The compound described by Mg2Yb is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(2) is bonded to six equivalent Mg(1) and six equivalent Yb(1) atoms to form a mixture of corner, face, and edge-sharing MgYb6Mg6 cuboctahedra. In the second Mg site, Mg(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), and six equivalent Yb(1) atoms to form a mixture of corner, face, and edge-sharing MgYb6Mg6 cuboctahedra. Yb(1) is bonded in a 16-coordinate geometry to three equivalent Mg(2), nine equivalent Mg(1), and four equivalent Yb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_YbMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.230
_cell_length_b   6.230
_cell_length_c   9.804
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.003
_symmetry_Int_Tables_number   1
_cell_volume   329.543
_cell_formula_units_Z   4
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
  Yb  Yb0  1  0.333  0.667  0.938  1.0
  Yb  Yb1  1  0.667  0.333  0.438  1.0
  Yb  Yb2  1  0.667  0.333  0.062  1.0
  Yb  Yb3  1  0.333  0.667  0.562  1.0
  Mg  Mg4  1  0.832  0.664  0.750  1.0
  Mg  Mg5  1  0.168  0.832  0.250  1.0
  Mg  Mg6  1  0.664  0.832  0.250  1.0
  Mg  Mg7  1  0.336  0.168  0.750  1.0
  Mg  Mg8  1  1.000  1.000  0.000  1.0
  Mg  Mg9  1  0.000  1.000  0.500  1.0
  Mg  Mg10  1  0.168  0.336  0.250  1.0
  Mg  Mg11  1  0.832  0.168  0.750  1.0
[/CIF]
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The compound described by Mg2Yb is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Mg sites. In the first Mg site, Mg(2) is bonded to six equivalent Mg(1) and six equivalent Yb(1) atoms to form a mixture of corner, face, and edge-sharing MgYb6Mg6 cuboctahedra. In the second Mg site, Mg(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), and six equivalent Yb(1) atoms to form a mixture of corner, face, and edge-sharing MgYb6Mg6 cuboctahedra. Yb(1) is bonded in a 16-coordinate geometry to three equivalent Mg(2), nine equivalent Mg(1), and four equivalent Yb(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_YbMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.230
_cell_length_b   6.230
_cell_length_c   9.804
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.003
_symmetry_Int_Tables_number   1
_cell_volume   329.543
_cell_formula_units_Z   4
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
  Yb  Yb0  1  0.333  0.667  0.938  1.0
  Yb  Yb1  1  0.667  0.333  0.438  1.0
  Yb  Yb2  1  0.667  0.333  0.062  1.0
  Yb  Yb3  1  0.333  0.667  0.562  1.0
  Mg  Mg4  1  0.832  0.664  0.750  1.0
  Mg  Mg5  1  0.168  0.832  0.250  1.0
  Mg  Mg6  1  0.664  0.832  0.250  1.0
  Mg  Mg7  1  0.336  0.168  0.750  1.0
  Mg  Mg8  1  1.000  1.000  0.000  1.0
  Mg  Mg9  1  0.000  1.000  0.500  1.0
  Mg  Mg10  1  0.168  0.336  0.250  1.0
  Mg  Mg11  1  0.832  0.168  0.750  1.0
[/CIF]
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