data_NbNiAg2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.04
_cell_length_b   5.04
_cell_length_c   5.04
_cell_angle_alpha   134.52
_cell_angle_beta   134.52
_cell_angle_gamma   66.28
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbNiAg2
_chemical_formula_sum   'Nb1 Ni1 Ag2'
_cell_volume   64.24
_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  Nb2  1  0.0  0.0  0.22  1.0
  Ni  Ni3  1  0.0  0.0  0.0  1.0
  Ag  Ag0  1  0.95  0.0  0.11  1.0
  Ag  Ag1  1  0.0  0.95  0.11  1.0

data_NbNiAg2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.52
_cell_length_b   5.52
_cell_length_c   5.04
_cell_angle_alpha   90.0
_cell_angle_beta   123.14
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NbNiAg2
_chemical_formula_sum   'Nb2 Ni2 Ag4'
_cell_volume   128.47
_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
  Nb  Nb0  2  0.0  0.0  0.22  1.0
  Ni  Ni1  2  0.0  0.0  0.0  1.0
  Ag  Ag2  4  0.03  0.03  0.16  1.0

Nb Ni Ag Ag
Nb Ni Ag Ag 0 2 - o o 0 3 o - o 1 2 - o o 1 3 o - o 2 3 + - o 
NbNiAg2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two NbNiAg2 clusters. Nb(1) is bonded in a 2-coordinate geometry to two equivalent Ag(1) atoms. Both Nb(1)-Ag(1) bond lengths are 0.43 Å. Ni(1) is bonded in a 2-coordinate geometry to two equivalent Ag(1) atoms. Both Ni(1)-Ag(1) bond lengths are 0.76 Å. Ag(1) is bonded in a 1-coordinate geometry to one Nb(1), one Ni(1), and one Ag(1) atom. The Ag(1)-Ag(1) bond length is 0.28 Å.