data_Na2LaMg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.4
_cell_length_b   6.4
_cell_length_c   6.12
_cell_angle_alpha   96.53
_cell_angle_beta   96.53
_cell_angle_gamma   31.1
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2LaMg
_chemical_formula_sum   'Na2 La1 Mg1'
_cell_volume   128.63
_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  0.02  0.0  0.45  1.0
  Na  Na3  1  0.59  0.0  0.63  1.0
  La  La0  1  0.81  0.0  0.04  1.0
  Mg  Mg1  1  0.0  0.0  0.0  1.0

data_Na2LaMg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.43
_cell_length_b   6.12
_cell_length_c   6.4
_cell_angle_alpha   96.53
_cell_angle_beta   105.55
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2LaMg
_chemical_formula_sum   'Na2 La1 Mg1'
_cell_volume   128.63
_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  0.0  0.45  0.02  1.0
  Na  Na1  1  0.0  0.63  0.59  1.0
  La  La2  1  0.0  0.04  0.81  1.0
  Mg  Mg3  1  0.0  0.0  0.0  1.0

Na Na La Mg
Na2MgLa crystallizes in the triclinic P1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to two equivalent Na(1), two equivalent Na(2), two equivalent Mg(1), and one La(1) atom. Both Na(1)-Na(1) bond lengths are 3.43 Å. There is one shorter (3.05 Å) and one longer (3.72 Å) Na(1)-Na(2) bond length. There is one shorter (2.72 Å) and one longer (3.40 Å) Na(1)-Mg(1) bond length. The Na(1)-La(1) bond length is 2.71 Å. In the second Na site, Na(2) is bonded in a distorted single-bond geometry to two equivalent Na(1) and one La(1) atom. The Na(2)-La(1) bond length is 2.71 Å. Mg(1) is bonded in a single-bond geometry to two equivalent Na(1) and one La(1) atom. The Mg(1)-La(1) bond length is 1.28 Å. La(1) is bonded in a single-bond geometry to one Na(1), one Na(2), and one Mg(1) atom.