data_Dy(Al2Cr)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.8
_cell_length_b   6.8
_cell_length_c   6.8
_cell_angle_alpha   97.9
_cell_angle_beta   97.9
_cell_angle_gamma   136.48
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Dy(Al2Cr)4
_chemical_formula_sum   'Dy1 Al8 Cr4'
_cell_volume   200.93
_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
  Dy  Dy0  1  0.0  0.0  0.0  1.0
  Al  Al1  1  0.46  0.48  0.0  1.0
  Al  Al2  1  0.98  0.0  0.52  1.0
  Al  Al3  1  0.0  0.92  0.0  1.0
  Al  Al4  1  0.01  0.0  0.0  1.0
  Al  Al5  1  0.92  0.0  0.0  1.0
  Al  Al6  1  0.0  0.01  0.0  1.0
  Al  Al7  1  0.0  0.98  0.52  1.0
  Al  Al8  1  0.48  0.46  0.0  1.0
  Cr  Cr9  1  0.23  0.23  0.74  1.0
  Cr  Cr10  1  0.23  0.23  0.26  1.0
  Cr  Cr11  1  0.77  0.23  0.26  1.0
  Cr  Cr12  1  0.23  0.77  0.26  1.0

data_Dy(Al2Cr)4
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.04
_cell_length_b   12.63
_cell_length_c   6.8
_cell_angle_alpha   90.0
_cell_angle_beta   111.76
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Dy(Al2Cr)4
_chemical_formula_sum   'Dy2 Al16 Cr8'
_cell_volume   401.85
_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
  Dy  Dy0  2  0.0  0.0  0.0  1.0
  Al  Al1  4  0.03  0.49  0.0  1.0
  Al  Al2  4  0.03  0.49  0.52  1.0
  Al  Al3  4  0.04  0.04  0.0  1.0
  Al  Al4  4  0.49  0.49  0.0  1.0
  Cr  Cr5  4  0.26  0.23  0.26  1.0
  Cr  Cr6  2  0.01  0.5  0.74  1.0
  Cr  Cr7  2  0.03  0.0  0.26  1.0

Dy Al Al Al Al Al Al Al Al Cr Cr Cr Cr
Dy(CrAl2)4 crystallizes in the monoclinic Cm space group. Dy(1) is bonded in a bent 150 degrees geometry to two equivalent Al(4) atoms. Both Dy(1)-Al(4) bond lengths are 0.09 Å. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a 4-coordinate geometry to two equivalent Al(1) and two equivalent Al(2) atoms. Both Cr(1)-Al(1) bond lengths are 1.74 Å. Both Cr(1)-Al(2) bond lengths are 1.54 Å. In the second Cr site, Cr(2) is bonded in a 8-coordinate geometry to two equivalent Al(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(4) atoms. Both Cr(2)-Al(1) bond lengths are 2.49 Å. Both Cr(2)-Al(2) bond lengths are 2.49 Å. Both Cr(2)-Al(3) bond lengths are 1.87 Å. Both Cr(2)-Al(4) bond lengths are 1.71 Å. In the third Cr site, Cr(3) is bonded in a 3-coordinate geometry to two equivalent Cr(3) and one Al(3) atom. Both Cr(3)-Cr(3) bond lengths are 2.56 Å. The Cr(3)-Al(3) bond length is 2.94 Å. There are four inequivalent Al sites. In the first Al site, Al(1) is bonded in a single-bond geometry to one Cr(1), one Cr(2), and one Al(1) atom. The Al(1)-Al(1) bond length is 0.22 Å. In the second Al site, Al(2) is bonded in a single-bond geometry to one Cr(1), one Cr(2), and one Al(2) atom. The Al(2)-Al(2) bond length is 0.22 Å. In the third Al site, Al(3) is bonded in a single-bond geometry to one Cr(2), one Cr(3), and one Al(4) atom. The Al(3)-Al(4) bond length is 0.51 Å. In the fourth Al site, Al(4) is bonded in a single-bond geometry to one Dy(1), one Cr(2), and one Al(3) atom.