The structure described by BaEu3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Ba(1) is bonded to twelve Eu(1,1) atoms to form BaEu12 cuboctahedra that share corners with six equivalent Ba(1)Eu12 cuboctahedra; corners with twelve Eu(1,1)Ba4Eu8 cuboctahedra; edges with eighteen Eu(1,1)Ba4Eu8 cuboctahedra; faces with eight equivalent Ba(1)Eu12 cuboctahedra; and faces with twelve Eu(1,1)Ba4Eu8 cuboctahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent Ba(1) and eight Eu(1,1) atoms to form distorted EuBa4Eu8 cuboctahedra that share corners with four equivalent Ba(1)Eu12 cuboctahedra; corners with fourteen Eu(1,1)Ba4Eu8 cuboctahedra; edges with six equivalent Ba(1)Eu12 cuboctahedra; edges with twelve Eu(1,1)Ba4Eu8 cuboctahedra; faces with four equivalent Ba(1)Eu12 cuboctahedra; and faces with sixteen Eu(1,1)Ba4Eu8 cuboctahedra. In the second Eu site, Eu(1) is bonded to four equivalent Ba(1) and eight Eu(1,1) atoms to form distorted EuBa4Eu8 cuboctahedra that share corners with four equivalent Ba(1)Eu12 cuboctahedra; corners with fourteen Eu(1,1)Ba4Eu8 cuboctahedra; edges with six equivalent Ba(1)Eu12 cuboctahedra; edges with twelve Eu(1,1)Ba4Eu8 cuboctahedra; faces with four equivalent Ba(1)Eu12 cuboctahedra; and faces with sixteen Eu(1,1)Ba4Eu8 cuboctahedra. is represented by the CIF file [CIF]
data_BaEu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.249
_cell_length_b   8.249
_cell_length_c   6.658
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   392.351
_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
  Ba  Ba0  1  0.333  0.667  0.750  1.0
  Ba  Ba1  1  0.667  0.333  0.250  1.0
  Eu  Eu2  1  0.164  0.329  0.250  1.0
  Eu  Eu3  1  0.671  0.836  0.250  1.0
  Eu  Eu4  1  0.164  0.836  0.250  1.0
  Eu  Eu5  1  0.836  0.671  0.750  1.0
  Eu  Eu6  1  0.329  0.164  0.750  1.0
  Eu  Eu7  1  0.836  0.164  0.750  1.0
[/CIF]
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The structure described by BaEu3 is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. Ba(1) is bonded to twelve Eu(1,1) atoms to form BaEu12 cuboctahedra that share corners with six equivalent Ba(1)Eu12 cuboctahedra; corners with twelve Eu(1,1)Ba4Eu8 cuboctahedra; edges with eighteen Eu(1,1)Ba4Eu8 cuboctahedra; faces with eight equivalent Ba(1)Eu12 cuboctahedra; and faces with twelve Eu(1,1)Ba4Eu8 cuboctahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to four equivalent Ba(1) and eight Eu(1,1) atoms to form distorted EuBa4Eu8 cuboctahedra that share corners with four equivalent Ba(1)Eu12 cuboctahedra; corners with fourteen Eu(1,1)Ba4Eu8 cuboctahedra; edges with six equivalent Ba(1)Eu12 cuboctahedra; edges with twelve Eu(1,1)Ba4Eu8 cuboctahedra; faces with four equivalent Ba(1)Eu12 cuboctahedra; and faces with sixteen Eu(1,1)Ba4Eu8 cuboctahedra. In the second Eu site, Eu(1) is bonded to four equivalent Ba(1) and eight Eu(1,1) atoms to form distorted EuBa4Eu8 cuboctahedra that share corners with four equivalent Ba(1)Eu12 cuboctahedra; corners with fourteen Eu(1,1)Ba4Eu8 cuboctahedra; edges with six equivalent Ba(1)Eu12 cuboctahedra; edges with twelve Eu(1,1)Ba4Eu8 cuboctahedra; faces with four equivalent Ba(1)Eu12 cuboctahedra; and faces with sixteen Eu(1,1)Ba4Eu8 cuboctahedra. is represented by the CIF file [CIF]
data_BaEu3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.249
_cell_length_b   8.249
_cell_length_c   6.658
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   392.351
_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
  Ba  Ba0  1  0.333  0.667  0.750  1.0
  Ba  Ba1  1  0.667  0.333  0.250  1.0
  Eu  Eu2  1  0.164  0.329  0.250  1.0
  Eu  Eu3  1  0.671  0.836  0.250  1.0
  Eu  Eu4  1  0.164  0.836  0.250  1.0
  Eu  Eu5  1  0.836  0.671  0.750  1.0
  Eu  Eu6  1  0.329  0.164  0.750  1.0
  Eu  Eu7  1  0.836  0.164  0.750  1.0
[/CIF]
.