The crystal structure described by EuLa3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Eu(1) is bonded to twelve La(1,1) atoms to form EuLa12 cuboctahedra that share corners with six equivalent Eu(1)La12 cuboctahedra; corners with twelve equivalent La(1)La8Eu4 cuboctahedra; edges with eighteen La(1,1)La8Eu4 cuboctahedra; faces with eight equivalent Eu(1)La12 cuboctahedra; and faces with twelve La(1,1)La8Eu4 cuboctahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Eu(1) and eight equivalent La(1) atoms to form LaLa8Eu4 cuboctahedra that share corners with four equivalent Eu(1)La12 cuboctahedra; corners with fourteen La(1,1)La8Eu4 cuboctahedra; edges with six equivalent Eu(1)La12 cuboctahedra; edges with twelve equivalent La(1)La8Eu4 cuboctahedra; faces with four equivalent Eu(1)La12 cuboctahedra; and faces with sixteen La(1,1)La8Eu4 cuboctahedra. In the second La site, La(1) is bonded to four equivalent Eu(1) and eight La(1,1) atoms to form LaLa8Eu4 cuboctahedra that share corners with four equivalent Eu(1)La12 cuboctahedra; corners with fourteen La(1,1)La8Eu4 cuboctahedra; edges with six equivalent Eu(1)La12 cuboctahedra; edges with twelve La(1,1)La8Eu4 cuboctahedra; faces with four equivalent Eu(1)La12 cuboctahedra; and faces with sixteen La(1,1)La8Eu4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_La3Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.556
_cell_length_b   7.556
_cell_length_c   5.977
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   295.532
_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
  La  La0  1  0.164  0.327  0.250  1.0
  La  La1  1  0.673  0.836  0.250  1.0
  La  La2  1  0.164  0.836  0.250  1.0
  La  La3  1  0.836  0.673  0.750  1.0
  La  La4  1  0.327  0.164  0.750  1.0
  La  La5  1  0.836  0.164  0.750  1.0
  Eu  Eu6  1  0.333  0.667  0.750  1.0
  Eu  Eu7  1  0.667  0.333  0.250  1.0
[/CIF]
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The crystal structure described by EuLa3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Eu(1) is bonded to twelve La(1,1) atoms to form EuLa12 cuboctahedra that share corners with six equivalent Eu(1)La12 cuboctahedra; corners with twelve equivalent La(1)La8Eu4 cuboctahedra; edges with eighteen La(1,1)La8Eu4 cuboctahedra; faces with eight equivalent Eu(1)La12 cuboctahedra; and faces with twelve La(1,1)La8Eu4 cuboctahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Eu(1) and eight equivalent La(1) atoms to form LaLa8Eu4 cuboctahedra that share corners with four equivalent Eu(1)La12 cuboctahedra; corners with fourteen La(1,1)La8Eu4 cuboctahedra; edges with six equivalent Eu(1)La12 cuboctahedra; edges with twelve equivalent La(1)La8Eu4 cuboctahedra; faces with four equivalent Eu(1)La12 cuboctahedra; and faces with sixteen La(1,1)La8Eu4 cuboctahedra. In the second La site, La(1) is bonded to four equivalent Eu(1) and eight La(1,1) atoms to form LaLa8Eu4 cuboctahedra that share corners with four equivalent Eu(1)La12 cuboctahedra; corners with fourteen La(1,1)La8Eu4 cuboctahedra; edges with six equivalent Eu(1)La12 cuboctahedra; edges with twelve La(1,1)La8Eu4 cuboctahedra; faces with four equivalent Eu(1)La12 cuboctahedra; and faces with sixteen La(1,1)La8Eu4 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_La3Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.556
_cell_length_b   7.556
_cell_length_c   5.977
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   295.532
_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
  La  La0  1  0.164  0.327  0.250  1.0
  La  La1  1  0.673  0.836  0.250  1.0
  La  La2  1  0.164  0.836  0.250  1.0
  La  La3  1  0.836  0.673  0.750  1.0
  La  La4  1  0.327  0.164  0.750  1.0
  La  La5  1  0.836  0.164  0.750  1.0
  Eu  Eu6  1  0.333  0.667  0.750  1.0
  Eu  Eu7  1  0.667  0.333  0.250  1.0
[/CIF]
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