The compound described by NaMg14Cu 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 Cu(1) atoms to form NaMg10Cu2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Na(1)Mg10Cu2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Cu(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Cu cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Cu(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Cu 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)Mg10Cu2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Cu cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Cu(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)NaMg10Cu 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 Cu(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Cu2 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)NaMg10Cu cuboctahedra, faces with two equivalent Na(1)Mg10Cu2 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, and faces with four equivalent Mg(5)NaMg10Cu 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 Cu(1) atoms to form distorted MgNa2Mg8Cu2 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)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 cuboctahedra, edges with two equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Cu(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(5)NaMg10Cu cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Na(1)Mg10Cu2 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Cu(1)Na2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Cu 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)Mg10Cu2 cuboctahedra, corners with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, corners with four equivalent Cu(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(5)NaMg10Cu cuboctahedra, edges with four equivalent Mg(7)NaMg11 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)Na2Mg8Cu2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Cu 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 Cu(1) atom to form distorted MgNaMg10Cu cuboctahedra that share corners with four equivalent Mg(7)NaMg11 cuboctahedra, corners with ten equivalent Mg(5)NaMg10Cu cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 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)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Mg(5)NaMg10Cu cuboctahedra, edges with two equivalent Mg(7)NaMg11 cuboctahedra, edges with two equivalent Cu(1)Na2Mg10 cuboctahedra,  a faceface with one Na(1)Mg10Cu2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Cu(1)Na2Mg10 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Cu cuboctahedra. In the sixth Mg site, Mg(6) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Cu(1) atom. 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 six equivalent Mg(7)NaMg11 cuboctahedra, corners with eight equivalent Mg(5)NaMg10Cu cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with four equivalent Mg(5)NaMg10Cu cuboctahedra,  a faceface with one Na(1)Mg10Cu2 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Cu(1)Na2Mg10 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Cu cuboctahedra. Cu(1) is bonded to two equivalent Na(1), two equivalent Mg(6), four equivalent Mg(3), and four equivalent Mg(5) atoms to form CuNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Cu(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Cu cuboctahedra, faces with two equivalent Na(1)Mg10Cu2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, faces with four equivalent Mg(5)NaMg10Cu cuboctahedra, and faces with six equivalent Mg(7)NaMg11 cuboctahedra. is represented by the CIF card [CIF]
data_NaMg14Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.373
_cell_length_b   6.377
_cell_length_c   10.109
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.024
_symmetry_Int_Tables_number   1
_cell_volume   355.708
_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  0.165  0.833  0.125  1.0
  Mg  Mg1  1  0.167  0.334  0.625  1.0
  Mg  Mg2  1  0.169  0.835  0.625  1.0
  Mg  Mg3  1  0.669  0.339  0.125  1.0
  Mg  Mg4  1  0.665  0.331  0.625  1.0
  Mg  Mg5  1  0.669  0.829  0.125  1.0
  Mg  Mg6  1  0.665  0.834  0.625  1.0
  Mg  Mg7  1  0.331  0.173  0.371  1.0
  Mg  Mg8  1  0.331  0.173  0.879  1.0
  Mg  Mg9  1  0.331  0.658  0.371  1.0
  Mg  Mg10  1  0.331  0.658  0.879  1.0
  Mg  Mg11  1  0.841  0.170  0.365  1.0
  Mg  Mg12  1  0.841  0.170  0.885  1.0
  Mg  Mg13  1  0.831  0.665  0.381  1.0
  Mg  Mg14  1  0.831  0.665  0.869  1.0
  Cu  Cu15  1  0.164  0.332  0.125  1.0
[/CIF]
.
The compound described by NaMg14Cu 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 Cu(1) atoms to form NaMg10Cu2 cuboctahedra that share corners with four equivalent Mg(1)Mg12 cuboctahedra, corners with six equivalent Na(1)Mg10Cu2 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Cu(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Cu cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Cu(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Cu 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)Mg10Cu2 cuboctahedra, corners with six equivalent Mg(1)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Cu cuboctahedra, faces with two equivalent Mg(2)Mg12 cuboctahedra, faces with two equivalent Cu(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(5)NaMg10Cu 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 Cu(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with eight equivalent Mg(3)Na2Mg8Cu2 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)NaMg10Cu cuboctahedra, faces with two equivalent Na(1)Mg10Cu2 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, and faces with four equivalent Mg(5)NaMg10Cu 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 Cu(1) atoms to form distorted MgNa2Mg8Cu2 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)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 cuboctahedra, edges with two equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Cu(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(5)NaMg10Cu cuboctahedra, edges with four equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Na(1)Mg10Cu2 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with two equivalent Cu(1)Na2Mg10 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Cu 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)Mg10Cu2 cuboctahedra, corners with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, corners with four equivalent Cu(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(5)NaMg10Cu cuboctahedra, edges with four equivalent Mg(7)NaMg11 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)Na2Mg8Cu2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, and faces with eight equivalent Mg(5)NaMg10Cu 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 Cu(1) atom to form distorted MgNaMg10Cu cuboctahedra that share corners with four equivalent Mg(7)NaMg11 cuboctahedra, corners with ten equivalent Mg(5)NaMg10Cu cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 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)Na2Mg8Cu2 cuboctahedra, edges with two equivalent Mg(5)NaMg10Cu cuboctahedra, edges with two equivalent Mg(7)NaMg11 cuboctahedra, edges with two equivalent Cu(1)Na2Mg10 cuboctahedra,  a faceface with one Na(1)Mg10Cu2 cuboctahedra,  a faceface with one Mg(1)Mg12 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Cu(1)Na2Mg10 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with four equivalent Mg(4)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Cu cuboctahedra. In the sixth Mg site, Mg(6) is bonded in a distorted single-bond geometry to one Mg(1), two equivalent Mg(3), two equivalent Mg(4), two equivalent Mg(7), four equivalent Mg(5), and one Cu(1) atom. 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 six equivalent Mg(7)NaMg11 cuboctahedra, corners with eight equivalent Mg(5)NaMg10Cu cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 cuboctahedra, edges with two equivalent Mg(2)Mg12 cuboctahedra, edges with four equivalent Mg(4)Mg12 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with four equivalent Mg(5)NaMg10Cu cuboctahedra,  a faceface with one Na(1)Mg10Cu2 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with two equivalent Mg(4)Mg12 cuboctahedra, faces with two equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, faces with two equivalent Mg(7)NaMg11 cuboctahedra, faces with three equivalent Mg(1)Mg12 cuboctahedra, faces with three equivalent Cu(1)Na2Mg10 cuboctahedra, and faces with four equivalent Mg(5)NaMg10Cu cuboctahedra. Cu(1) is bonded to two equivalent Na(1), two equivalent Mg(6), four equivalent Mg(3), and four equivalent Mg(5) atoms to form CuNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Cu(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(4)Mg12 cuboctahedra, edges with two equivalent Na(1)Mg10Cu2 cuboctahedra, edges with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, edges with eight equivalent Mg(5)NaMg10Cu cuboctahedra, faces with two equivalent Na(1)Mg10Cu2 cuboctahedra, faces with two equivalent Mg(1)Mg12 cuboctahedra, faces with four equivalent Mg(3)Na2Mg8Cu2 cuboctahedra, faces with four equivalent Mg(5)NaMg10Cu cuboctahedra, and faces with six equivalent Mg(7)NaMg11 cuboctahedra. is represented by the CIF card [CIF]
data_NaMg14Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.373
_cell_length_b   6.377
_cell_length_c   10.109
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.024
_symmetry_Int_Tables_number   1
_cell_volume   355.708
_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  0.165  0.833  0.125  1.0
  Mg  Mg1  1  0.167  0.334  0.625  1.0
  Mg  Mg2  1  0.169  0.835  0.625  1.0
  Mg  Mg3  1  0.669  0.339  0.125  1.0
  Mg  Mg4  1  0.665  0.331  0.625  1.0
  Mg  Mg5  1  0.669  0.829  0.125  1.0
  Mg  Mg6  1  0.665  0.834  0.625  1.0
  Mg  Mg7  1  0.331  0.173  0.371  1.0
  Mg  Mg8  1  0.331  0.173  0.879  1.0
  Mg  Mg9  1  0.331  0.658  0.371  1.0
  Mg  Mg10  1  0.331  0.658  0.879  1.0
  Mg  Mg11  1  0.841  0.170  0.365  1.0
  Mg  Mg12  1  0.841  0.170  0.885  1.0
  Mg  Mg13  1  0.831  0.665  0.381  1.0
  Mg  Mg14  1  0.831  0.665  0.869  1.0
  Cu  Cu15  1  0.164  0.332  0.125  1.0
[/CIF]
.