data_SrAlCr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.38
_cell_length_b   5.38
_cell_length_c   2.67
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   114.93
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrAlCr2
_chemical_formula_sum   'Sr1 Al1 Cr2'
_cell_volume   70.01
_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  0.89  0.0  0.0  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Cr  Cr1  1  0.45  0.27  0.33  1.0
  Cr  Cr2  1  0.45  0.73  0.33  1.0

data_SrAlCr2
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.67
_cell_length_b   5.38
_cell_length_c   5.38
_cell_angle_alpha   114.93
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrAlCr2
_chemical_formula_sum   'Sr1 Al1 Cr2'
_cell_volume   70.01
_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  Sr0  1  0.0  0.89  0.0  1.0
  Al  Al1  1  0.0  0.0  0.0  1.0
  Cr  Cr2  1  0.33  0.45  0.27  1.0
  Cr  Cr3  1  0.33  0.45  0.73  1.0

Sr Al Cr Cr
SrCr2Al crystallizes in the triclinic P1 space group. Sr(1) is bonded in a single-bond geometry to one Cr(1), one Cr(2), and one Al(1) atom. The Sr(1)-Cr(1) bond length is 3.40 Å. The Sr(1)-Cr(2) bond length is 2.39 Å. The Sr(1)-Al(1) bond length is 0.58 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 7-coordinate geometry to one Sr(1), two equivalent Cr(1), two equivalent Cr(2), and two equivalent Al(1) atoms. Both Cr(1)-Cr(1) bond lengths are 2.67 Å. There is one shorter (2.50 Å) and one longer (2.88 Å) Cr(1)-Cr(2) bond length. There is one shorter (2.39 Å) and one longer (2.84 Å) Cr(1)-Al(1) bond length. In the second Cr site, Cr(2) is bonded in a distorted single-bond geometry to one Sr(1) and two equivalent Cr(1) atoms. Al(1) is bonded in a single-bond geometry to one Sr(1) and two equivalent Cr(1) atoms.