data_Y2MgCd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.45
_cell_length_b   3.45
_cell_length_c   9.11
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2MgCd
_chemical_formula_sum   'Y2 Mg1 Cd1'
_cell_volume   108.36
_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  Y2  1  0.72  0.72  0.96  1.0
  Y  Y3  1  0.0  0.0  0.51  1.0
  Mg  Mg1  1  0.0  0.0  0.57  1.0
  Cd  Cd0  1  0.72  0.72  0.72  1.0

data_Y2MgCd
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.88
_cell_length_b   4.88
_cell_length_c   9.11
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Y2MgCd
_chemical_formula_sum   'Y4 Mg2 Cd2'
_cell_volume   216.72
_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  0.51  1.0
  Y  Y1  2  0.22  0.5  0.96  1.0
  Mg  Mg2  2  0.0  0.0  0.57  1.0
  Cd  Cd3  2  0.22  0.5  0.72  1.0

Y Y Mg Cd
Y Y Mg Cd 0 3 o o o 1 2 o o o 1 3 - - o 2 3 - - o 
MgY2Cd crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgY2Cd clusters. Mg(1) is bonded in a 2-coordinate geometry to one Y(2) and one Cd(1) atom. The Mg(1)-Y(2) bond length is 0.56 Å. The Mg(1)-Cd(1) bond length is 1.93 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a single-bond geometry to one Cd(1) atom. The Y(1)-Cd(1) bond length is 2.19 Å. In the second Y site, Y(2) is bonded in a single-bond geometry to one Mg(1) atom. Cd(1) is bonded in a 2-coordinate geometry to one Mg(1) and one Y(1) atom.