The material described by LaY crystallizes in the hexagonal P6_3/mmc space group. La(1) is bonded to six equivalent La(1) and six equivalent Y(1) atoms to form LaLa6Y6 cuboctahedra that share corners with twelve equivalent La(1)La6Y6 cuboctahedra, edges with twelve equivalent La(1)La6Y6 cuboctahedra, edges with twelve equivalent Y(1)La6Y6 cuboctahedra, faces with six equivalent La(1)La6Y6 cuboctahedra, and faces with twelve equivalent Y(1)La6Y6 cuboctahedra. Y(1) is bonded to six equivalent La(1) and six equivalent Y(1) atoms to form YLa6Y6 cuboctahedra that share corners with eighteen equivalent Y(1)La6Y6 cuboctahedra, edges with six equivalent Y(1)La6Y6 cuboctahedra, edges with twelve equivalent La(1)La6Y6 cuboctahedra, faces with eight equivalent Y(1)La6Y6 cuboctahedra, and faces with twelve equivalent La(1)La6Y6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaY
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.710
_cell_length_b   3.710
_cell_length_c   11.910
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   141.938
_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  0.333  0.667  0.750  1.0
  La  La1  1  0.667  0.333  0.250  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Y  Y3  1  0.000  0.000  0.500  1.0
[/CIF]
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The material described by LaY crystallizes in the hexagonal P6_3/mmc space group. La(1) is bonded to six equivalent La(1) and six equivalent Y(1) atoms to form LaLa6Y6 cuboctahedra that share corners with twelve equivalent La(1)La6Y6 cuboctahedra, edges with twelve equivalent La(1)La6Y6 cuboctahedra, edges with twelve equivalent Y(1)La6Y6 cuboctahedra, faces with six equivalent La(1)La6Y6 cuboctahedra, and faces with twelve equivalent Y(1)La6Y6 cuboctahedra. Y(1) is bonded to six equivalent La(1) and six equivalent Y(1) atoms to form YLa6Y6 cuboctahedra that share corners with eighteen equivalent Y(1)La6Y6 cuboctahedra, edges with six equivalent Y(1)La6Y6 cuboctahedra, edges with twelve equivalent La(1)La6Y6 cuboctahedra, faces with eight equivalent Y(1)La6Y6 cuboctahedra, and faces with twelve equivalent La(1)La6Y6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaY
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.710
_cell_length_b   3.710
_cell_length_c   11.910
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   141.938
_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  0.333  0.667  0.750  1.0
  La  La1  1  0.667  0.333  0.250  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Y  Y3  1  0.000  0.000  0.500  1.0
[/CIF]
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