data_NbCrGe4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.24
_cell_length_b   5.24
_cell_length_c   5.24
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NbCrGe4
_chemical_formula_sum   'Nb1 Cr1 Ge4'
_cell_volume   101.6
_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  Nb5  1  0.56  0.56  0.56  1.0
  Cr  Cr0  1  0.0  0.0  0.0  1.0
  Ge  Ge1  1  0.63  0.63  0.77  1.0
  Ge  Ge2  1  0.63  0.77  0.63  1.0
  Ge  Ge3  1  0.77  0.63  0.63  1.0
  Ge  Ge4  1  0.77  0.77  0.77  1.0

data_NbCrGe4
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.24
_cell_length_b   5.24
_cell_length_c   12.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   NbCrGe4
_chemical_formula_sum   'Nb3 Cr3 Ge12'
_cell_volume   304.79
_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
  Nb  Nb0  3  0.0  0.0  0.44  1.0
  Cr  Cr1  3  0.0  0.0  0.0  1.0
  Ge  Ge2  9  0.05  0.1  0.32  1.0
  Ge  Ge3  3  0.0  0.0  0.23  1.0

Nb Cr Ge Ge Ge Ge
Nb Cr Ge Ge Ge Ge 0 4 o o o 0 3 o o o 0 2 o o o 0 1 + + o 0 1 + o + 0 1 o + + 1 5 - - - 1 5 - - o 1 5 o - - 1 5 - o - 1 4 - - o 1 4 - o - 1 4 o - - 1 3 - - o 1 3 - o - 1 3 o - - 1 2 - - o 1 2 - o - 1 2 o - - 2 4 o o o 2 3 o o o 2 5 o o o 3 4 o o o 3 5 o o o 4 5 o o o 
NbCrGe4 crystallizes in the trigonal R3m space group. Nb(1) is bonded in a 6-coordinate geometry to three equivalent Ge(1) and three equivalent Ge(2) atoms. All Nb(1)-Ge(1) bond lengths are 1.65 Å. All Nb(1)-Ge(2) bond lengths are 3.36 Å. Cr(1) is bonded to one Ge(2) and six equivalent Ge(1) atoms to form distorted corner-sharing CrGe7 hexagonal pyramids. The Cr(1)-Ge(2) bond length is 2.89 Å. All Cr(1)-Ge(1) bond lengths are 2.84 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(2) is bonded in a 7-coordinate geometry to three equivalent Nb(1), one Cr(1), and three equivalent Ge(1) atoms. All Ge(2)-Ge(1) bond lengths are 1.30 Å. In the second Ge site, Ge(1) is bonded in a 2-coordinate geometry to one Nb(1), two equivalent Cr(1), one Ge(2), and two equivalent Ge(1) atoms. Both Ge(1)-Ge(1) bond lengths are 0.75 Å.