The structure described by RbMg14Co crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Co(1) atoms to form RbMg10Co2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Rb(1)Mg10Co2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, and faces with two equivalent Mg(2)Mg12 cuboctahedra. There are seven 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 equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Mg10Co2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with four equivalent Mg(4)Mg12 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 equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Rb(1)Mg10Co2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, and faces with four equivalent Mg(4)Mg12 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 1-coordinate geometry to two equivalent Rb(1), two equivalent Mg(5), two equivalent Mg(7), and one Co(1) atom. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form distorted MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Mg10Co2 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, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with two equivalent Mg(4)Mg12 cuboctahedra. In the fifth Mg site, Mg(5) is bonded in a 12-coordinate geometry 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 Co(1) atom. In the sixth Mg site, Mg(6) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Co(1) atom. In the seventh Mg site, Mg(7) is bonded in a 12-coordinate geometry to one Rb(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), and four equivalent Mg(5) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), two equivalent Mg(6), and four equivalent Mg(5) atoms. is represented by the CIF file [CIF]
data_RbMg14Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.544
_cell_length_b   6.416
_cell_length_c   10.396
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.352
_symmetry_Int_Tables_number   1
_cell_volume   380.471
_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  0.117  0.809  0.125  1.0
  Mg  Mg1  1  0.165  0.333  0.625  1.0
  Mg  Mg2  1  0.175  0.837  0.625  1.0
  Mg  Mg3  1  0.617  0.317  0.125  1.0
  Mg  Mg4  1  0.666  0.327  0.625  1.0
  Mg  Mg5  1  0.617  0.800  0.125  1.0
  Mg  Mg6  1  0.666  0.839  0.625  1.0
  Mg  Mg7  1  0.342  0.182  0.380  1.0
  Mg  Mg8  1  0.342  0.182  0.870  1.0
  Mg  Mg9  1  0.342  0.660  0.380  1.0
  Mg  Mg10  1  0.342  0.660  0.870  1.0
  Mg  Mg11  1  0.860  0.180  0.346  1.0
  Mg  Mg12  1  0.860  0.180  0.904  1.0
  Mg  Mg13  1  0.827  0.663  0.398  1.0
  Mg  Mg14  1  0.827  0.663  0.852  1.0
  Co  Co15  1  0.236  0.368  0.125  1.0
[/CIF]
.
The structure described by RbMg14Co crystallizes in the orthorhombic Amm2 space group. Rb(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Co(1) atoms to form RbMg10Co2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Rb(1)Mg10Co2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, and faces with two equivalent Mg(2)Mg12 cuboctahedra. There are seven 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 equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Mg10Co2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with four equivalent Mg(4)Mg12 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 equivalent Mg(5) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Rb(1)Mg10Co2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, and faces with four equivalent Mg(4)Mg12 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 1-coordinate geometry to two equivalent Rb(1), two equivalent Mg(5), two equivalent Mg(7), and one Co(1) atom. In the fourth Mg site, Mg(4) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(4), two equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form distorted MgMg12 cuboctahedra that share corners with four equivalent Rb(1)Mg10Co2 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, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with two equivalent Mg(4)Mg12 cuboctahedra. In the fifth Mg site, Mg(5) is bonded in a 12-coordinate geometry 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 Co(1) atom. In the sixth Mg site, Mg(6) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Co(1) atom. In the seventh Mg site, Mg(7) is bonded in a 12-coordinate geometry to one Rb(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), and four equivalent Mg(5) atoms. Co(1) is bonded in a 10-coordinate geometry to two equivalent Rb(1), two equivalent Mg(3), two equivalent Mg(6), and four equivalent Mg(5) atoms. is represented by the CIF file [CIF]
data_RbMg14Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.544
_cell_length_b   6.416
_cell_length_c   10.396
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.352
_symmetry_Int_Tables_number   1
_cell_volume   380.471
_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  0.117  0.809  0.125  1.0
  Mg  Mg1  1  0.165  0.333  0.625  1.0
  Mg  Mg2  1  0.175  0.837  0.625  1.0
  Mg  Mg3  1  0.617  0.317  0.125  1.0
  Mg  Mg4  1  0.666  0.327  0.625  1.0
  Mg  Mg5  1  0.617  0.800  0.125  1.0
  Mg  Mg6  1  0.666  0.839  0.625  1.0
  Mg  Mg7  1  0.342  0.182  0.380  1.0
  Mg  Mg8  1  0.342  0.182  0.870  1.0
  Mg  Mg9  1  0.342  0.660  0.380  1.0
  Mg  Mg10  1  0.342  0.660  0.870  1.0
  Mg  Mg11  1  0.860  0.180  0.346  1.0
  Mg  Mg12  1  0.860  0.180  0.904  1.0
  Mg  Mg13  1  0.827  0.663  0.398  1.0
  Mg  Mg14  1  0.827  0.663  0.852  1.0
  Co  Co15  1  0.236  0.368  0.125  1.0
[/CIF]
.