The compound described by NaMg14Si crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Si(1) atoms to form NaMg10Si2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Na(1)Mg10Si2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Si(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(6)Mg11Si 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 Na(1)Mg10Si2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)Mg11Si cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Si(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(7)NaMg11 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 Si(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Na(1)Mg10Si2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(6)Mg11Si cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Na(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Si(1) atoms to form distorted MgNa2Mg8Si2 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)Na2Mg8Si2 cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(6)Mg11Si cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Na(1)Mg10Si2 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Si(1)Na2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Si 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 Na(1)Mg10Si2 cuboctahedra, corners with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, corners with four equivalent Si(1)Na2Mg10 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)Mg11Si cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Mg(6)Mg11Si 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)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Si cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Na(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 Si(1) atom to form distorted MgNaMg10Si cuboctahedra that share corners with four equivalent Mg(6)Mg11Si cuboctahedra, corners with four equivalent Mg(7)NaMg11 cuboctahedra, corners with ten equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with two equivalent Mg(6)Mg11Si 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)Na2Mg8Si2 cuboctahedra, edges with two equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Mg(7)NaMg11 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra,  a faceface with one Na(1)Mg10Si2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Si(1)Na2Mg10 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Si 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 Si(1) atom to form distorted MgMg11Si cuboctahedra that share corners with four equivalent Mg(7)NaMg11 cuboctahedra, corners with six equivalent Mg(6)Mg11Si cuboctahedra, corners with eight equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(7)NaMg11 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Si(1)Na2Mg10 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with three equivalent Na(1)Mg10Si2 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Si cuboctahedra. In the seventh Mg site, Mg(7) is bonded to one Na(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), and four equivalent Mg(5) atoms to form distorted MgNaMg11 cuboctahedra that share corners with four equivalent Mg(6)Mg11Si cuboctahedra, corners with six equivalent Mg(7)NaMg11 cuboctahedra, corners with eight equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with two equivalent Mg(6)Mg11Si cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra,  a faceface with one Na(1)Mg10Si2 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Si(1)Na2Mg10 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Si cuboctahedra. Si(1) is bonded to two equivalent Na(1), two equivalent Mg(6), four equivalent Mg(3), and four equivalent Mg(5) atoms to form SiNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Si(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with four equivalent Mg(6)Mg11Si cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Na(1)Mg10Si2 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(7)NaMg11 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaMg14Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.326
_cell_length_b   6.339
_cell_length_c   10.448
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.070
_symmetry_Int_Tables_number   1
_cell_volume   362.597
_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
  Na  Na0  1  0.166  0.833  0.125  1.0
  Mg  Mg1  1  0.167  0.333  0.625  1.0
  Mg  Mg2  1  0.167  0.834  0.625  1.0
  Mg  Mg3  1  0.667  0.335  0.125  1.0
  Mg  Mg4  1  0.666  0.332  0.625  1.0
  Mg  Mg5  1  0.667  0.832  0.125  1.0
  Mg  Mg6  1  0.666  0.834  0.625  1.0
  Mg  Mg7  1  0.332  0.170  0.374  1.0
  Mg  Mg8  1  0.332  0.170  0.876  1.0
  Mg  Mg9  1  0.332  0.663  0.374  1.0
  Mg  Mg10  1  0.332  0.663  0.876  1.0
  Mg  Mg11  1  0.836  0.168  0.371  1.0
  Mg  Mg12  1  0.836  0.168  0.879  1.0
  Mg  Mg13  1  0.831  0.666  0.379  1.0
  Mg  Mg14  1  0.831  0.666  0.871  1.0
  Si  Si15  1  0.170  0.335  0.125  1.0
[/CIF]
.
The compound described by NaMg14Si crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(7), four equivalent Mg(3), four equivalent Mg(5), and two equivalent Si(1) atoms to form NaMg10Si2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Na(1)Mg10Si2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Si(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(6)Mg11Si 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 Na(1)Mg10Si2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(6)Mg11Si cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Si(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(7)NaMg11 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 Si(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Na(1)Mg10Si2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(6)Mg11Si cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Na(1), two equivalent Mg(3), two equivalent Mg(5), two equivalent Mg(6), two equivalent Mg(7), and two equivalent Si(1) atoms to form distorted MgNa2Mg8Si2 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)Na2Mg8Si2 cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(6)Mg11Si cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Na(1)Mg10Si2 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Si(1)Na2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Si 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 Na(1)Mg10Si2 cuboctahedra, corners with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, corners with four equivalent Si(1)Na2Mg10 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)Mg11Si cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Mg(6)Mg11Si 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)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Si cuboctahedra. In the fifth Mg site, Mg(5) is bonded to one Na(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 Si(1) atom to form distorted MgNaMg10Si cuboctahedra that share corners with four equivalent Mg(6)Mg11Si cuboctahedra, corners with four equivalent Mg(7)NaMg11 cuboctahedra, corners with ten equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with two equivalent Mg(6)Mg11Si 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)Na2Mg8Si2 cuboctahedra, edges with two equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Mg(7)NaMg11 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra,  a faceface with one Na(1)Mg10Si2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Si(1)Na2Mg10 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Si 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 Si(1) atom to form distorted MgMg11Si cuboctahedra that share corners with four equivalent Mg(7)NaMg11 cuboctahedra, corners with six equivalent Mg(6)Mg11Si cuboctahedra, corners with eight equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Mg(1)Mg12 cuboctahedra, edges with two equivalent Mg(7)NaMg11 cuboctahedra, edges with two equivalent Si(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Si(1)Na2Mg10 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with three equivalent Na(1)Mg10Si2 cuboctahedra, faces with three equivalent Mg(2)Mg12 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Si cuboctahedra. In the seventh Mg site, Mg(7) is bonded to one Na(1), one Mg(2), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(6), and four equivalent Mg(5) atoms to form distorted MgNaMg11 cuboctahedra that share corners with four equivalent Mg(6)Mg11Si cuboctahedra, corners with six equivalent Mg(7)NaMg11 cuboctahedra, corners with eight equivalent Mg(5)NaMg10Si cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with two equivalent Mg(6)Mg11Si cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with four equivalent Mg(5)NaMg10Si cuboctahedra,  a faceface with one Na(1)Mg10Si2 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Si(1)Na2Mg10 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Si cuboctahedra. Si(1) is bonded to two equivalent Na(1), two equivalent Mg(6), four equivalent Mg(3), and four equivalent Mg(5) atoms to form SiNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Si(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Na(1)Mg10Si2 cuboctahedra, edges with four equivalent Mg(6)Mg11Si cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Si cuboctahedra, faces with two equivalent Na(1)Mg10Si2 cuboctahedra, faces with two equivalent Mg(6)Mg11Si cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Si2 cuboctahedra, faces with four equivalent Mg(5)NaMg10Si cuboctahedra, and faces with six equivalent Mg(7)NaMg11 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaMg14Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.326
_cell_length_b   6.339
_cell_length_c   10.448
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.070
_symmetry_Int_Tables_number   1
_cell_volume   362.597
_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
  Na  Na0  1  0.166  0.833  0.125  1.0
  Mg  Mg1  1  0.167  0.333  0.625  1.0
  Mg  Mg2  1  0.167  0.834  0.625  1.0
  Mg  Mg3  1  0.667  0.335  0.125  1.0
  Mg  Mg4  1  0.666  0.332  0.625  1.0
  Mg  Mg5  1  0.667  0.832  0.125  1.0
  Mg  Mg6  1  0.666  0.834  0.625  1.0
  Mg  Mg7  1  0.332  0.170  0.374  1.0
  Mg  Mg8  1  0.332  0.170  0.876  1.0
  Mg  Mg9  1  0.332  0.663  0.374  1.0
  Mg  Mg10  1  0.332  0.663  0.876  1.0
  Mg  Mg11  1  0.836  0.168  0.371  1.0
  Mg  Mg12  1  0.836  0.168  0.879  1.0
  Mg  Mg13  1  0.831  0.666  0.379  1.0
  Mg  Mg14  1  0.831  0.666  0.871  1.0
  Si  Si15  1  0.170  0.335  0.125  1.0
[/CIF]
.