0.750  1.0
[/CIF]
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The crystal structure described by Tb3Pm is Magnesium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to eight Tb(1,1) and four equivalent Pm(1) atoms to form TbTb8Pm4 cuboctahedra that share corners with four equivalent Pm(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Tb8Pm4 cuboctahedra; edges with six equivalent Pm(1)Tb12 cuboctahedra; edges with twelve Tb(1,1)Tb8Pm4 cuboctahedra; faces with four equivalent Pm(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1,1)Tb8Pm4 cuboctahedra. In the second Tb site, Tb(1) is bonded to eight Tb(1,1,1) and four equivalent Pm(1) atoms to form TbTb8Pm4 cuboctahedra that share corners with four equivalent Pm(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Tb8Pm4 cuboctahedra; edges with six equivalent Pm(1)Tb12 cuboctahedra; edges with twelve Tb(1,1,1)Tb8Pm4 cuboctahedra; faces with four equivalent Pm(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1,1)Tb8Pm4 cuboctahedra. In the third Tb site, Tb(1) is bonded to eight Tb(1,1) and four equivalent Pm(1) atoms to form TbTb8Pm4 cuboctahedra that share corners with four equivalent Pm(1)Tb12 cuboctahedra; corners with fourteen Tb(1,1)Tb8Pm4 cuboctahedra; edges with six equivalent Pm(1)Tb12 cuboctahedra; edges with twelve Tb(1,1)Tb8Pm4 cuboctahedra; faces with four equivalent Pm(1)Tb12 cuboctahedra; and faces with sixteen Tb(1,1,1)Tb8Pm4 cuboctahedra. Pm(1) is bonded to twelve Tb(1,1,1) atoms to form PmTb12 cuboctahedra that share corners with six equivalent Pm(1)Tb12 cuboctahedra; corners with twelve Tb(1,1)Tb8Pm4 cuboctahedra; edges with eighteen Tb(1,1,1)Tb8Pm4 cuboctahedra; faces with eight equivalent Pm(1)Tb12 cuboctahedra; and faces with twelve Tb(1,1,1)Tb8Pm4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb3Pm
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.308
_cell_length_b   7.308
_cell_length_c   5.846
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   270.428
_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
  Tb  Tb0  1  0.835  0.165  0.750  1.0
  Tb  Tb1  1  0.330  0.165  0.750  1.0
  Tb  Tb2  1  0.835  0.670  0.750  1.0
  Tb  Tb3  1  0.165  0.835  0.250  1.0
  Tb  Tb4  1  0.670  0.835  0.250  1.0
  Tb  Tb5  1  0.165  0.330  0.250  1.0
  Pm  Pm6  1  0.667  0.333  0.250  1.0
  Pm  Pm7  1  0.333  0.667  0.750  1.0
[/CIF]
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