data_SrPm3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.63
_cell_length_b   7.63
_cell_length_c   6.02
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrPm3
_chemical_formula_sum   'Sr2 Pm6'
_cell_volume   303.8
_cell_formula_units_Z   2
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  Sr6  1  0.0  0.41  0.5  1.0
  Sr  Sr7  1  0.82  0.2  0.51  1.0
  Pm  Pm0  1  0.0  0.12  0.51  1.0
  Pm  Pm1  1  0.98  0.55  0.51  1.0
  Pm  Pm2  1  0.02  0.55  0.51  1.0
  Pm  Pm3  1  0.82  0.49  0.5  1.0
  Pm  Pm4  1  0.84  0.06  0.5  1.0
  Pm  Pm5  1  0.8  0.06  0.5  1.0

data_SrPm3
_symmetry_space_group_name_H-M   P-1
_cell_length_a   6.02
_cell_length_b   7.63
_cell_length_c   7.63
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   SrPm3
_chemical_formula_sum   'Sr2 Pm6'
_cell_volume   303.8
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  Sr0  2  0.5  0.59  0.1  1.0
  Pm  Pm1  2  0.5  0.39  0.75  1.0
  Pm  Pm2  2  0.5  0.41  0.18  1.0
  Pm  Pm3  2  0.5  0.43  0.75  1.0

Sr Sr Pm Pm Pm Pm Pm Pm
Sr Sr Pm Pm Pm Pm Pm Pm 0 4 o o o 0 3 - o o 1 7 o o o 1 6 o o o 2 6 - o o 3 4 + o o 3 5 o o o 6 7 o o o 
SrPm3 is Hg_xSn structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one SrPm3 cluster. Sr(1) is bonded in a 2-coordinate geometry to one Sr(1) and one Pm(3) atom. The Sr(1)-Sr(1) bond length is 1.48 Å. The Sr(1)-Pm(3) bond length is 1.03 Å. There are three inequivalent Pm sites. In the first Pm site, Pm(1) is bonded in a distorted single-bond geometry to one Pm(2) atom. The Pm(1)-Pm(2) bond length is 1.09 Å. In the second Pm site, Pm(2) is bonded in a 2-coordinate geometry to one Pm(1) and one Pm(3) atom. The Pm(2)-Pm(3) bond length is 0.30 Å. In the third Pm site, Pm(3) is bonded in a bent 120 degrees geometry to one Sr(1) and one Pm(2) atom.