The structure described by CeMg crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent Mg(2), two equivalent Ce(2), and six equivalent Ce(1) atoms to form MgCe8Mg4 cuboctahedra that share edges with four equivalent Ce(2)Ce4Mg8 cuboctahedra, edges with six equivalent Mg(1)Ce8Mg4 cuboctahedra, faces with two equivalent Mg(1)Ce8Mg4 cuboctahedra, and faces with four equivalent Ce(2)Ce4Mg8 cuboctahedra. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), three equivalent Mg(2), three equivalent Ce(2), and four equivalent Ce(1) atoms. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 12-coordinate geometry to three equivalent Mg(1), four equivalent Mg(2), two equivalent Ce(2), and three equivalent Ce(1) atoms. In the second Ce site, Ce(2) is bonded to two equivalent Mg(1), six equivalent Mg(2), and four equivalent Ce(1) atoms to form CeCe4Mg8 cuboctahedra that share edges with four equivalent Mg(1)Ce8Mg4 cuboctahedra, edges with six equivalent Ce(2)Ce4Mg8 cuboctahedra, faces with two equivalent Ce(2)Ce4Mg8 cuboctahedra, and faces with four equivalent Mg(1)Ce8Mg4 cuboctahedra. is represented by the CIF file [CIF]
data_CeMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.331
_cell_length_b   5.754
_cell_length_c   5.754
_cell_angle_alpha   116.263
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   158.272
_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
  Ce  Ce0  1  1.000  0.029  0.306  1.0
  Ce  Ce1  1  1.000  0.306  0.029  1.0
  Ce  Ce2  1  0.500  0.339  0.339  1.0
  Mg  Mg3  1  0.000  0.670  0.670  1.0
  Mg  Mg4  1  0.500  0.989  0.668  1.0
  Mg  Mg5  1  0.500  0.668  0.989  1.0
[/CIF]
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The structure described by CeMg crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to four equivalent Mg(2), two equivalent Ce(2), and six equivalent Ce(1) atoms to form MgCe8Mg4 cuboctahedra that share edges with four equivalent Ce(2)Ce4Mg8 cuboctahedra, edges with six equivalent Mg(1)Ce8Mg4 cuboctahedra, faces with two equivalent Mg(1)Ce8Mg4 cuboctahedra, and faces with four equivalent Ce(2)Ce4Mg8 cuboctahedra. In the second Mg site, Mg(2) is bonded in a 12-coordinate geometry to two equivalent Mg(1), three equivalent Mg(2), three equivalent Ce(2), and four equivalent Ce(1) atoms. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 12-coordinate geometry to three equivalent Mg(1), four equivalent Mg(2), two equivalent Ce(2), and three equivalent Ce(1) atoms. In the second Ce site, Ce(2) is bonded to two equivalent Mg(1), six equivalent Mg(2), and four equivalent Ce(1) atoms to form CeCe4Mg8 cuboctahedra that share edges with four equivalent Mg(1)Ce8Mg4 cuboctahedra, edges with six equivalent Ce(2)Ce4Mg8 cuboctahedra, faces with two equivalent Ce(2)Ce4Mg8 cuboctahedra, and faces with four equivalent Mg(1)Ce8Mg4 cuboctahedra. is represented by the CIF file [CIF]
data_CeMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.331
_cell_length_b   5.754
_cell_length_c   5.754
_cell_angle_alpha   116.263
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   158.272
_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
  Ce  Ce0  1  1.000  0.029  0.306  1.0
  Ce  Ce1  1  1.000  0.306  0.029  1.0
  Ce  Ce2  1  0.500  0.339  0.339  1.0
  Mg  Mg3  1  0.000  0.670  0.670  1.0
  Mg  Mg4  1  0.500  0.989  0.668  1.0
  Mg  Mg5  1  0.500  0.668  0.989  1.0
[/CIF]
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