The structure described by MgY2 is beta-derived structured and crystallizes in the monoclinic C2/c space group. Mg(1) is bonded to two equivalent Mg(1) and ten Y(1,1) atoms to form distorted MgY10Mg2 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with eight Y(1,1)Y7Mg5 cuboctahedra; edges with ten equivalent Mg(1)Y10Mg2 cuboctahedra; faces with four equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with sixteen Y(1,1)Y7Mg5 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra. In the second Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.016
_cell_length_b   6.016
_cell_length_c   6.673
_cell_angle_alpha   61.955
_cell_angle_beta   61.955
_cell_angle_gamma   60.233
_symmetry_Int_Tables_number   1
_cell_volume   175.941
_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  0.237  0.424  0.745  1.0
  Y  Y1  1  0.576  0.763  0.755  1.0
  Y  Y2  1  0.424  0.237  0.245  1.0
  Y  Y3  1  0.763  0.576  0.255  1.0
  Mg  Mg4  1  0.084  0.916  0.250  1.0
  Mg  Mg5  1  0.916  0.084  0.750  1.0
[/CIF]
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The structure described by MgY2 is beta-derived structured and crystallizes in the monoclinic C2/c space group. Mg(1) is bonded to two equivalent Mg(1) and ten Y(1,1) atoms to form distorted MgY10Mg2 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with eight Y(1,1)Y7Mg5 cuboctahedra; edges with ten equivalent Mg(1)Y10Mg2 cuboctahedra; faces with four equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with sixteen Y(1,1)Y7Mg5 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra. In the second Y site, Y(1) is bonded to five equivalent Mg(1) and seven Y(1,1) atoms to form YY7Mg5 cuboctahedra that share corners with six equivalent Mg(1)Y10Mg2 cuboctahedra; corners with twelve Y(1,1)Y7Mg5 cuboctahedra; edges with four equivalent Mg(1)Y10Mg2 cuboctahedra; edges with fourteen Y(1,1)Y7Mg5 cuboctahedra; faces with eight equivalent Mg(1)Y10Mg2 cuboctahedra; and faces with twelve Y(1,1)Y7Mg5 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2Mg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.016
_cell_length_b   6.016
_cell_length_c   6.673
_cell_angle_alpha   61.955
_cell_angle_beta   61.955
_cell_angle_gamma   60.233
_symmetry_Int_Tables_number   1
_cell_volume   175.941
_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  0.237  0.424  0.745  1.0
  Y  Y1  1  0.576  0.763  0.755  1.0
  Y  Y2  1  0.424  0.237  0.245  1.0
  Y  Y3  1  0.763  0.576  0.255  1.0
  Mg  Mg4  1  0.084  0.916  0.250  1.0
  Mg  Mg5  1  0.916  0.084  0.750  1.0
[/CIF]
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