data_Nb2CoSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.04
_cell_length_b   3.67
_cell_length_c   5.71
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Nb2CoSe
_chemical_formula_sum   'Nb2 Co1 Se1'
_cell_volume   63.68
_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
  Nb  Nb1  1  0.52  0.84  0.34  1.0
  Nb  Nb2  1  0.52  0.84  0.37  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0
  Se  Se3  1  0.0  0.0  0.85  1.0

data_Nb2CoSe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.04
_cell_length_b   3.67
_cell_length_c   5.71
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Nb2CoSe
_chemical_formula_sum   'Nb2 Co1 Se1'
_cell_volume   63.68
_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
  Nb  Nb0  1  0.52  0.84  0.34  1.0
  Nb  Nb1  1  0.52  0.84  0.37  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  Se  Se3  1  0.0  0.0  0.85  1.0

Nb Nb Co Se
(Nb)2CoSe is High Pressure Cadmuum Telluride structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one cobalt selenide molecule and one Nb cluster. In the Nb cluster, there are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded in a distorted single-bond geometry to one Nb(2) atom. The Nb(1)-Nb(2) bond length is 0.16 Å. In the second Nb site, Nb(2) is bonded in a single-bond geometry to one Nb(1) atom.