data_YAlCd2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.52
_cell_length_b   5.52
_cell_length_c   5.52
_cell_angle_alpha   132.0
_cell_angle_beta   132.0
_cell_angle_gamma   70.23
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YAlCd2
_chemical_formula_sum   'Y1 Al1 Cd2'
_cell_volume   91.25
_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
  Y  Y3  1  0.0  0.0  0.52  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Cd  Cd1  1  0.0  0.25  0.26  1.0
  Cd  Cd2  1  0.25  0.0  0.26  1.0

data_YAlCd2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.36
_cell_length_b   6.36
_cell_length_c   5.52
_cell_angle_alpha   90.0
_cell_angle_beta   125.12
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YAlCd2
_chemical_formula_sum   'Y2 Al2 Cd4'
_cell_volume   182.5
_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
  Y  Y0  2  0.0  0.0  0.52  1.0
  Al  Al1  2  0.0  0.0  0.0  1.0
  Cd  Cd2  4  0.38  0.38  0.01  1.0

Y Al Cd Cd
YCd2Al crystallizes in the monoclinic Cm space group. Y(1) is bonded in a 5-coordinate geometry to four equivalent Cd(1) and one Al(1) atom. There are two shorter (2.55 Å) and two longer (3.37 Å) Y(1)-Cd(1) bond lengths. The Y(1)-Al(1) bond length is 2.66 Å. Cd(1) is bonded in a distorted single-bond geometry to two equivalent Y(1) and one Al(1) atom. The Cd(1)-Al(1) bond length is 1.14 Å. Al(1) is bonded in a distorted L-shaped geometry to one Y(1) and two equivalent Cd(1) atoms.