data_RbNb3Ga
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.79
_cell_length_b   4.79
_cell_length_c   4.79
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbNb3Ga
_chemical_formula_sum   'Rb1 Nb3 Ga1'
_cell_volume   110.07
_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
  Rb  Rb4  1  0.4  0.4  0.4  1.0
  Nb  Nb0  1  0.4  0.0  0.4  1.0
  Nb  Nb1  1  0.4  0.4  0.0  1.0
  Nb  Nb2  1  0.0  0.4  0.4  1.0
  Ga  Ga3  1  0.0  0.0  0.0  1.0

data_RbNb3Ga
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.78
_cell_length_b   6.78
_cell_length_c   8.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   RbNb3Ga
_chemical_formula_sum   'Rb3 Nb9 Ga3'
_cell_volume   330.22
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Rb  Rb0  3  0.0  0.0  0.4  1.0
  Nb  Nb1  9  0.07  0.53  0.93  1.0
  Ga  Ga2  3  0.0  0.0  0.0  1.0

Rb Nb Nb Nb Ga
RbNb3Ga crystallizes in the trigonal R3m space group. Rb(1) is bonded in a distorted octahedral geometry to three equivalent Nb(1) atoms. All Rb(1)-Nb(1) bond lengths are 1.90 Å. Nb(1) is bonded in a distorted single-bond geometry to one Rb(1) and three equivalent Ga(1) atoms. There is one shorter (2.69 Å) and two longer (3.46 Å) Nb(1)-Ga(1) bond lengths. Ga(1) is bonded in a 9-coordinate geometry to nine equivalent Nb(1) atoms.