The crystal structure described by Eu is alpha La structured and crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to three equivalent Eu(2), three equivalent Eu(3), and six equivalent Eu(1) atoms to form a mixture of corner, face, and edge-sharing EuEu12 cuboctahedra. In the second Eu site, Eu(2) is bonded to six equivalent Eu(1) and six equivalent Eu(2) atoms to form a mixture of corner, face, and edge-sharing EuEu12 cuboctahedra. In the third Eu site, Eu(3) is bonded to six equivalent Eu(1) and six equivalent Eu(3) atoms to form a mixture of corner, face, and edge-sharing EuEu12 cuboctahedra. is represented by the CIF file [CIF]
data_Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.983
_cell_length_b   3.983
_cell_length_c   12.766
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   175.402
_cell_formula_units_Z   4
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  0.000  0.000  1.000  1.0
  Eu  Eu1  1  0.333  0.667  0.250  1.0
  Eu  Eu2  1  0.000  0.000  0.500  1.0
  Eu  Eu3  1  0.667  0.333  0.750  1.0
[/CIF]
.
The crystal structure described by Eu is alpha La structured and crystallizes in the hexagonal P-6m2 space group. There are three inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to three equivalent Eu(2), three equivalent Eu(3), and six equivalent Eu(1) atoms to form a mixture of corner, face, and edge-sharing EuEu12 cuboctahedra. In the second Eu site, Eu(2) is bonded to six equivalent Eu(1) and six equivalent Eu(2) atoms to form a mixture of corner, face, and edge-sharing EuEu12 cuboctahedra. In the third Eu site, Eu(3) is bonded to six equivalent Eu(1) and six equivalent Eu(3) atoms to form a mixture of corner, face, and edge-sharing EuEu12 cuboctahedra. is represented by the CIF file [CIF]
data_Eu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.983
_cell_length_b   3.983
_cell_length_c   12.766
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   175.402
_cell_formula_units_Z   4
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  0.000  0.000  1.000  1.0
  Eu  Eu1  1  0.333  0.667  0.250  1.0
  Eu  Eu2  1  0.000  0.000  0.500  1.0
  Eu  Eu3  1  0.667  0.333  0.750  1.0
[/CIF]
.