The crystal structure described by NaMg6Y is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form NaY2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with six equivalent Na(1)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with four equivalent Y(1)Na2Mg10 cuboctahedra, edges with eight equivalent Mg(1)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 equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Mg(2)Y2Mg10 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) 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(2)Y2Mg10 cuboctahedra, corners with four equivalent Y(1)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(2)Y2Mg10 cuboctahedra, edges with two equivalent Y(1)Na2Mg10 cuboctahedra, edges with four equivalent Na(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, faces with two equivalent Na(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, and faces with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form MgY2Mg10 cuboctahedra that share corners with four equivalent Y(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Y(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Na(1)Y2Mg10 cuboctahedra. In the third Mg site, Mg(3) 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 Na(1)Y2Mg10 cuboctahedra, corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with two equivalent Na(1)Y2Mg10 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with two equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with four equivalent Mg(2)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(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(4)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with two equivalent Na(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with four equivalent Mg(2)Y2Mg10 cuboctahedra, edges with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with two equivalent Na(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Y(1)Na2Mg10 cuboctahedra. Y(1) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form YNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Y2Mg10 cuboctahedra, corners with six equivalent Y(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(2)Y2Mg10 cuboctahedra, edges with four equivalent Na(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, faces with two equivalent Na(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra. is represented by the CIF card [CIF]
data_NaYMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.269
_cell_length_b   6.658
_cell_length_c   6.673
_cell_angle_alpha   119.927
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   202.863
_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  0.000  0.830  0.163  1.0
  Mg  Mg1  1  1.000  0.333  0.163  1.0
  Mg  Mg2  1  0.000  0.336  0.673  1.0
  Mg  Mg3  1  0.500  0.666  0.834  1.0
  Mg  Mg4  1  0.500  0.168  0.834  1.0
  Mg  Mg5  1  0.500  0.167  0.334  1.0
  Na  Na6  1  0.500  0.662  0.324  1.0
  Y  Y7  1  0.000  0.837  0.675  1.0
[/CIF]
.
The crystal structure described by NaMg6Y is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Amm2 space group. Na(1) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form NaY2Mg10 cuboctahedra that share corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with six equivalent Na(1)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with four equivalent Y(1)Na2Mg10 cuboctahedra, edges with eight equivalent Mg(1)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 equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Mg(2)Y2Mg10 cuboctahedra. There are four inequivalent Mg sites. In the first Mg site, Mg(1) 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(2)Y2Mg10 cuboctahedra, corners with four equivalent Y(1)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(2)Y2Mg10 cuboctahedra, edges with two equivalent Y(1)Na2Mg10 cuboctahedra, edges with four equivalent Na(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, faces with two equivalent Na(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, and faces with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra. In the second Mg site, Mg(2) is bonded to two equivalent Mg(4), four equivalent Mg(1), four equivalent Mg(3), and two equivalent Y(1) atoms to form MgY2Mg10 cuboctahedra that share corners with four equivalent Y(1)Na2Mg10 cuboctahedra, corners with six equivalent Mg(2)Y2Mg10 cuboctahedra, corners with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Y(1)Na2Mg10 cuboctahedra, edges with four equivalent Mg(4)Na2Mg10 cuboctahedra, edges with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Na(1)Y2Mg10 cuboctahedra. In the third Mg site, Mg(3) 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 Na(1)Y2Mg10 cuboctahedra, corners with four equivalent Mg(4)Na2Mg10 cuboctahedra, corners with ten equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with two equivalent Na(1)Y2Mg10 cuboctahedra, edges with two equivalent Mg(4)Na2Mg10 cuboctahedra, edges with two equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with four equivalent Mg(2)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(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra. In the fourth Mg site, Mg(4) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form distorted MgNa2Mg10 cuboctahedra that share corners with four equivalent Na(1)Y2Mg10 cuboctahedra, corners with six equivalent Mg(4)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with two equivalent Na(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, edges with four equivalent Mg(2)Y2Mg10 cuboctahedra, edges with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with two equivalent Na(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(4)Na2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Y(1)Na2Mg10 cuboctahedra. Y(1) is bonded to two equivalent Na(1), two equivalent Mg(2), four equivalent Mg(1), and four equivalent Mg(3) atoms to form YNa2Mg10 cuboctahedra that share corners with four equivalent Mg(2)Y2Mg10 cuboctahedra, corners with six equivalent Y(1)Na2Mg10 cuboctahedra, corners with eight equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with two equivalent Mg(2)Y2Mg10 cuboctahedra, edges with four equivalent Na(1)Y2Mg10 cuboctahedra, edges with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, edges with eight equivalent Mg(3)Na2Y2Mg8 cuboctahedra, faces with two equivalent Na(1)Y2Mg10 cuboctahedra, faces with two equivalent Mg(2)Y2Mg10 cuboctahedra, faces with two equivalent Y(1)Na2Mg10 cuboctahedra, faces with four equivalent Mg(1)Na2Y2Mg8 cuboctahedra, faces with four equivalent Mg(3)Na2Y2Mg8 cuboctahedra, and faces with six equivalent Mg(4)Na2Mg10 cuboctahedra. is represented by the CIF card [CIF]
data_NaYMg6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.269
_cell_length_b   6.658
_cell_length_c   6.673
_cell_angle_alpha   119.927
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   202.863
_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  0.000  0.830  0.163  1.0
  Mg  Mg1  1  1.000  0.333  0.163  1.0
  Mg  Mg2  1  0.000  0.336  0.673  1.0
  Mg  Mg3  1  0.500  0.666  0.834  1.0
  Mg  Mg4  1  0.500  0.168  0.834  1.0
  Mg  Mg5  1  0.500  0.167  0.334  1.0
  Na  Na6  1  0.500  0.662  0.324  1.0
  Y  Y7  1  0.000  0.837  0.675  1.0
[/CIF]
.