The material described by NaMg6Y crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(2,2); and two equivalent Y(1) atoms to form NaY2Mg10 cuboctahedra that share corners with four equivalent Y(1)Na2Mg10 cuboctahedra; corners with six equivalent Na(1)Y2Mg10 cuboctahedra; edges with two equivalent Y(1)Na2Mg10 cuboctahedra; edges with four equivalent Mg(4)Na2Mg10 cuboctahedra; edges with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(3)Y2Mg10 cuboctahedra. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms. In the second Mg site, Mg(2) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms to form distorted MgNa2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with two equivalent Mg(2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Na(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; and faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra. In the third Mg site, Mg(2) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms to form distorted MgNa2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with two equivalent Mg(2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Na(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; and faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(2,2); and two equivalent Y(1) atoms to form MgY2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with six equivalent Mg(3)Y2Mg10 cuboctahedra; corners with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with four equivalent Y(1)Na2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Na(1)Y2Mg10 cuboctahedra. In the fifth Mg site, Mg(4) is bonded to two equivalent Na(1); two equivalent Mg(3); four equivalent Mg(1); and four Mg(2,2) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with six equivalent Mg(4)Na2Mg10 cuboctahedra; corners with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Na(1)Y2Mg10 cuboctahedra; edges with four Mg(2,2)Na2Y2Mg8 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Y(1)Na2Mg10 cuboctahedra. Y(1) is bonded to two equivalent Na(1); two equivalent Mg(3); four equivalent Mg(1); and four Mg(2,2) atoms to form YNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Y2Mg10 cuboctahedra; corners with six equivalent Y(1)Na2Mg10 cuboctahedra; edges with two equivalent Na(1)Y2Mg10 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; edges with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaYMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.237
_cell_length_b   6.691
_cell_length_c   6.691
_cell_angle_alpha   119.019
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   205.026
_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  0.500  0.663  0.825  1.0
  Mg  Mg1  1  0.500  0.175  0.337  1.0
  Mg  Mg2  1  1.000  0.830  0.670  1.0
  Mg  Mg3  1  1.000  0.330  0.170  1.0
  Mg  Mg4  1  0.000  0.336  0.664  1.0
  Mg  Mg5  1  0.000  0.836  0.164  1.0
  Na  Na6  1  0.500  0.666  0.334  1.0
  Y  Y7  1  0.500  0.165  0.835  1.0
[/CIF]
.
The material described by NaMg6Y crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(2,2); and two equivalent Y(1) atoms to form NaY2Mg10 cuboctahedra that share corners with four equivalent Y(1)Na2Mg10 cuboctahedra; corners with six equivalent Na(1)Y2Mg10 cuboctahedra; edges with two equivalent Y(1)Na2Mg10 cuboctahedra; edges with four equivalent Mg(4)Na2Mg10 cuboctahedra; edges with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(3)Y2Mg10 cuboctahedra. There are five inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 12-coordinate geometry to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms. In the second Mg site, Mg(2) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms to form distorted MgNa2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with two equivalent Mg(2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Na(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; and faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra. In the third Mg site, Mg(2) is bonded to two equivalent Na(1), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), and two equivalent Y(1) atoms to form distorted MgNa2Y2Mg8 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with ten Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with two equivalent Mg(2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Na(1)Y2Mg10 cuboctahedra; edges with four equivalent Y(1)Na2Mg10 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; and faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra. In the fourth Mg site, Mg(3) is bonded to two equivalent Mg(4); four equivalent Mg(1); four Mg(2,2); and two equivalent Y(1) atoms to form MgY2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra; corners with six equivalent Mg(3)Y2Mg10 cuboctahedra; corners with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(4)Na2Mg10 cuboctahedra; edges with four Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with four equivalent Y(1)Na2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Na(1)Y2Mg10 cuboctahedra. In the fifth Mg site, Mg(4) is bonded to two equivalent Na(1); two equivalent Mg(3); four equivalent Mg(1); and four Mg(2,2) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Mg(3)Y2Mg10 cuboctahedra; corners with six equivalent Mg(4)Na2Mg10 cuboctahedra; corners with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; edges with two equivalent Mg(3)Y2Mg10 cuboctahedra; edges with four equivalent Na(1)Y2Mg10 cuboctahedra; edges with four Mg(2,2)Na2Y2Mg8 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(4)Na2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Y(1)Na2Mg10 cuboctahedra. Y(1) is bonded to two equivalent Na(1); two equivalent Mg(3); four equivalent Mg(1); and four Mg(2,2) atoms to form YNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Y2Mg10 cuboctahedra; corners with six equivalent Y(1)Na2Mg10 cuboctahedra; edges with two equivalent Na(1)Y2Mg10 cuboctahedra; edges with four equivalent Mg(3)Y2Mg10 cuboctahedra; edges with eight Mg(2,2)Na2Y2Mg8 cuboctahedra; faces with two equivalent Na(1)Y2Mg10 cuboctahedra; faces with two equivalent Mg(3)Y2Mg10 cuboctahedra; faces with two equivalent Y(1)Na2Mg10 cuboctahedra; faces with four Mg(2,2)Na2Y2Mg8 cuboctahedra; and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_NaYMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.237
_cell_length_b   6.691
_cell_length_c   6.691
_cell_angle_alpha   119.019
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   205.026
_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  0.500  0.663  0.825  1.0
  Mg  Mg1  1  0.500  0.175  0.337  1.0
  Mg  Mg2  1  1.000  0.830  0.670  1.0
  Mg  Mg3  1  1.000  0.330  0.170  1.0
  Mg  Mg4  1  0.000  0.336  0.664  1.0
  Mg  Mg5  1  0.000  0.836  0.164  1.0
  Na  Na6  1  0.500  0.666  0.334  1.0
  Y  Y7  1  0.500  0.165  0.835  1.0
[/CIF]
.