The material described by Mg14SnSb 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)Mg10Sn2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)Mg3SnSb cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Sn(1)Mg10Sb2 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 Sn(1)Mg10Sb2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)Mg3SnSb cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Mg10Sn2 cuboctahedra, and faces with four equivalent Mg(4)Mg12 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Sn(1) 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 Mg(5)Mg3SnSb cuboctahedra, corners with four equivalent Sn(1)Mg10Sb2 cuboctahedra, corners with four equivalent Sb(1)Mg10Sn2 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 eight equivalent Mg(5)Mg3SnSb 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 to one Mg(1), one Mg(2), one Mg(4), one Sn(1), and one Sb(1) atom to form distorted MgMg3SnSb cuboctahedra that share corners with two equivalent Mg(1)Mg12 cuboctahedra, corners with two equivalent Mg(2)Mg12 cuboctahedra, corners with two equivalent Mg(4)Mg12 cuboctahedra, corners with two equivalent Sn(1)Mg10Sb2 cuboctahedra, corners with two equivalent Sb(1)Mg10Sn2 cuboctahedra, corners with four equivalent Mg(5)Mg3SnSb cuboctahedra,  an edgeedge with one Mg(1)Mg12 cuboctahedra,  an edgeedge with one Mg(2)Mg12 cuboctahedra, edges with three equivalent Mg(5)Mg3SnSb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, and  a faceface with one Mg(5)Mg3SnSb cuboctahedra. In the sixth Mg site, Mg(6) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(4), and one Sn(1) atom. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(4), and one Sb(1) atom. Sn(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sb(1) atoms to form distorted SnMg10Sb2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Sn(1)Mg10Sb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Sb(1)Mg10Sn2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, and faces with two equivalent Sb(1)Mg10Sn2 cuboctahedra. Sb(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sn(1) atoms to form distorted SbMg10Sn2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Sb(1)Mg10Sn2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Sn(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with two equivalent Sn(1)Mg10Sb2 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg14SnSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.353
_cell_length_b   6.661
_cell_length_c   10.344
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   121.619
_symmetry_Int_Tables_number   1
_cell_volume   372.753
_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  0.170  0.335  0.625  1.0
  Mg  Mg1  1  0.170  0.835  0.625  1.0
  Mg  Mg2  1  0.669  0.334  0.125  1.0
  Mg  Mg3  1  0.668  0.334  0.625  1.0
  Mg  Mg4  1  0.669  0.835  0.125  1.0
  Mg  Mg5  1  0.668  0.834  0.625  1.0
  Mg  Mg6  1  0.332  0.167  0.376  1.0
  Mg  Mg7  1  0.332  0.167  0.874  1.0
  Mg  Mg8  1  0.332  0.666  0.376  1.0
  Mg  Mg9  1  0.332  0.666  0.874  1.0
  Mg  Mg10  1  0.833  0.166  0.376  1.0
  Mg  Mg11  1  0.833  0.166  0.874  1.0
  Mg  Mg12  1  0.832  0.666  0.377  1.0
  Mg  Mg13  1  0.832  0.666  0.873  1.0
  Sn  Sn14  1  0.165  0.332  0.125  1.0
  Sb  Sb15  1  0.162  0.831  0.125  1.0
[/CIF]
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The material described by Mg14SnSb 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)Mg10Sn2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)Mg3SnSb cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Sn(1)Mg10Sb2 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 Sn(1)Mg10Sb2 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(5)Mg3SnSb cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Sb(1)Mg10Sn2 cuboctahedra, and faces with four equivalent Mg(4)Mg12 cuboctahedra. In the third Mg site, Mg(3) is bonded in a 4-coordinate geometry to two equivalent Sn(1) 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 Mg(5)Mg3SnSb cuboctahedra, corners with four equivalent Sn(1)Mg10Sb2 cuboctahedra, corners with four equivalent Sb(1)Mg10Sn2 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 eight equivalent Mg(5)Mg3SnSb 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 to one Mg(1), one Mg(2), one Mg(4), one Sn(1), and one Sb(1) atom to form distorted MgMg3SnSb cuboctahedra that share corners with two equivalent Mg(1)Mg12 cuboctahedra, corners with two equivalent Mg(2)Mg12 cuboctahedra, corners with two equivalent Mg(4)Mg12 cuboctahedra, corners with two equivalent Sn(1)Mg10Sb2 cuboctahedra, corners with two equivalent Sb(1)Mg10Sn2 cuboctahedra, corners with four equivalent Mg(5)Mg3SnSb cuboctahedra,  an edgeedge with one Mg(1)Mg12 cuboctahedra,  an edgeedge with one Mg(2)Mg12 cuboctahedra, edges with three equivalent Mg(5)Mg3SnSb cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, and  a faceface with one Mg(5)Mg3SnSb cuboctahedra. In the sixth Mg site, Mg(6) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(4), and one Sn(1) atom. In the seventh Mg site, Mg(7) is bonded in a distorted single-bond geometry to one Mg(2), two equivalent Mg(4), and one Sb(1) atom. Sn(1) is bonded to two equivalent Mg(6), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sb(1) atoms to form distorted SnMg10Sb2 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Sn(1)Mg10Sb2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Sb(1)Mg10Sn2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, and faces with two equivalent Sb(1)Mg10Sn2 cuboctahedra. Sb(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Sn(1) atoms to form distorted SbMg10Sn2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Sb(1)Mg10Sn2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, corners with eight equivalent Mg(5)Mg3SnSb cuboctahedra, edges with two equivalent Sn(1)Mg10Sb2 cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, and faces with two equivalent Sn(1)Mg10Sb2 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg14SnSb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.353
_cell_length_b   6.661
_cell_length_c   10.344
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   121.619
_symmetry_Int_Tables_number   1
_cell_volume   372.753
_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  0.170  0.335  0.625  1.0
  Mg  Mg1  1  0.170  0.835  0.625  1.0
  Mg  Mg2  1  0.669  0.334  0.125  1.0
  Mg  Mg3  1  0.668  0.334  0.625  1.0
  Mg  Mg4  1  0.669  0.835  0.125  1.0
  Mg  Mg5  1  0.668  0.834  0.625  1.0
  Mg  Mg6  1  0.332  0.167  0.376  1.0
  Mg  Mg7  1  0.332  0.167  0.874  1.0
  Mg  Mg8  1  0.332  0.666  0.376  1.0
  Mg  Mg9  1  0.332  0.666  0.874  1.0
  Mg  Mg10  1  0.833  0.166  0.376  1.0
  Mg  Mg11  1  0.833  0.166  0.874  1.0
  Mg  Mg12  1  0.832  0.666  0.377  1.0
  Mg  Mg13  1  0.832  0.666  0.873  1.0
  Sn  Sn14  1  0.165  0.332  0.125  1.0
  Sb  Sb15  1  0.162  0.831  0.125  1.0
[/CIF]
.