data_ZnAg3Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.82
_cell_length_b   4.82
_cell_length_c   4.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnAg3Ge
_chemical_formula_sum   'Zn1 Ag3 Ge1'
_cell_volume   112.06
_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
  Zn  Zn1  1  0.0  0.0  0.0  1.0
  Ag  Ag2  1  0.0  0.41  0.0  1.0
  Ag  Ag3  1  0.0  0.0  0.41  1.0
  Ag  Ag4  1  0.41  0.0  0.0  1.0
  Ge  Ge0  1  0.41  0.41  0.41  1.0

data_ZnAg3Ge
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.82
_cell_length_b   6.82
_cell_length_c   8.35
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   ZnAg3Ge
_chemical_formula_sum   'Zn3 Ag9 Ge3'
_cell_volume   336.17
_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
  Zn  Zn0  3  0.0  0.0  0.0  1.0
  Ag  Ag1  9  0.2  0.39  0.8  1.0
  Ge  Ge2  3  0.0  0.0  0.41  1.0

Zn Ag Ag Ag Ge
Zn Ag Ag Ag Ge 0 3 o o o 0 2 o o o 0 1 o o o 0 4 o o o 1 4 o o o 1 4 o o - 1 4 - o o 2 4 o o o 2 4 o - o 2 4 - o o 3 4 o o o 3 4 o o - 3 4 o - o 
Ag3ZnGe crystallizes in the trigonal R3m space group. Ag(1) is bonded in a distorted single-bond geometry to two equivalent Zn(1) and one Ge(1) atom. There is one shorter (1.98 Å) and one longer (2.84 Å) Ag(1)-Zn(1) bond length. The Ag(1)-Ge(1) bond length is 2.80 Å. Zn(1) is bonded to six equivalent Ag(1) atoms to form distorted corner-sharing ZnAg6 octahedra. The corner-sharing octahedra are not tilted. Ge(1) is bonded in a 3-coordinate geometry to three equivalent Ag(1) atoms.