The crystal structure described by Mg2Y is beta-derived structured and crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to seven equivalent Mg(1) and five equivalent Y(1) atoms to form MgY5Mg7 cuboctahedra that share corners with nine equivalent Mg(1)Y5Mg7 cuboctahedra, corners with nine equivalent Y(1)Y2Mg10 cuboctahedra, edges with four equivalent Y(1)Y2Mg10 cuboctahedra, edges with fourteen equivalent Mg(1)Y5Mg7 cuboctahedra, faces with seven equivalent Y(1)Y2Mg10 cuboctahedra, and faces with thirteen equivalent Mg(1)Y5Mg7 cuboctahedra. Y(1) is bonded to ten equivalent Mg(1) and two equivalent Y(1) atoms to form YY2Mg10 cuboctahedra that share corners with eighteen equivalent Mg(1)Y5Mg7 cuboctahedra, edges with eight equivalent Mg(1)Y5Mg7 cuboctahedra, edges with ten equivalent Y(1)Y2Mg10 cuboctahedra, faces with six equivalent Y(1)Y2Mg10 cuboctahedra, and faces with fourteen equivalent Mg(1)Y5Mg7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_YMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.784
_cell_length_b   5.784
_cell_length_c   5.443
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.107
_symmetry_Int_Tables_number   1
_cell_volume   157.518
_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  0.683  0.683  0.750  1.0
  Y  Y1  1  0.317  0.317  0.250  1.0
  Mg  Mg2  1  0.997  0.333  0.750  1.0
  Mg  Mg3  1  0.333  0.997  0.750  1.0
  Mg  Mg4  1  0.667  0.003  0.250  1.0
  Mg  Mg5  1  0.003  0.667  0.250  1.0
[/CIF]
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The crystal structure described by Mg2Y is beta-derived structured and crystallizes in the orthorhombic Cmcm space group. Mg(1) is bonded to seven equivalent Mg(1) and five equivalent Y(1) atoms to form MgY5Mg7 cuboctahedra that share corners with nine equivalent Mg(1)Y5Mg7 cuboctahedra, corners with nine equivalent Y(1)Y2Mg10 cuboctahedra, edges with four equivalent Y(1)Y2Mg10 cuboctahedra, edges with fourteen equivalent Mg(1)Y5Mg7 cuboctahedra, faces with seven equivalent Y(1)Y2Mg10 cuboctahedra, and faces with thirteen equivalent Mg(1)Y5Mg7 cuboctahedra. Y(1) is bonded to ten equivalent Mg(1) and two equivalent Y(1) atoms to form YY2Mg10 cuboctahedra that share corners with eighteen equivalent Mg(1)Y5Mg7 cuboctahedra, edges with eight equivalent Mg(1)Y5Mg7 cuboctahedra, edges with ten equivalent Y(1)Y2Mg10 cuboctahedra, faces with six equivalent Y(1)Y2Mg10 cuboctahedra, and faces with fourteen equivalent Mg(1)Y5Mg7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_YMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.784
_cell_length_b   5.784
_cell_length_c   5.443
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.107
_symmetry_Int_Tables_number   1
_cell_volume   157.518
_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  0.683  0.683  0.750  1.0
  Y  Y1  1  0.317  0.317  0.250  1.0
  Mg  Mg2  1  0.997  0.333  0.750  1.0
  Mg  Mg3  1  0.333  0.997  0.750  1.0
  Mg  Mg4  1  0.667  0.003  0.250  1.0
  Mg  Mg5  1  0.003  0.667  0.250  1.0
[/CIF]
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