data_YCu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.55
_cell_length_b   4.55
_cell_length_c   4.55
_cell_angle_alpha   45.72
_cell_angle_beta   45.72
_cell_angle_gamma   45.72
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YCu
_chemical_formula_sum   'Y1 Cu1'
_cell_volume   43.89
_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  Y1  1  0.0  0.0  0.09  1.0
  Cu  Cu0  1  0.0  0.0  0.0  1.0

data_YCu
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.12
_cell_length_b   3.53
_cell_length_c   4.55
_cell_angle_alpha   90.0
_cell_angle_beta   116.65
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YCu
_chemical_formula_sum   'Y2 Cu2'
_cell_volume   87.79
_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  0.09  1.0
  Cu  Cu1  2  0.0  0.0  0.0  1.0

Y Cu
YCu is alpha carbon monoxide-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two YCu clusters. Y(1) is bonded in a single-bond geometry to one Cu(1) atom. The Y(1)-Cu(1) bond length is 0.43 Å. Cu(1) is bonded in a single-bond geometry to one Y(1) atom.