The structure described by MgY is beta-derived structured and crystallizes in the monoclinic C2 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), three equivalent Mg(1), three equivalent Y(1), and four equivalent Y(2) atoms to form distorted MgY7Mg5 cuboctahedra that share corners with six equivalent Y(1)Y4Mg8 cuboctahedra, corners with twelve equivalent Mg(1)Y7Mg5 cuboctahedra, edges with four equivalent Mg(2)Y8Mg4 cuboctahedra, edges with six equivalent Mg(1)Y7Mg5 cuboctahedra, edges with eight equivalent Y(2)Y5Mg7 cuboctahedra, faces with four equivalent Mg(1)Y7Mg5 cuboctahedra, faces with four equivalent Mg(2)Y8Mg4 cuboctahedra, faces with four equivalent Y(1)Y4Mg8 cuboctahedra, and faces with eight equivalent Y(2)Y5Mg7 cuboctahedra. In the second Mg site, Mg(2) is bonded to four equivalent Mg(1), two equivalent Y(1), and six equivalent Y(2) atoms to form distorted MgY8Mg4 cuboctahedra that share corners with six equivalent Mg(2)Y8Mg4 cuboctahedra, corners with twelve equivalent Y(2)Y5Mg7 cuboctahedra, edges with four equivalent Y(1)Y4Mg8 cuboctahedra, edges with six equivalent Mg(2)Y8Mg4 cuboctahedra, edges with eight equivalent Mg(1)Y7Mg5 cuboctahedra, faces with four equivalent Y(1)Y4Mg8 cuboctahedra, faces with eight equivalent Mg(1)Y7Mg5 cuboctahedra, and faces with eight equivalent Y(2)Y5Mg7 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent Mg(2), six equivalent Mg(1), and four equivalent Y(2) atoms to form YY4Mg8 cuboctahedra that share corners with six equivalent Y(1)Y4Mg8 cuboctahedra, corners with twelve equivalent Mg(1)Y7Mg5 cuboctahedra, edges with four equivalent Mg(2)Y8Mg4 cuboctahedra, edges with six equivalent Y(1)Y4Mg8 cuboctahedra, edges with eight equivalent Y(2)Y5Mg7 cuboctahedra, faces with four equivalent Mg(2)Y8Mg4 cuboctahedra, faces with eight equivalent Mg(1)Y7Mg5 cuboctahedra, and faces with eight equivalent Y(2)Y5Mg7 cuboctahedra. In the second Y site, Y(2) is bonded to three equivalent Mg(2), four equivalent Mg(1), two equivalent Y(1), and three equivalent Y(2) atoms to form distorted YY5Mg7 cuboctahedra that share corners with six equivalent Mg(2)Y8Mg4 cuboctahedra, corners with twelve equivalent Y(2)Y5Mg7 cuboctahedra, edges with four equivalent Y(1)Y4Mg8 cuboctahedra, edges with six equivalent Y(2)Y5Mg7 cuboctahedra, edges with eight equivalent Mg(1)Y7Mg5 cuboctahedra, faces with four equivalent Mg(2)Y8Mg4 cuboctahedra, faces with four equivalent Y(1)Y4Mg8 cuboctahedra, faces with four equivalent Y(2)Y5Mg7 cuboctahedra, and faces with eight equivalent Mg(1)Y7Mg5 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_YMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.853
_cell_length_b   5.853
_cell_length_c   6.484
_cell_angle_alpha   64.475
_cell_angle_beta   64.475
_cell_angle_gamma   60.488
_symmetry_Int_Tables_number   1
_cell_volume   167.558
_cell_formula_units_Z   3
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  0.353  0.647  0.000  1.0
  Y  Y1  1  0.829  0.845  0.488  1.0
  Y  Y2  1  0.155  0.171  0.512  1.0
  Mg  Mg3  1  0.000  0.334  0.004  1.0
  Mg  Mg4  1  0.666  1.000  0.996  1.0
  Mg  Mg5  1  0.497  0.503  0.500  1.0
[/CIF]
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The structure described by MgY is beta-derived structured and crystallizes in the monoclinic C2 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2), three equivalent Mg(1), three equivalent Y(1), and four equivalent Y(2) atoms to form distorted MgY7Mg5 cuboctahedra that share corners with six equivalent Y(1)Y4Mg8 cuboctahedra, corners with twelve equivalent Mg(1)Y7Mg5 cuboctahedra, edges with four equivalent Mg(2)Y8Mg4 cuboctahedra, edges with six equivalent Mg(1)Y7Mg5 cuboctahedra, edges with eight equivalent Y(2)Y5Mg7 cuboctahedra, faces with four equivalent Mg(1)Y7Mg5 cuboctahedra, faces with four equivalent Mg(2)Y8Mg4 cuboctahedra, faces with four equivalent Y(1)Y4Mg8 cuboctahedra, and faces with eight equivalent Y(2)Y5Mg7 cuboctahedra. In the second Mg site, Mg(2) is bonded to four equivalent Mg(1), two equivalent Y(1), and six equivalent Y(2) atoms to form distorted MgY8Mg4 cuboctahedra that share corners with six equivalent Mg(2)Y8Mg4 cuboctahedra, corners with twelve equivalent Y(2)Y5Mg7 cuboctahedra, edges with four equivalent Y(1)Y4Mg8 cuboctahedra, edges with six equivalent Mg(2)Y8Mg4 cuboctahedra, edges with eight equivalent Mg(1)Y7Mg5 cuboctahedra, faces with four equivalent Y(1)Y4Mg8 cuboctahedra, faces with eight equivalent Mg(1)Y7Mg5 cuboctahedra, and faces with eight equivalent Y(2)Y5Mg7 cuboctahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to two equivalent Mg(2), six equivalent Mg(1), and four equivalent Y(2) atoms to form YY4Mg8 cuboctahedra that share corners with six equivalent Y(1)Y4Mg8 cuboctahedra, corners with twelve equivalent Mg(1)Y7Mg5 cuboctahedra, edges with four equivalent Mg(2)Y8Mg4 cuboctahedra, edges with six equivalent Y(1)Y4Mg8 cuboctahedra, edges with eight equivalent Y(2)Y5Mg7 cuboctahedra, faces with four equivalent Mg(2)Y8Mg4 cuboctahedra, faces with eight equivalent Mg(1)Y7Mg5 cuboctahedra, and faces with eight equivalent Y(2)Y5Mg7 cuboctahedra. In the second Y site, Y(2) is bonded to three equivalent Mg(2), four equivalent Mg(1), two equivalent Y(1), and three equivalent Y(2) atoms to form distorted YY5Mg7 cuboctahedra that share corners with six equivalent Mg(2)Y8Mg4 cuboctahedra, corners with twelve equivalent Y(2)Y5Mg7 cuboctahedra, edges with four equivalent Y(1)Y4Mg8 cuboctahedra, edges with six equivalent Y(2)Y5Mg7 cuboctahedra, edges with eight equivalent Mg(1)Y7Mg5 cuboctahedra, faces with four equivalent Mg(2)Y8Mg4 cuboctahedra, faces with four equivalent Y(1)Y4Mg8 cuboctahedra, faces with four equivalent Y(2)Y5Mg7 cuboctahedra, and faces with eight equivalent Mg(1)Y7Mg5 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_YMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.853
_cell_length_b   5.853
_cell_length_c   6.484
_cell_angle_alpha   64.475
_cell_angle_beta   64.475
_cell_angle_gamma   60.488
_symmetry_Int_Tables_number   1
_cell_volume   167.558
_cell_formula_units_Z   3
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  0.353  0.647  0.000  1.0
  Y  Y1  1  0.829  0.845  0.488  1.0
  Y  Y2  1  0.155  0.171  0.512  1.0
  Mg  Mg3  1  0.000  0.334  0.004  1.0
  Mg  Mg4  1  0.666  1.000  0.996  1.0
  Mg  Mg5  1  0.497  0.503  0.500  1.0
[/CIF]
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