The structure described by Mg2Y is Molybdenite structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to nine equivalent Mg(1) and three equivalent Y(1) atoms to form MgY3Mg9 cuboctahedra that share corners with six equivalent Y(1)Y6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, edges with six equivalent Y(1)Y6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, faces with seven equivalent Y(1)Y6Mg6 cuboctahedra, and faces with thirteen equivalent Mg(1)Y3Mg9 cuboctahedra. Y(1) is bonded to six equivalent Mg(1) and six equivalent Y(1) atoms to form YY6Mg6 cuboctahedra that share corners with six equivalent Y(1)Y6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, edges with six equivalent Y(1)Y6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, faces with six equivalent Y(1)Y6Mg6 cuboctahedra, and faces with fourteen equivalent Mg(1)Y3Mg9 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_YMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.332
_cell_length_b   3.332
_cell_length_c   16.709
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   160.674
_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
  Y  Y0  1  0.667  0.333  0.750  1.0
  Y  Y1  1  0.333  0.667  0.250  1.0
  Mg  Mg2  1  0.333  0.667  0.921  1.0
  Mg  Mg3  1  0.333  0.667  0.579  1.0
  Mg  Mg4  1  0.667  0.333  0.421  1.0
  Mg  Mg5  1  0.667  0.333  0.079  1.0
[/CIF]
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The structure described by Mg2Y is Molybdenite structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to nine equivalent Mg(1) and three equivalent Y(1) atoms to form MgY3Mg9 cuboctahedra that share corners with six equivalent Y(1)Y6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, edges with six equivalent Y(1)Y6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, faces with seven equivalent Y(1)Y6Mg6 cuboctahedra, and faces with thirteen equivalent Mg(1)Y3Mg9 cuboctahedra. Y(1) is bonded to six equivalent Mg(1) and six equivalent Y(1) atoms to form YY6Mg6 cuboctahedra that share corners with six equivalent Y(1)Y6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, edges with six equivalent Y(1)Y6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Y3Mg9 cuboctahedra, faces with six equivalent Y(1)Y6Mg6 cuboctahedra, and faces with fourteen equivalent Mg(1)Y3Mg9 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_YMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.332
_cell_length_b   3.332
_cell_length_c   16.709
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   160.674
_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
  Y  Y0  1  0.667  0.333  0.750  1.0
  Y  Y1  1  0.333  0.667  0.250  1.0
  Mg  Mg2  1  0.333  0.667  0.921  1.0
  Mg  Mg3  1  0.333  0.667  0.579  1.0
  Mg  Mg4  1  0.667  0.333  0.421  1.0
  Mg  Mg5  1  0.667  0.333  0.079  1.0
[/CIF]
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