The compound described by ThEu3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Th(1) is bonded to four equivalent Eu(2) and eight equivalent Eu(1) atoms to form ThEu12 cuboctahedra that share corners with four equivalent Th(1)Eu12 cuboctahedra, corners with eight equivalent Eu(2)Eu8Th4 cuboctahedra, edges with eight equivalent Th(1)Eu12 cuboctahedra, edges with sixteen equivalent Eu(1)Eu8Th4 cuboctahedra, faces with four equivalent Th(1)Eu12 cuboctahedra, faces with six equivalent Eu(2)Eu8Th4 cuboctahedra, and faces with eight equivalent Eu(1)Eu8Th4 cuboctahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent Th(1), four equivalent Eu(1), and four equivalent Eu(2) atoms to form EuEu8Th4 cuboctahedra that share corners with twelve equivalent Eu(1)Eu8Th4 cuboctahedra, edges with eight equivalent Th(1)Eu12 cuboctahedra, edges with eight equivalent Eu(1)Eu8Th4 cuboctahedra, edges with eight equivalent Eu(2)Eu8Th4 cuboctahedra, faces with four equivalent Th(1)Eu12 cuboctahedra, faces with four equivalent Eu(2)Eu8Th4 cuboctahedra, and faces with ten equivalent Eu(1)Eu8Th4 cuboctahedra. In the second Eu site, Eu(2) is bonded to four equivalent Th(1) and eight equivalent Eu(1) atoms to form EuEu8Th4 cuboctahedra that share corners with four equivalent Eu(2)Eu8Th4 cuboctahedra, corners with eight equivalent Th(1)Eu12 cuboctahedra, edges with eight equivalent Eu(2)Eu8Th4 cuboctahedra, edges with sixteen equivalent Eu(1)Eu8Th4 cuboctahedra, faces with four equivalent Eu(2)Eu8Th4 cuboctahedra, faces with six equivalent Th(1)Eu12 cuboctahedra, and faces with eight equivalent Eu(1)Eu8Th4 cuboctahedra. is represented by the CIF file [CIF]
data_Eu3Th
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.591
_cell_length_b   6.591
_cell_length_c   6.591
_cell_angle_alpha   132.063
_cell_angle_beta   132.063
_cell_angle_gamma   70.129
_symmetry_Int_Tables_number   1
_cell_volume   154.683
_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
  Eu  Eu0  1  0.750  0.250  0.500  1.0
  Eu  Eu1  1  0.250  0.750  0.500  1.0
  Eu  Eu2  1  0.500  0.500  0.000  1.0
  Th  Th3  1  0.000  0.000  0.000  1.0
[/CIF]
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The compound described by ThEu3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Th(1) is bonded to four equivalent Eu(2) and eight equivalent Eu(1) atoms to form ThEu12 cuboctahedra that share corners with four equivalent Th(1)Eu12 cuboctahedra, corners with eight equivalent Eu(2)Eu8Th4 cuboctahedra, edges with eight equivalent Th(1)Eu12 cuboctahedra, edges with sixteen equivalent Eu(1)Eu8Th4 cuboctahedra, faces with four equivalent Th(1)Eu12 cuboctahedra, faces with six equivalent Eu(2)Eu8Th4 cuboctahedra, and faces with eight equivalent Eu(1)Eu8Th4 cuboctahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent Th(1), four equivalent Eu(1), and four equivalent Eu(2) atoms to form EuEu8Th4 cuboctahedra that share corners with twelve equivalent Eu(1)Eu8Th4 cuboctahedra, edges with eight equivalent Th(1)Eu12 cuboctahedra, edges with eight equivalent Eu(1)Eu8Th4 cuboctahedra, edges with eight equivalent Eu(2)Eu8Th4 cuboctahedra, faces with four equivalent Th(1)Eu12 cuboctahedra, faces with four equivalent Eu(2)Eu8Th4 cuboctahedra, and faces with ten equivalent Eu(1)Eu8Th4 cuboctahedra. In the second Eu site, Eu(2) is bonded to four equivalent Th(1) and eight equivalent Eu(1) atoms to form EuEu8Th4 cuboctahedra that share corners with four equivalent Eu(2)Eu8Th4 cuboctahedra, corners with eight equivalent Th(1)Eu12 cuboctahedra, edges with eight equivalent Eu(2)Eu8Th4 cuboctahedra, edges with sixteen equivalent Eu(1)Eu8Th4 cuboctahedra, faces with four equivalent Eu(2)Eu8Th4 cuboctahedra, faces with six equivalent Th(1)Eu12 cuboctahedra, and faces with eight equivalent Eu(1)Eu8Th4 cuboctahedra. is represented by the CIF file [CIF]
data_Eu3Th
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.591
_cell_length_b   6.591
_cell_length_c   6.591
_cell_angle_alpha   132.063
_cell_angle_beta   132.063
_cell_angle_gamma   70.129
_symmetry_Int_Tables_number   1
_cell_volume   154.683
_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
  Eu  Eu0  1  0.750  0.250  0.500  1.0
  Eu  Eu1  1  0.250  0.750  0.500  1.0
  Eu  Eu2  1  0.500  0.500  0.000  1.0
  Th  Th3  1  0.000  0.000  0.000  1.0
[/CIF]
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