The structure described by CeMg2 is alpha Samarium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to nine equivalent Mg(1) and three equivalent Ce(1) atoms to form MgCe3Mg9 cuboctahedra that share corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, faces with seven equivalent Ce(1)Ce6Mg6 cuboctahedra, and faces with thirteen equivalent Mg(1)Ce3Mg9 cuboctahedra. Ce(1) is bonded to six equivalent Mg(1) and six equivalent Ce(1) atoms to form CeCe6Mg6 cuboctahedra that share corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, faces with six equivalent Ce(1)Ce6Mg6 cuboctahedra, and faces with fourteen equivalent Mg(1)Ce3Mg9 cuboctahedra. is represented by the CIF file [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.112
_cell_length_b   3.112
_cell_length_c   17.188
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   144.145
_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
  Ce  Ce0  1  0.333  0.667  0.750  1.0
  Ce  Ce1  1  0.667  0.333  0.250  1.0
  Mg  Mg2  1  0.667  0.333  0.923  1.0
  Mg  Mg3  1  0.667  0.333  0.577  1.0
  Mg  Mg4  1  0.333  0.667  0.423  1.0
  Mg  Mg5  1  0.333  0.667  0.077  1.0
[/CIF]
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The structure described by CeMg2 is alpha Samarium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to nine equivalent Mg(1) and three equivalent Ce(1) atoms to form MgCe3Mg9 cuboctahedra that share corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, faces with seven equivalent Ce(1)Ce6Mg6 cuboctahedra, and faces with thirteen equivalent Mg(1)Ce3Mg9 cuboctahedra. Ce(1) is bonded to six equivalent Mg(1) and six equivalent Ce(1) atoms to form CeCe6Mg6 cuboctahedra that share corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, corners with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with twelve equivalent Mg(1)Ce3Mg9 cuboctahedra, faces with six equivalent Ce(1)Ce6Mg6 cuboctahedra, and faces with fourteen equivalent Mg(1)Ce3Mg9 cuboctahedra. is represented by the CIF file [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.112
_cell_length_b   3.112
_cell_length_c   17.188
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   144.145
_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
  Ce  Ce0  1  0.333  0.667  0.750  1.0
  Ce  Ce1  1  0.667  0.333  0.250  1.0
  Mg  Mg2  1  0.667  0.333  0.923  1.0
  Mg  Mg3  1  0.667  0.333  0.577  1.0
  Mg  Mg4  1  0.333  0.667  0.423  1.0
  Mg  Mg5  1  0.333  0.667  0.077  1.0
[/CIF]
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