The crystal structure described by EuY3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded to four equivalent Y(2) and eight equivalent Y(1) atoms to form EuY12 cuboctahedra that share corners with four equivalent Eu(1)Y12 cuboctahedra, corners with eight equivalent Y(2)Eu4Y8 cuboctahedra, edges with eight equivalent Eu(1)Y12 cuboctahedra, edges with sixteen equivalent Y(1)Eu4Y8 cuboctahedra, faces with four equivalent Eu(1)Y12 cuboctahedra, faces with six equivalent Y(2)Eu4Y8 cuboctahedra, and faces with eight equivalent Y(1)Eu4Y8 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to four equivalent Eu(1), four equivalent Y(1), and four equivalent Y(2) atoms to form YEu4Y8 cuboctahedra that share corners with twelve equivalent Y(1)Eu4Y8 cuboctahedra, edges with eight equivalent Eu(1)Y12 cuboctahedra, edges with eight equivalent Y(1)Eu4Y8 cuboctahedra, edges with eight equivalent Y(2)Eu4Y8 cuboctahedra, faces with four equivalent Eu(1)Y12 cuboctahedra, faces with four equivalent Y(2)Eu4Y8 cuboctahedra, and faces with ten equivalent Y(1)Eu4Y8 cuboctahedra. In the second Y site, Y(2) is bonded to four equivalent Eu(1) and eight equivalent Y(1) atoms to form YEu4Y8 cuboctahedra that share corners with four equivalent Y(2)Eu4Y8 cuboctahedra, corners with eight equivalent Eu(1)Y12 cuboctahedra, edges with eight equivalent Y(2)Eu4Y8 cuboctahedra, edges with sixteen equivalent Y(1)Eu4Y8 cuboctahedra, faces with four equivalent Y(2)Eu4Y8 cuboctahedra, faces with six equivalent Eu(1)Y12 cuboctahedra, and faces with eight equivalent Y(1)Eu4Y8 cuboctahedra. is represented by the CIF file [CIF]
data_EuY3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.314
_cell_length_b   6.314
_cell_length_c   6.314
_cell_angle_alpha   131.875
_cell_angle_beta   131.875
_cell_angle_gamma   70.426
_symmetry_Int_Tables_number   1
_cell_volume   136.752
_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  0.000  0.000  0.000  1.0
  Y  Y1  1  0.750  0.250  0.500  1.0
  Y  Y2  1  0.250  0.750  0.500  1.0
  Y  Y3  1  0.500  0.500  0.000  1.0
[/CIF]
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The crystal structure described by EuY3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Eu(1) is bonded to four equivalent Y(2) and eight equivalent Y(1) atoms to form EuY12 cuboctahedra that share corners with four equivalent Eu(1)Y12 cuboctahedra, corners with eight equivalent Y(2)Eu4Y8 cuboctahedra, edges with eight equivalent Eu(1)Y12 cuboctahedra, edges with sixteen equivalent Y(1)Eu4Y8 cuboctahedra, faces with four equivalent Eu(1)Y12 cuboctahedra, faces with six equivalent Y(2)Eu4Y8 cuboctahedra, and faces with eight equivalent Y(1)Eu4Y8 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to four equivalent Eu(1), four equivalent Y(1), and four equivalent Y(2) atoms to form YEu4Y8 cuboctahedra that share corners with twelve equivalent Y(1)Eu4Y8 cuboctahedra, edges with eight equivalent Eu(1)Y12 cuboctahedra, edges with eight equivalent Y(1)Eu4Y8 cuboctahedra, edges with eight equivalent Y(2)Eu4Y8 cuboctahedra, faces with four equivalent Eu(1)Y12 cuboctahedra, faces with four equivalent Y(2)Eu4Y8 cuboctahedra, and faces with ten equivalent Y(1)Eu4Y8 cuboctahedra. In the second Y site, Y(2) is bonded to four equivalent Eu(1) and eight equivalent Y(1) atoms to form YEu4Y8 cuboctahedra that share corners with four equivalent Y(2)Eu4Y8 cuboctahedra, corners with eight equivalent Eu(1)Y12 cuboctahedra, edges with eight equivalent Y(2)Eu4Y8 cuboctahedra, edges with sixteen equivalent Y(1)Eu4Y8 cuboctahedra, faces with four equivalent Y(2)Eu4Y8 cuboctahedra, faces with six equivalent Eu(1)Y12 cuboctahedra, and faces with eight equivalent Y(1)Eu4Y8 cuboctahedra. is represented by the CIF file [CIF]
data_EuY3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.314
_cell_length_b   6.314
_cell_length_c   6.314
_cell_angle_alpha   131.875
_cell_angle_beta   131.875
_cell_angle_gamma   70.426
_symmetry_Int_Tables_number   1
_cell_volume   136.752
_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  0.000  0.000  0.000  1.0
  Y  Y1  1  0.750  0.250  0.500  1.0
  Y  Y2  1  0.250  0.750  0.500  1.0
  Y  Y3  1  0.500  0.500  0.000  1.0
[/CIF]
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