data_SrNi2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.37
_cell_length_b   3.37
_cell_length_c   7.32
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrNi2Pb
_chemical_formula_sum   'Sr1 Ni2 Pb1'
_cell_volume   82.94
_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
  Sr  Sr3  1  0.0  0.0  0.86  1.0
  Ni  Ni0  1  0.68  0.68  0.53  1.0
  Ni  Ni1  1  0.0  0.0  0.45  1.0
  Pb  Pb2  1  0.68  0.68  0.13  1.0

data_SrNi2Pb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.76
_cell_length_b   4.76
_cell_length_c   7.32
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrNi2Pb
_chemical_formula_sum   'Sr2 Ni4 Pb2'
_cell_volume   165.87
_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
  Sr  Sr0  2  0.0  0.0  0.86  1.0
  Ni  Ni1  2  0.0  0.0  0.45  1.0
  Ni  Ni2  2  0.18  0.5  0.53  1.0
  Pb  Pb3  2  0.18  0.5  0.13  1.0

Sr Ni Ni Pb
Sr Ni Ni Pb 0 1 - - o 0 3 - - + 0 3 - o + 0 3 o - + 0 0 + o o 0 0 o + o 0 2 o o o 1 2 + + o 1 3 o o o 2 3 - - o 3 3 + o o 3 3 o + o 
SrNi2Pb crystallizes in the monoclinic Cm space group. Sr(1) is bonded in a 1-coordinate geometry to one Ni(1), one Ni(2), and one Pb(1) atom. The Sr(1)-Ni(1) bond length is 2.83 Å. The Sr(1)-Ni(2) bond length is 3.01 Å. The Sr(1)-Pb(1) bond length is 2.50 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 2-coordinate geometry to one Sr(1) and three equivalent Ni(2) atoms. There is one shorter (1.63 Å) and two longer (2.61 Å) Ni(1)-Ni(2) bond lengths. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to one Sr(1), three equivalent Ni(1), and one Pb(1) atom. The Ni(2)-Pb(1) bond length is 2.77 Å. Pb(1) is bonded in a distorted single-bond geometry to one Sr(1) and one Ni(2) atom.