data_NaMgAgPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.1
_cell_length_b   5.1
_cell_length_c   5.1
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaMgAgPb
_chemical_formula_sum   'Na1 Mg1 Ag1 Pb1'
_cell_volume   93.97
_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
  Mg  Mg1  1  0.8  0.8  0.8  1.0
  Ag  Ag0  1  0.41  0.41  0.41  1.0
  Pb  Pb3  1  0.61  0.61  0.61  1.0

data_NaMgAgPb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.1
_cell_length_b   5.1
_cell_length_c   12.5
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NaMgAgPb
_chemical_formula_sum   'Na3 Mg3 Ag3 Pb3'
_cell_volume   281.9
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Mg  Mg1  3  0.0  0.0  0.2  1.0
  Ag  Ag2  3  0.0  0.0  0.59  1.0
  Pb  Pb3  3  0.0  0.0  0.39  1.0

Na Mg Ag Pb
NaMgAgPb crystallizes in the trigonal R3m space group. Na(1) is bonded in a 7-coordinate geometry to one Mg(1), three equivalent Ag(1), and three equivalent Pb(1) atoms. The Na(1)-Mg(1) bond length is 2.45 Å. All Na(1)-Ag(1) bond lengths are 3.11 Å. All Na(1)-Pb(1) bond lengths are 3.03 Å. Mg(1) is bonded in a 2-coordinate geometry to one Na(1), three equivalent Ag(1), and one Pb(1) atom. All Mg(1)-Ag(1) bond lengths are 3.03 Å. The Mg(1)-Pb(1) bond length is 2.45 Å. Ag(1) is bonded in a 7-coordinate geometry to three equivalent Na(1), three equivalent Mg(1), and one Pb(1) atom. The Ag(1)-Pb(1) bond length is 2.45 Å. Pb(1) is bonded in a 5-coordinate geometry to three equivalent Na(1), one Mg(1), and one Ag(1) atom.