The material described by CeMg2 is beta-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent Mg(1), five equivalent Mg(2), and three equivalent Ce(1) atoms to form MgCe3Mg9 cuboctahedra that share corners with six equivalent Mg(1)Ce3Mg9 cuboctahedra, corners with six equivalent Mg(2)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with five equivalent Mg(2)Ce4Mg8 cuboctahedra, edges with six equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with seven equivalent Ce(1)Ce5Mg7 cuboctahedra, faces with five equivalent Mg(1)Ce3Mg9 cuboctahedra, faces with seven equivalent Ce(1)Ce5Mg7 cuboctahedra, and faces with eight equivalent Mg(2)Ce4Mg8 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(2), five equivalent Mg(1), and four equivalent Ce(1) atoms to form MgCe4Mg8 cuboctahedra that share corners with six equivalent Mg(1)Ce3Mg9 cuboctahedra, corners with six equivalent Mg(2)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with four equivalent Mg(2)Ce4Mg8 cuboctahedra, edges with five equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with nine equivalent Ce(1)Ce5Mg7 cuboctahedra, faces with six equivalent Mg(2)Ce4Mg8 cuboctahedra, faces with six equivalent Ce(1)Ce5Mg7 cuboctahedra, and faces with eight equivalent Mg(1)Ce3Mg9 cuboctahedra. Ce(1) is bonded to three equivalent Mg(1), four equivalent Mg(2), and five equivalent Ce(1) atoms to form CeCe5Mg7 cuboctahedra that share corners with six equivalent Mg(1)Ce3Mg9 cuboctahedra, corners with six equivalent Mg(2)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with two equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with seven equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with nine equivalent Mg(2)Ce4Mg8 cuboctahedra, faces with six equivalent Mg(2)Ce4Mg8 cuboctahedra, faces with seven equivalent Mg(1)Ce3Mg9 cuboctahedra, and faces with seven equivalent Ce(1)Ce5Mg7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.925
_cell_length_b   5.925
_cell_length_c   8.284
_cell_angle_alpha   76.316
_cell_angle_beta   76.316
_cell_angle_gamma   32.115
_symmetry_Int_Tables_number   1
_cell_volume   149.868
_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  0.657  0.657  0.470  1.0
  Ce  Ce1  1  0.343  0.343  0.530  1.0
  Mg  Mg2  1  0.313  0.313  0.119  1.0
  Mg  Mg3  1  0.027  0.027  0.187  1.0
  Mg  Mg4  1  0.973  0.973  0.813  1.0
  Mg  Mg5  1  0.687  0.687  0.881  1.0
[/CIF]
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The material described by CeMg2 is beta-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent Mg(1), five equivalent Mg(2), and three equivalent Ce(1) atoms to form MgCe3Mg9 cuboctahedra that share corners with six equivalent Mg(1)Ce3Mg9 cuboctahedra, corners with six equivalent Mg(2)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with five equivalent Mg(2)Ce4Mg8 cuboctahedra, edges with six equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with seven equivalent Ce(1)Ce5Mg7 cuboctahedra, faces with five equivalent Mg(1)Ce3Mg9 cuboctahedra, faces with seven equivalent Ce(1)Ce5Mg7 cuboctahedra, and faces with eight equivalent Mg(2)Ce4Mg8 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(2), five equivalent Mg(1), and four equivalent Ce(1) atoms to form MgCe4Mg8 cuboctahedra that share corners with six equivalent Mg(1)Ce3Mg9 cuboctahedra, corners with six equivalent Mg(2)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with four equivalent Mg(2)Ce4Mg8 cuboctahedra, edges with five equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with nine equivalent Ce(1)Ce5Mg7 cuboctahedra, faces with six equivalent Mg(2)Ce4Mg8 cuboctahedra, faces with six equivalent Ce(1)Ce5Mg7 cuboctahedra, and faces with eight equivalent Mg(1)Ce3Mg9 cuboctahedra. Ce(1) is bonded to three equivalent Mg(1), four equivalent Mg(2), and five equivalent Ce(1) atoms to form CeCe5Mg7 cuboctahedra that share corners with six equivalent Mg(1)Ce3Mg9 cuboctahedra, corners with six equivalent Mg(2)Ce4Mg8 cuboctahedra, corners with six equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with two equivalent Ce(1)Ce5Mg7 cuboctahedra, edges with seven equivalent Mg(1)Ce3Mg9 cuboctahedra, edges with nine equivalent Mg(2)Ce4Mg8 cuboctahedra, faces with six equivalent Mg(2)Ce4Mg8 cuboctahedra, faces with seven equivalent Mg(1)Ce3Mg9 cuboctahedra, and faces with seven equivalent Ce(1)Ce5Mg7 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_CeMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.925
_cell_length_b   5.925
_cell_length_c   8.284
_cell_angle_alpha   76.316
_cell_angle_beta   76.316
_cell_angle_gamma   32.115
_symmetry_Int_Tables_number   1
_cell_volume   149.868
_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  0.657  0.657  0.470  1.0
  Ce  Ce1  1  0.343  0.343  0.530  1.0
  Mg  Mg2  1  0.313  0.313  0.119  1.0
  Mg  Mg3  1  0.027  0.027  0.187  1.0
  Mg  Mg4  1  0.973  0.973  0.813  1.0
  Mg  Mg5  1  0.687  0.687  0.881  1.0
[/CIF]
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