data_NbAg2Br
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.92
_cell_length_b   4.92
_cell_length_c   3.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbAg2Br
_chemical_formula_sum   'Nb1 Ag2 Br1'
_cell_volume   79.15
_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  Nb3  1  0.46  0.46  0.0  1.0
  Ag  Ag0  1  0.46  0.0  0.63  1.0
  Ag  Ag1  1  0.0  0.46  0.63  1.0
  Br  Br2  1  0.0  0.0  0.0  1.0

data_NbAg2Br
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.96
_cell_length_b   6.96
_cell_length_c   3.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NbAg2Br
_chemical_formula_sum   'Nb2 Ag4 Br2'
_cell_volume   158.3
_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  0.46  0.0  0.0  1.0
  Ag  Ag1  4  0.23  0.23  0.63  1.0
  Br  Br2  2  0.0  0.0  0.0  1.0

Nb Ag Ag Br
NbAg2Br crystallizes in the monoclinic Cm space group. Nb(1) is bonded in a 4-coordinate geometry to four equivalent Ag(1) atoms. There are two shorter (2.57 Å) and two longer (2.91 Å) Nb(1)-Ag(1) bond lengths. Ag(1) is bonded in a 3-coordinate geometry to two equivalent Nb(1) and three equivalent Br(1) atoms. There are a spread of Ag(1)-Br(1) bond distances ranging from 2.57-3.07 Å. Br(1) is bonded in a 6-coordinate geometry to six equivalent Ag(1) atoms.