The crystal structure described by BaMg14Sb crystallizes in the orthorhombic Amm2 space group. Ba(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sb(1) atoms to form BaMg10Sb2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Ba(1)Mg10Sb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Sb(1)Ba2Mg10 cuboctahedra, edges with four equivalent Mg(6)BaMg11 cuboctahedra, faces with two equivalent Mg(6)BaMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, and faces with two equivalent Sb(1)Ba2Mg10 cuboctahedra. There are eight 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)Ba2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)BaMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Ba(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(6)BaMg11 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 four equivalent Ba(1)Mg10Sb2 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, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Ba2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(6)BaMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Ba(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Sb(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 equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Ba(1)Mg10Sb2 cuboctahedra, corners with four equivalent Sb(1)Ba2Mg10 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)BaMg11 cuboctahedra, faces with two equivalent Mg(6)BaMg11 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 Ba(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 Sb(1) atom. In the sixth Mg site, Mg(6) is bonded to one Ba(1); one Mg(1); two equivalent Mg(3); two equivalent Mg(4); two equivalent Mg(7); and four Mg(5,5) atoms to form distorted MgBaMg11 cuboctahedra that share corners with six equivalent Mg(6)BaMg11 cuboctahedra, edges with two equivalent Ba(1)Mg10Sb2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra,  a faceface with one Ba(1)Mg10Sb2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)BaMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, and faces with three equivalent Sb(1)Ba2Mg10 cuboctahedra. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2); two equivalent Mg(3); two equivalent Mg(4); two equivalent Mg(6); four Mg(5,5); and one Sb(1) atom. In the eighth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Ba(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 Sb(1) atom. Sb(1) is bonded to two equivalent Ba(1), two equivalent Mg(7), four equivalent Mg(3), and four equivalent Mg(5) atoms to form SbBa2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Sb(1)Ba2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Ba(1)Mg10Sb2 cuboctahedra, faces with two equivalent Ba(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with six equivalent Mg(6)BaMg11 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaMg14Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.642
_cell_length_b   6.610
_cell_length_c   10.587
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.841
_symmetry_Int_Tables_number   1
_cell_volume   403.110
_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
  Ba  Ba0  1  0.167  0.334  0.125  1.0
  Mg  Mg1  1  0.166  0.333  0.625  1.0
  Mg  Mg2  1  0.162  0.831  0.625  1.0
  Mg  Mg3  1  0.664  0.325  0.125  1.0
  Mg  Mg4  1  0.669  0.338  0.625  1.0
  Mg  Mg5  1  0.664  0.839  0.125  1.0
  Mg  Mg6  1  0.669  0.831  0.625  1.0
  Mg  Mg7  1  0.340  0.161  0.390  1.0
  Mg  Mg8  1  0.340  0.161  0.860  1.0
  Mg  Mg9  1  0.340  0.679  0.390  1.0
  Mg  Mg10  1  0.340  0.679  0.860  1.0
  Mg  Mg11  1  0.820  0.160  0.390  1.0
  Mg  Mg12  1  0.820  0.160  0.860  1.0
  Mg  Mg13  1  0.830  0.665  0.372  1.0
  Mg  Mg14  1  0.830  0.665  0.878  1.0
  Sb  Sb15  1  0.180  0.840  0.125  1.0
[/CIF]
.
The crystal structure described by BaMg14Sb crystallizes in the orthorhombic Amm2 space group. Ba(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sb(1) atoms to form BaMg10Sb2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Ba(1)Mg10Sb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Sb(1)Ba2Mg10 cuboctahedra, edges with four equivalent Mg(6)BaMg11 cuboctahedra, faces with two equivalent Mg(6)BaMg11 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, and faces with two equivalent Sb(1)Ba2Mg10 cuboctahedra. There are eight 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)Ba2Mg10 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)BaMg11 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Ba(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(6)BaMg11 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 four equivalent Ba(1)Mg10Sb2 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, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Ba2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, and faces with six equivalent Mg(6)BaMg11 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 12-coordinate geometry to two equivalent Ba(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Sb(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 equivalent Mg(5), two equivalent Mg(6), and two equivalent Mg(7) atoms to form MgMg12 cuboctahedra that share corners with four equivalent Ba(1)Mg10Sb2 cuboctahedra, corners with four equivalent Sb(1)Ba2Mg10 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)BaMg11 cuboctahedra, faces with two equivalent Mg(6)BaMg11 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 Ba(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 Sb(1) atom. In the sixth Mg site, Mg(6) is bonded to one Ba(1); one Mg(1); two equivalent Mg(3); two equivalent Mg(4); two equivalent Mg(7); and four Mg(5,5) atoms to form distorted MgBaMg11 cuboctahedra that share corners with six equivalent Mg(6)BaMg11 cuboctahedra, edges with two equivalent Ba(1)Mg10Sb2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra,  a faceface with one Ba(1)Mg10Sb2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(6)BaMg11 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, and faces with three equivalent Sb(1)Ba2Mg10 cuboctahedra. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2); two equivalent Mg(3); two equivalent Mg(4); two equivalent Mg(6); four Mg(5,5); and one Sb(1) atom. In the eighth Mg site, Mg(5) is bonded in a 12-coordinate geometry to one Ba(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 Sb(1) atom. Sb(1) is bonded to two equivalent Ba(1), two equivalent Mg(7), four equivalent Mg(3), and four equivalent Mg(5) atoms to form SbBa2Mg10 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Sb(1)Ba2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Ba(1)Mg10Sb2 cuboctahedra, faces with two equivalent Ba(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with six equivalent Mg(6)BaMg11 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_BaMg14Sb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.642
_cell_length_b   6.610
_cell_length_c   10.587
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.841
_symmetry_Int_Tables_number   1
_cell_volume   403.110
_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
  Ba  Ba0  1  0.167  0.334  0.125  1.0
  Mg  Mg1  1  0.166  0.333  0.625  1.0
  Mg  Mg2  1  0.162  0.831  0.625  1.0
  Mg  Mg3  1  0.664  0.325  0.125  1.0
  Mg  Mg4  1  0.669  0.338  0.625  1.0
  Mg  Mg5  1  0.664  0.839  0.125  1.0
  Mg  Mg6  1  0.669  0.831  0.625  1.0
  Mg  Mg7  1  0.340  0.161  0.390  1.0
  Mg  Mg8  1  0.340  0.161  0.860  1.0
  Mg  Mg9  1  0.340  0.679  0.390  1.0
  Mg  Mg10  1  0.340  0.679  0.860  1.0
  Mg  Mg11  1  0.820  0.160  0.390  1.0
  Mg  Mg12  1  0.820  0.160  0.860  1.0
  Mg  Mg13  1  0.830  0.665  0.372  1.0
  Mg  Mg14  1  0.830  0.665  0.878  1.0
  Sb  Sb15  1  0.180  0.840  0.125  1.0
[/CIF]
.