The compound described by RbMg14Ce crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded to two equivalent Mg(7); four Mg(3,3,3,3); four Mg(5,5); and two equivalent Ce(1) atoms to form RbCe2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra; corners with six equivalent Rb(1)Ce2Mg10 cuboctahedra; corners with eight equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; faces with two equivalent Ce(1)Rb2Mg10 cuboctahedra; faces with four Mg(5,5)RbCeMg10 cuboctahedra; and faces with six equivalent Mg(6)CeMg11 cuboctahedra. There are eleven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2); two equivalent Mg(6); four equivalent Mg(4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Ce2Mg10 cuboctahedra; corners with six equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with four equivalent Mg(6)CeMg11 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; faces with two equivalent Ce(1)Rb2Mg10 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1); two equivalent Mg(7); four equivalent Mg(4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Ce(1)Rb2Mg10 cuboctahedra; corners with six equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Rb(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; faces with four Mg(5,5)RbCeMg10 cuboctahedra; and faces with six equivalent Mg(6)CeMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1); two equivalent Mg(3); two Mg(5,5); two equivalent Mg(6); two equivalent Mg(7); and two equivalent Ce(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1); two equivalent Mg(2); two equivalent Mg(4); two Mg(5,5); two equivalent Mg(6); and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Ce2Mg10 cuboctahedra; corners with four equivalent Ce(1)Rb2Mg10 cuboctahedra; corners with six equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CeMg11 cuboctahedra; edges with four equivalent Mg(5)RbCeMg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; and faces with eight Mg(5,5)RbCeMg10 cuboctahedra. In the fifth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Ce(1) atoms. In the sixth Mg site, Mg(5) is bonded to one Rb(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Ce(1) atom to form distorted MgRbCeMg10 cuboctahedra that share corners with four equivalent Mg(6)CeMg11 cuboctahedra; corners with ten Mg(5,5)RbCeMg10 cuboctahedra; edges with two equivalent Rb(1)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(6)CeMg11 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Mg(5)RbCeMg10 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra;  a faceface with one Rb(1)Ce2Mg10 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra;  a faceface with one Mg(2)Mg12 cuboctahedra;  a faceface with one Ce(1)Rb2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; and faces with four equivalent Mg(5)RbCeMg10 cuboctahedra. In the seventh Mg site, Mg(5) is bonded to one Rb(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Ce(1) atom to form distorted MgRbCeMg10 cuboctahedra that share corners with four equivalent Mg(6)CeMg11 cuboctahedra; corners with ten equivalent Mg(5)RbCeMg10 cuboctahedra; edges with two equivalent Rb(1)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(6)CeMg11 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Mg(5)RbCeMg10 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra;  a faceface with one Rb(1)Ce2Mg10 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra;  a faceface with one Mg(2)Mg12 cuboctahedra;  a faceface with one Ce(1)Rb2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. In the eighth Mg site, Mg(6) is bonded to one Mg(1); two Mg(3,3); two equivalent Mg(4); two equivalent Mg(7); four Mg(5,5); and one Ce(1) atom to form distorted MgCeMg11 cuboctahedra that share corners with six equivalent Mg(6)CeMg11 cuboctahedra; corners with eight Mg(5,5)RbCeMg10 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with four Mg(5,5)RbCeMg10 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra;  a faceface with one Ce(1)Rb2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with three equivalent Rb(1)Ce2Mg10 cuboctahedra; faces with three equivalent Mg(2)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. In the ninth Mg site, Mg(7) is bonded in a 12-coordinate geometry to one Rb(1); one Mg(2); two Mg(3,3); two equivalent Mg(4); two equivalent Mg(6); and four Mg(5,5) atoms. In the tenth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Ce(1) atoms. In the eleventh Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1); two equivalent Mg(3); two Mg(5,5); two equivalent Mg(6); two equivalent Mg(7); and two equivalent Ce(1) atoms. Ce(1) is bonded to two equivalent Rb(1); two equivalent Mg(6); four Mg(3,3,3,3); and four Mg(5,5) atoms to form CeRb2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Ce(1)Rb2Mg10 cuboctahedra; corners with eight equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Rb(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(6)CeMg11 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Rb(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. is represented by the CIF file [CIF]
data_RbCeMg14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.691
_cell_length_b   6.644
_cell_length_c   10.753
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.766
_symmetry_Int_Tables_number   1
_cell_volume   414.990
_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
  Rb  Rb0  1  0.169  0.834  0.125  1.0
  Ce  Ce1  1  0.179  0.339  0.125  1.0
  Mg  Mg2  1  0.160  0.330  0.625  1.0
  Mg  Mg3  1  0.163  0.832  0.625  1.0
  Mg  Mg4  1  0.668  0.329  0.125  1.0
  Mg  Mg5  1  0.669  0.333  0.625  1.0
  Mg  Mg6  1  0.668  0.839  0.125  1.0
  Mg  Mg7  1  0.669  0.836  0.625  1.0
  Mg  Mg8  1  0.338  0.175  0.394  1.0
  Mg  Mg9  1  0.338  0.175  0.856  1.0
  Mg  Mg10  1  0.338  0.663  0.394  1.0
  Mg  Mg11  1  0.338  0.663  0.856  1.0
  Mg  Mg12  1  0.832  0.166  0.377  1.0
  Mg  Mg13  1  0.832  0.166  0.873  1.0
  Mg  Mg14  1  0.820  0.660  0.385  1.0
  Mg  Mg15  1  0.820  0.660  0.865  1.0
[/CIF]
.
The compound described by RbMg14Ce crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded to two equivalent Mg(7); four Mg(3,3,3,3); four Mg(5,5); and two equivalent Ce(1) atoms to form RbCe2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra; corners with six equivalent Rb(1)Ce2Mg10 cuboctahedra; corners with eight equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; faces with two equivalent Ce(1)Rb2Mg10 cuboctahedra; faces with four Mg(5,5)RbCeMg10 cuboctahedra; and faces with six equivalent Mg(6)CeMg11 cuboctahedra. There are eleven inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(2); two equivalent Mg(6); four equivalent Mg(4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Ce2Mg10 cuboctahedra; corners with six equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with four equivalent Mg(6)CeMg11 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; faces with two equivalent Ce(1)Rb2Mg10 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(1); two equivalent Mg(7); four equivalent Mg(4); and four Mg(5,5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Ce(1)Rb2Mg10 cuboctahedra; corners with six equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Rb(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; faces with four Mg(5,5)RbCeMg10 cuboctahedra; and faces with six equivalent Mg(6)CeMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1); two equivalent Mg(3); two Mg(5,5); two equivalent Mg(6); two equivalent Mg(7); and two equivalent Ce(1) atoms. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1); two equivalent Mg(2); two equivalent Mg(4); two Mg(5,5); two equivalent Mg(6); and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Ce2Mg10 cuboctahedra; corners with four equivalent Ce(1)Rb2Mg10 cuboctahedra; corners with six equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with four equivalent Mg(6)CeMg11 cuboctahedra; edges with four equivalent Mg(5)RbCeMg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; faces with two equivalent Mg(2)Mg12 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; and faces with eight Mg(5,5)RbCeMg10 cuboctahedra. In the fifth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Ce(1) atoms. In the sixth Mg site, Mg(5) is bonded to one Rb(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Ce(1) atom to form distorted MgRbCeMg10 cuboctahedra that share corners with four equivalent Mg(6)CeMg11 cuboctahedra; corners with ten Mg(5,5)RbCeMg10 cuboctahedra; edges with two equivalent Rb(1)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(6)CeMg11 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Mg(5)RbCeMg10 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra;  a faceface with one Rb(1)Ce2Mg10 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra;  a faceface with one Mg(2)Mg12 cuboctahedra;  a faceface with one Ce(1)Rb2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; and faces with four equivalent Mg(5)RbCeMg10 cuboctahedra. In the seventh Mg site, Mg(5) is bonded to one Rb(1), one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and one Ce(1) atom to form distorted MgRbCeMg10 cuboctahedra that share corners with four equivalent Mg(6)CeMg11 cuboctahedra; corners with ten equivalent Mg(5)RbCeMg10 cuboctahedra; edges with two equivalent Rb(1)Ce2Mg10 cuboctahedra; edges with two equivalent Mg(6)CeMg11 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Mg(2)Mg12 cuboctahedra; edges with two equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Mg(5)RbCeMg10 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra;  a faceface with one Rb(1)Ce2Mg10 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra;  a faceface with one Mg(2)Mg12 cuboctahedra;  a faceface with one Ce(1)Rb2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with four equivalent Mg(4)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. In the eighth Mg site, Mg(6) is bonded to one Mg(1); two Mg(3,3); two equivalent Mg(4); two equivalent Mg(7); four Mg(5,5); and one Ce(1) atom to form distorted MgCeMg11 cuboctahedra that share corners with six equivalent Mg(6)CeMg11 cuboctahedra; corners with eight Mg(5,5)RbCeMg10 cuboctahedra; edges with two equivalent Mg(1)Mg12 cuboctahedra; edges with two equivalent Ce(1)Rb2Mg10 cuboctahedra; edges with four equivalent Mg(4)Mg12 cuboctahedra; edges with four Mg(5,5)RbCeMg10 cuboctahedra;  a faceface with one Mg(1)Mg12 cuboctahedra;  a faceface with one Ce(1)Rb2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(4)Mg12 cuboctahedra; faces with three equivalent Rb(1)Ce2Mg10 cuboctahedra; faces with three equivalent Mg(2)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. In the ninth Mg site, Mg(7) is bonded in a 12-coordinate geometry to one Rb(1); one Mg(2); two Mg(3,3); two equivalent Mg(4); two equivalent Mg(6); and four Mg(5,5) atoms. In the tenth Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Ce(1) atoms. In the eleventh Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Rb(1); two equivalent Mg(3); two Mg(5,5); two equivalent Mg(6); two equivalent Mg(7); and two equivalent Ce(1) atoms. Ce(1) is bonded to two equivalent Rb(1); two equivalent Mg(6); four Mg(3,3,3,3); and four Mg(5,5) atoms to form CeRb2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Ce(1)Rb2Mg10 cuboctahedra; corners with eight equivalent Mg(4)Mg12 cuboctahedra; edges with two equivalent Rb(1)Ce2Mg10 cuboctahedra; edges with four equivalent Mg(6)CeMg11 cuboctahedra; edges with eight Mg(5,5)RbCeMg10 cuboctahedra; faces with two equivalent Rb(1)Ce2Mg10 cuboctahedra; faces with two equivalent Mg(6)CeMg11 cuboctahedra; faces with two equivalent Mg(1)Mg12 cuboctahedra; and faces with four Mg(5,5)RbCeMg10 cuboctahedra. is represented by the CIF file [CIF]
data_RbCeMg14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.691
_cell_length_b   6.644
_cell_length_c   10.753
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.766
_symmetry_Int_Tables_number   1
_cell_volume   414.990
_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
  Rb  Rb0  1  0.169  0.834  0.125  1.0
  Ce  Ce1  1  0.179  0.339  0.125  1.0
  Mg  Mg2  1  0.160  0.330  0.625  1.0
  Mg  Mg3  1  0.163  0.832  0.625  1.0
  Mg  Mg4  1  0.668  0.329  0.125  1.0
  Mg  Mg5  1  0.669  0.333  0.625  1.0
  Mg  Mg6  1  0.668  0.839  0.125  1.0
  Mg  Mg7  1  0.669  0.836  0.625  1.0
  Mg  Mg8  1  0.338  0.175  0.394  1.0
  Mg  Mg9  1  0.338  0.175  0.856  1.0
  Mg  Mg10  1  0.338  0.663  0.394  1.0
  Mg  Mg11  1  0.338  0.663  0.856  1.0
  Mg  Mg12  1  0.832  0.166  0.377  1.0
  Mg  Mg13  1  0.832  0.166  0.873  1.0
  Mg  Mg14  1  0.820  0.660  0.385  1.0
  Mg  Mg15  1  0.820  0.660  0.865  1.0
[/CIF]
.