The material described by CeMg2 is Magnesium-derived structured and crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), six equivalent Mg(2), and four equivalent Ce(1) atoms to form MgCe4Mg8 cuboctahedra that share corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(1)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with three equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with seven equivalent Mg(2)Ce2Mg10 cuboctahedra, edges with eight equivalent Mg(1)Ce4Mg8 cuboctahedra, faces with six equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with six equivalent Mg(1)Ce4Mg8 cuboctahedra, and faces with eight equivalent Ce(1)Ce6Mg6 cuboctahedra. In the second Mg site, Mg(2) is bonded to four equivalent Mg(2), six equivalent Mg(1), and two equivalent Ce(1) atoms to form MgCe2Mg10 cuboctahedra that share corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(1)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with seven equivalent Mg(1)Ce4Mg8 cuboctahedra, edges with eleven equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with four equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with six equivalent Mg(1)Ce4Mg8 cuboctahedra, and faces with ten equivalent Mg(2)Ce2Mg10 cuboctahedra. Ce(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), and six equivalent Ce(1) atoms to form CeCe6Mg6 cuboctahedra that share corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(1)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with three equivalent Mg(1)Ce4Mg8 cuboctahedra, edges with four equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with eleven equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with four equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with eight equivalent Mg(1)Ce4Mg8 cuboctahedra, and faces with eight equivalent Ce(1)Ce6Mg6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.064
_cell_length_b   9.064
_cell_length_c   5.139
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   160.099
_symmetry_Int_Tables_number   1
_cell_volume   143.705
_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  0.266  0.734  0.250  1.0
  Ce  Ce1  1  0.734  0.266  0.750  1.0
  Mg  Mg2  1  0.601  0.399  0.250  1.0
  Mg  Mg3  1  0.943  0.057  0.250  1.0
  Mg  Mg4  1  0.057  0.943  0.750  1.0
  Mg  Mg5  1  0.399  0.601  0.750  1.0
[/CIF]
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The material described by CeMg2 is Magnesium-derived structured and crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), six equivalent Mg(2), and four equivalent Ce(1) atoms to form MgCe4Mg8 cuboctahedra that share corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(1)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with three equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with seven equivalent Mg(2)Ce2Mg10 cuboctahedra, edges with eight equivalent Mg(1)Ce4Mg8 cuboctahedra, faces with six equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with six equivalent Mg(1)Ce4Mg8 cuboctahedra, and faces with eight equivalent Ce(1)Ce6Mg6 cuboctahedra. In the second Mg site, Mg(2) is bonded to four equivalent Mg(2), six equivalent Mg(1), and two equivalent Ce(1) atoms to form MgCe2Mg10 cuboctahedra that share corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(1)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with seven equivalent Mg(1)Ce4Mg8 cuboctahedra, edges with eleven equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with four equivalent Ce(1)Ce6Mg6 cuboctahedra, faces with six equivalent Mg(1)Ce4Mg8 cuboctahedra, and faces with ten equivalent Mg(2)Ce2Mg10 cuboctahedra. Ce(1) is bonded to two equivalent Mg(2), four equivalent Mg(1), and six equivalent Ce(1) atoms to form CeCe6Mg6 cuboctahedra that share corners with six equivalent Mg(2)Ce2Mg10 cuboctahedra, corners with six equivalent Mg(1)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with three equivalent Mg(1)Ce4Mg8 cuboctahedra, edges with four equivalent Ce(1)Ce6Mg6 cuboctahedra, edges with eleven equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with four equivalent Mg(2)Ce2Mg10 cuboctahedra, faces with eight equivalent Mg(1)Ce4Mg8 cuboctahedra, and faces with eight equivalent Ce(1)Ce6Mg6 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.064
_cell_length_b   9.064
_cell_length_c   5.139
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   160.099
_symmetry_Int_Tables_number   1
_cell_volume   143.705
_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  0.266  0.734  0.250  1.0
  Ce  Ce1  1  0.734  0.266  0.750  1.0
  Mg  Mg2  1  0.601  0.399  0.250  1.0
  Mg  Mg3  1  0.943  0.057  0.250  1.0
  Mg  Mg4  1  0.057  0.943  0.750  1.0
  Mg  Mg5  1  0.399  0.601  0.750  1.0
[/CIF]
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