The material described by Mg14NbSb 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(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 Sb(1)Mg10Nb2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Nb(1)Mg10Sb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(7)Mg11Sb 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 four equivalent Nb(1)Mg10Sb2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Mg10Nb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(6)Mg11Nb cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), two equivalent Nb(1), and two equivalent Sb(1) atoms to form distorted MgMg8Nb2Sb2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra, edges with four equivalent Mg(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, faces with two equivalent Nb(1)Mg10Sb2 cuboctahedra, faces with two equivalent Sb(1)Mg10Nb2 cuboctahedra, and faces with eight equivalent Mg(5)Mg10NbSb cuboctahedra. 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 MgMg12 cuboctahedra that share corners with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, corners with four equivalent Nb(1)Mg10Sb2 cuboctahedra, corners with four equivalent Sb(1)Mg10Nb2 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(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb 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, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, and faces with eight equivalent Mg(5)Mg10NbSb cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), one Nb(1), and one Sb(1) atom to form distorted MgMg10NbSb cuboctahedra that share corners with four equivalent Mg(6)Mg11Nb cuboctahedra, corners with four equivalent Mg(7)Mg11Sb cuboctahedra, corners with ten equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(6)Mg11Nb cuboctahedra, edges with two equivalent Mg(7)Mg11Sb 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(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Nb(1)Mg10Sb2 cuboctahedra,  a faceface with one Sb(1)Mg10Nb2 cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Nb(1) atom to form distorted MgMg11Nb cuboctahedra that share corners with four equivalent Mg(7)Mg11Sb cuboctahedra, corners with six equivalent Mg(6)Mg11Nb cuboctahedra, corners with eight equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(7)Mg11Sb cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with four equivalent Mg(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Nb(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent Sb(1)Mg10Nb2 cuboctahedra, and faces with four equivalent Mg(5)Mg10NbSb cuboctahedra. In the seventh Mg site, Mg(7) is bonded to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one Sb(1) atom to form distorted MgMg11Sb cuboctahedra that share corners with four equivalent Mg(6)Mg11Nb cuboctahedra, corners with six equivalent Mg(7)Mg11Sb cuboctahedra, corners with eight equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(6)Mg11Nb cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra, edges with four equivalent Mg(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Sb(1)Mg10Nb2 cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Nb(1)Mg10Sb2 cuboctahedra, and faces with four equivalent Mg(5)Mg10NbSb cuboctahedra. Nb(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sb(1) atoms to form NbMg10Sb2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Nb(1)Mg10Sb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Mg10Nb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, and faces with six equivalent Mg(7)Mg11Sb cuboctahedra. Sb(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Nb(1) atoms to form SbMg10Nb2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Sb(1)Mg10Nb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Nb(1)Mg10Sb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, and faces with six equivalent Mg(6)Mg11Nb cuboctahedra. is represented by the CIF card [CIF]
data_Mg14NbSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.334
_cell_length_b   6.235
_cell_length_c   10.278
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.484
_symmetry_Int_Tables_number   1
_cell_volume   353.337
_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
  Mg  Mg0  1  0.166  0.333  0.625  1.0
  Mg  Mg1  1  0.167  0.833  0.625  1.0
  Mg  Mg2  1  0.668  0.332  0.125  1.0
  Mg  Mg3  1  0.666  0.333  0.625  1.0
  Mg  Mg4  1  0.668  0.836  0.125  1.0
  Mg  Mg5  1  0.666  0.833  0.625  1.0
  Mg  Mg6  1  0.332  0.171  0.373  1.0
  Mg  Mg7  1  0.332  0.171  0.877  1.0
  Mg  Mg8  1  0.332  0.661  0.373  1.0
  Mg  Mg9  1  0.332  0.661  0.877  1.0
  Mg  Mg10  1  0.840  0.170  0.372  1.0
  Mg  Mg11  1  0.840  0.170  0.878  1.0
  Mg  Mg12  1  0.831  0.666  0.378  1.0
  Mg  Mg13  1  0.831  0.666  0.872  1.0
  Nb  Nb14  1  0.170  0.335  0.125  1.0
  Sb  Sb15  1  0.160  0.830  0.125  1.0
[/CIF]
.
The material described by Mg14NbSb 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(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 Sb(1)Mg10Nb2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Nb(1)Mg10Sb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(7)Mg11Sb 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 four equivalent Nb(1)Mg10Sb2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Mg10Nb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(6)Mg11Nb cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), two equivalent Nb(1), and two equivalent Sb(1) atoms to form distorted MgMg8Nb2Sb2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with four equivalent Mg(4)Mg12 cuboctahedra, corners with six equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra, edges with four equivalent Mg(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, faces with two equivalent Nb(1)Mg10Sb2 cuboctahedra, faces with two equivalent Sb(1)Mg10Nb2 cuboctahedra, and faces with eight equivalent Mg(5)Mg10NbSb cuboctahedra. 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 MgMg12 cuboctahedra that share corners with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, corners with four equivalent Nb(1)Mg10Sb2 cuboctahedra, corners with four equivalent Sb(1)Mg10Nb2 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(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb 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, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, and faces with eight equivalent Mg(5)Mg10NbSb cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Mg(1), one Mg(2), one Mg(3), one Mg(4), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), one Nb(1), and one Sb(1) atom to form distorted MgMg10NbSb cuboctahedra that share corners with four equivalent Mg(6)Mg11Nb cuboctahedra, corners with four equivalent Mg(7)Mg11Sb cuboctahedra, corners with ten equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(6)Mg11Nb cuboctahedra, edges with two equivalent Mg(7)Mg11Sb 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(3)Mg8Nb2Sb2 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Nb(1)Mg10Sb2 cuboctahedra,  a faceface with one Sb(1)Mg10Nb2 cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra. In the sixth Mg site, Mg(6) is bonded to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Nb(1) atom to form distorted MgMg11Nb cuboctahedra that share corners with four equivalent Mg(7)Mg11Sb cuboctahedra, corners with six equivalent Mg(6)Mg11Nb cuboctahedra, corners with eight equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(7)Mg11Sb cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with four equivalent Mg(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Nb(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, faces with three equivalent Sb(1)Mg10Nb2 cuboctahedra, and faces with four equivalent Mg(5)Mg10NbSb cuboctahedra. In the seventh Mg site, Mg(7) is bonded to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), four equivalent Mg(5), and one Sb(1) atom to form distorted MgMg11Sb cuboctahedra that share corners with four equivalent Mg(6)Mg11Nb cuboctahedra, corners with six equivalent Mg(7)Mg11Sb cuboctahedra, corners with eight equivalent Mg(5)Mg10NbSb cuboctahedra, edges with two equivalent Mg(6)Mg11Nb cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra, edges with four equivalent Mg(5)Mg10NbSb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Sb(1)Mg10Nb2 cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Nb(1)Mg10Sb2 cuboctahedra, and faces with four equivalent Mg(5)Mg10NbSb cuboctahedra. Nb(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sb(1) atoms to form NbMg10Sb2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Nb(1)Mg10Sb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Sb(1)Mg10Nb2 cuboctahedra, edges with four equivalent Mg(6)Mg11Nb cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(6)Mg11Nb cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Mg10Nb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, and faces with six equivalent Mg(7)Mg11Sb cuboctahedra. Sb(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Nb(1) atoms to form SbMg10Nb2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Sb(1)Mg10Nb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Nb(1)Mg10Sb2 cuboctahedra, edges with four equivalent Mg(7)Mg11Sb cuboctahedra, edges with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, edges with eight equivalent Mg(5)Mg10NbSb cuboctahedra, faces with two equivalent Mg(7)Mg11Sb cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Nb(1)Mg10Sb2 cuboctahedra, faces with four equivalent Mg(5)Mg10NbSb cuboctahedra, faces with four equivalent Mg(3)Mg8Nb2Sb2 cuboctahedra, and faces with six equivalent Mg(6)Mg11Nb cuboctahedra. is represented by the CIF card [CIF]
data_Mg14NbSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.334
_cell_length_b   6.235
_cell_length_c   10.278
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.484
_symmetry_Int_Tables_number   1
_cell_volume   353.337
_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
  Mg  Mg0  1  0.166  0.333  0.625  1.0
  Mg  Mg1  1  0.167  0.833  0.625  1.0
  Mg  Mg2  1  0.668  0.332  0.125  1.0
  Mg  Mg3  1  0.666  0.333  0.625  1.0
  Mg  Mg4  1  0.668  0.836  0.125  1.0
  Mg  Mg5  1  0.666  0.833  0.625  1.0
  Mg  Mg6  1  0.332  0.171  0.373  1.0
  Mg  Mg7  1  0.332  0.171  0.877  1.0
  Mg  Mg8  1  0.332  0.661  0.373  1.0
  Mg  Mg9  1  0.332  0.661  0.877  1.0
  Mg  Mg10  1  0.840  0.170  0.372  1.0
  Mg  Mg11  1  0.840  0.170  0.878  1.0
  Mg  Mg12  1  0.831  0.666  0.378  1.0
  Mg  Mg13  1  0.831  0.666  0.872  1.0
  Nb  Nb14  1  0.170  0.335  0.125  1.0
  Sb  Sb15  1  0.160  0.830  0.125  1.0
[/CIF]
.