data_Y2Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.77
_cell_length_b   4.77
_cell_length_c   3.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y2Ni
_chemical_formula_sum   'Y2 Ni1'
_cell_volume   75.03
_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  0.39  0.65  1.0
  Y  Y2  1  0.39  0.0  0.65  1.0
  Ni  Ni0  1  0.0  0.0  0.0  1.0

data_Y2Ni
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.75
_cell_length_b   6.75
_cell_length_c   3.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Y2Ni
_chemical_formula_sum   'Y4 Ni2'
_cell_volume   150.06
_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  4  0.19  0.19  0.65  1.0
  Ni  Ni1  2  0.0  0.0  0.0  1.0

Y Y Ni
Y Y Ni 0 2 o o + 0 1 o o o 1 2 o o + 
Y2Ni crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Y2Ni clusters. Y(1) is bonded in a 1-coordinate geometry to one Ni(1) atom. The Y(1)-Ni(1) bond length is 2.18 Å. Ni(1) is bonded in a 2-coordinate geometry to two equivalent Y(1) atoms.