data_Sr2CrBi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.71
_cell_length_b   3.71
_cell_length_c   9.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2CrBi
_chemical_formula_sum   'Sr2 Cr1 Bi1'
_cell_volume   126.95
_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  Sr2  1  0.86  0.86  0.55  1.0
  Sr  Sr3  1  0.0  0.0  0.92  1.0
  Cr  Cr1  1  0.0  0.0  0.29  1.0
  Bi  Bi0  1  0.86  0.86  0.24  1.0

data_Sr2CrBi
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.25
_cell_length_b   5.25
_cell_length_c   9.2
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr2CrBi
_chemical_formula_sum   'Sr4 Cr2 Bi2'
_cell_volume   253.9
_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  0.92  1.0
  Sr  Sr1  2  0.36  0.5  0.55  1.0
  Cr  Cr2  2  0.0  0.0  0.29  1.0
  Bi  Bi3  2  0.36  0.5  0.24  1.0

Sr Sr Cr Bi
Sr Sr Cr Bi 0 2 + + o 0 3 o o o 0 1 + + o 1 3 - - + 1 1 + o o 1 1 o + o 1 2 o o + 2 3 - - o 
Sr2CrBi crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Sr2CrBi clusters. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a single-bond geometry to one Cr(1) atom. The Sr(1)-Cr(1) bond length is 2.48 Å. In the second Sr site, Sr(2) is bonded in a single-bond geometry to one Bi(1) atom. The Sr(2)-Bi(1) bond length is 3.00 Å. Cr(1) is bonded in a distorted single-bond geometry to one Sr(1) and one Bi(1) atom. The Cr(1)-Bi(1) bond length is 0.91 Å. Bi(1) is bonded in a single-bond geometry to one Sr(2) and one Cr(1) atom.