data_NaYMg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.63
_cell_length_b   5.63
_cell_length_c   3.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaYMg2
_chemical_formula_sum   'Na1 Y1 Mg2'
_cell_volume   112.6
_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  Na2  1  0.0  0.0  0.0  1.0
  Y  Y3  1  0.81  0.81  0.0  1.0
  Mg  Mg0  1  0.81  0.0  0.78  1.0
  Mg  Mg1  1  0.0  0.81  0.78  1.0

data_NaYMg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.96
_cell_length_b   7.96
_cell_length_c   3.55
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaYMg2
_chemical_formula_sum   'Na2 Y2 Mg4'
_cell_volume   225.2
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.0  1.0
  Y  Y1  2  0.31  0.5  0.0  1.0
  Mg  Mg2  4  0.41  0.41  0.78  1.0

Na Y Mg Mg
NaMg2Y crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two NaMg2Y clusters. Na(1) is bonded in a 3-coordinate geometry to two equivalent Mg(1) and one Y(1) atom. Both Na(1)-Mg(1) bond lengths are 1.31 Å. The Na(1)-Y(1) bond length is 1.47 Å. Mg(1) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one Y(1) atom. The Mg(1)-Mg(1) bond length is 1.47 Å. The Mg(1)-Y(1) bond length is 1.31 Å. Y(1) is bonded in a 3-coordinate geometry to one Na(1) and two equivalent Mg(1) atoms.