The crystal structure described by Mg6CeY crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Ce(1)Y2Mg10 cuboctahedra; corners with four equivalent Y(1)Ce2Mg10 cuboctahedra; corners with ten Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Ce(1)Y2Mg10 cuboctahedra; edges with two equivalent Y(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(2,2)Ce2Y2Mg8 cuboctahedra. In the second Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Ce(1)Y2Mg10 cuboctahedra; corners with four equivalent Y(1)Ce2Mg10 cuboctahedra; corners with ten Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Ce(1)Y2Mg10 cuboctahedra; edges with two equivalent Y(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(2,2)Ce2Y2Mg8 cuboctahedra. In the third Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(2,2,2); and two equivalent Y(1) atoms to form MgY2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with six equivalent Mg(3)Y2Mg10 cuboctahedra; corners with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; edges with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Ce(1)Y2Mg10 cuboctahedra. In the fifth Mg site, Mg(4) is bonded to two equivalent Mg(3); four Mg(1,1); four Mg(2,2,2); and two equivalent Ce(1) atoms to form MgCe2Mg10 cuboctahedra that share corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with six equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Y(1)Ce2Mg10 cuboctahedra. In the sixth Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(2,2)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra. In the seventh Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(2,2)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra. Ce(1) is bonded to two equivalent Mg(4); four Mg(1,1); four equivalent Mg(2); and two equivalent Y(1) atoms to form CeY2Mg10 cuboctahedra that share corners with four equivalent Y(1)Ce2Mg10 cuboctahedra; corners with six equivalent Ce(1)Y2Mg10 cuboctahedra; corners with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Y(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(3)Y2Mg10 cuboctahedra. Y(1) is bonded to two equivalent Mg(3); four Mg(1,1); four Mg(2,2); and two equivalent Ce(1) atoms to form YCe2Mg10 cuboctahedra that share corners with four equivalent Ce(1)Y2Mg10 cuboctahedra; corners with six equivalent Y(1)Ce2Mg10 cuboctahedra; corners with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; edges with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four Mg(2,2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(4)Ce2Mg10 cuboctahedra. is represented by the CIF card [CIF]
data_CeYMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.326
_cell_length_b   6.684
_cell_length_c   6.684
_cell_angle_alpha   119.675
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   206.726
_cell_formula_units_Z   1
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  0.500  0.664  0.336  1.0
  Mg  Mg1  1  0.500  0.669  0.834  1.0
  Mg  Mg2  1  0.500  0.166  0.331  1.0
  Mg  Mg3  1  1.000  0.832  0.668  1.0
  Mg  Mg4  1  0.000  0.332  0.168  1.0
  Mg  Mg5  1  0.000  0.337  0.663  1.0
  Mg  Mg6  1  0.000  0.837  0.163  1.0
  Y  Y7  1  0.500  0.163  0.837  1.0
[/CIF]
.
The crystal structure described by Mg6CeY crystallizes in the orthorhombic Amm2 space group. There are seven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Ce(1)Y2Mg10 cuboctahedra; corners with four equivalent Y(1)Ce2Mg10 cuboctahedra; corners with ten Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Ce(1)Y2Mg10 cuboctahedra; edges with two equivalent Y(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(2,2)Ce2Y2Mg8 cuboctahedra. In the second Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Ce(1)Y2Mg10 cuboctahedra; corners with four equivalent Y(1)Ce2Mg10 cuboctahedra; corners with ten Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Ce(1)Y2Mg10 cuboctahedra; edges with two equivalent Y(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(2,2)Ce2Y2Mg8 cuboctahedra. In the third Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(4); four Mg(1,1); four Mg(2,2,2); and two equivalent Y(1) atoms to form MgY2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with six equivalent Mg(3)Y2Mg10 cuboctahedra; corners with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; edges with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Ce(1)Y2Mg10 cuboctahedra. In the fifth Mg site, Mg(4) is bonded to two equivalent Mg(3); four Mg(1,1); four Mg(2,2,2); and two equivalent Ce(1) atoms to form MgCe2Mg10 cuboctahedra that share corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with six equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Y(1)Ce2Mg10 cuboctahedra. In the sixth Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(2,2)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra. In the seventh Mg site, Mg(2) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Ce(1), and two equivalent Y(1) atoms to form distorted MgCe2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Ce2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Mg(1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(2,2)Ce2Y2Mg8 cuboctahedra; and faces with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra. Ce(1) is bonded to two equivalent Mg(4); four Mg(1,1); four equivalent Mg(2); and two equivalent Y(1) atoms to form CeY2Mg10 cuboctahedra that share corners with four equivalent Y(1)Ce2Mg10 cuboctahedra; corners with six equivalent Ce(1)Y2Mg10 cuboctahedra; corners with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Y(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(4)Ce2Mg10 cuboctahedra; edges with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(4)Ce2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four equivalent Mg(2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(3)Y2Mg10 cuboctahedra. Y(1) is bonded to two equivalent Mg(3); four Mg(1,1); four Mg(2,2); and two equivalent Ce(1) atoms to form YCe2Mg10 cuboctahedra that share corners with four equivalent Ce(1)Y2Mg10 cuboctahedra; corners with six equivalent Y(1)Ce2Mg10 cuboctahedra; corners with eight Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with two equivalent Ce(1)Y2Mg10 cuboctahedra; edges with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; edges with eight Mg(2,2,2)Ce2Y2Mg8 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Ce(1)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Ce2Mg10 cuboctahedra; faces with four Mg(1,1)Ce2Y2Mg8 cuboctahedra; faces with four Mg(2,2)Ce2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(4)Ce2Mg10 cuboctahedra. is represented by the CIF card [CIF]
data_CeYMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.326
_cell_length_b   6.684
_cell_length_c   6.684
_cell_angle_alpha   119.675
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   206.726
_cell_formula_units_Z   1
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  0.500  0.664  0.336  1.0
  Mg  Mg1  1  0.500  0.669  0.834  1.0
  Mg  Mg2  1  0.500  0.166  0.331  1.0
  Mg  Mg3  1  1.000  0.832  0.668  1.0
  Mg  Mg4  1  0.000  0.332  0.168  1.0
  Mg  Mg5  1  0.000  0.337  0.663  1.0
  Mg  Mg6  1  0.000  0.837  0.163  1.0
  Y  Y7  1  0.500  0.163  0.837  1.0
[/CIF]
.