data_MgNb2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.1
_cell_length_b   3.1
_cell_length_c   10.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   109.33
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgNb2Pb
_chemical_formula_sum   'Mg1 Nb2 Pb1'
_cell_volume   91.87
_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  0.0  0.0  0.0  1.0
  Nb  Nb1  1  0.79  0.0  0.53  1.0
  Nb  Nb2  1  0.79  0.0  0.6  1.0
  Pb  Pb3  1  0.0  0.0  0.07  1.0

data_MgNb2Pb
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.1
_cell_length_b   3.1
_cell_length_c   10.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   109.33
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgNb2Pb
_chemical_formula_sum   'Mg1 Nb2 Pb1'
_cell_volume   91.87
_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  0.0  0.0  0.0  1.0
  Nb  Nb1  1  0.79  0.0  0.53  1.0
  Nb  Nb2  1  0.79  0.0  0.6  1.0
  Pb  Pb3  1  0.0  0.0  0.07  1.0

Mg Nb Nb Pb
PbMg1(Nb)2 is Cubic alpha N2-derived structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one Nb cluster and one PbMg1 cluster. In the Nb cluster, there are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a single-bond geometry to one Nb(2) atom. The Nb(1)-Nb(2) bond length is 0.66 Å. In the second Nb site, Nb(2) is bonded in a single-bond geometry to one Nb(1) atom. In the PbMg1 cluster, Mg(1) is bonded in a single-bond geometry to one Pb(1) atom. The Mg(1)-Pb(1) bond length is 0.68 Å. Pb(1) is bonded in a single-bond geometry to one Mg(1) atom.