data_LiFe2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.45
_cell_length_b   4.45
_cell_length_c   4.45
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LiFe2Pb
_chemical_formula_sum   'Li1 Fe2 Pb1'
_cell_volume   62.24
_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
  Li  Li2  1  0.0  0.0  0.0  1.0
  Fe  Fe0  1  0.72  0.72  0.72  1.0
  Fe  Fe1  1  0.57  0.57  0.57  1.0
  Pb  Pb3  1  0.15  0.15  0.15  1.0

data_LiFe2Pb
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.45
_cell_length_b   4.45
_cell_length_c   10.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   LiFe2Pb
_chemical_formula_sum   'Li3 Fe6 Pb3'
_cell_volume   186.72
_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
  Li  Li0  3  0.0  0.0  0.0  1.0
  Fe  Fe1  3  0.0  0.0  0.28  1.0
  Fe  Fe2  3  0.0  0.0  0.43  1.0
  Pb  Pb3  3  0.0  0.0  0.85  1.0

Li Fe Fe Pb
Li Fe Fe Pb 0 3 o o o 1 2 o o o 
LiFe2Pb crystallizes in the trigonal R3m space group. Li(1) is bonded in a single-bond geometry to three equivalent Fe(2), four equivalent Fe(1), and one Pb(1) atom. All Li(1)-Fe(2) bond lengths are 2.76 Å. There are three shorter (2.63 Å) and one longer (3.07 Å) Li(1)-Fe(1) bond length. The Li(1)-Pb(1) bond length is 1.58 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 8-coordinate geometry to four equivalent Li(1), one Fe(2), and three equivalent Pb(1) atoms. The Fe(1)-Fe(2) bond length is 1.58 Å. All Fe(1)-Pb(1) bond lengths are 2.76 Å. In the second Fe site, Fe(2) is bonded in a 7-coordinate geometry to three equivalent Li(1), one Fe(1), and three equivalent Pb(1) atoms. All Fe(2)-Pb(1) bond lengths are 2.76 Å. Pb(1) is bonded in a single-bond geometry to one Li(1), three equivalent Fe(1), and three equivalent Fe(2) atoms.