data_AlNi2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.04
_cell_length_b   4.04
_cell_length_c   3.01
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AlNi2Ge
_chemical_formula_sum   'Al1 Ni2 Ge1'
_cell_volume   49.26
_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
  Al  Al0  1  0.0  0.0  0.0  1.0
  Ni  Ni2  1  0.02  0.0  0.51  1.0
  Ni  Ni3  1  0.0  0.02  0.51  1.0
  Ge  Ge1  1  0.02  0.02  0.0  1.0

data_AlNi2Ge
_symmetry_space_group_name_H-M   Amm2
_cell_length_a   3.01
_cell_length_b   5.72
_cell_length_c   5.72
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   38
_chemical_formula_structural   AlNi2Ge
_chemical_formula_sum   'Al2 Ni4 Ge2'
_cell_volume   98.51
_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, y, z'
  4  'x, -y, z'
  5  'x, y+1/2, z+1/2'
  6  '-x, -y+1/2, z+1/2'
  7  '-x, y+1/2, z+1/2'
  8  'x, -y+1/2, z+1/2'
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
  Al  Al0  2  0.0  0.0  0.0  1.0
  Ni  Ni1  4  0.5  0.01  0.01  1.0
  Ge  Ge2  2  0.0  0.0  0.02  1.0

Al Ni Ni Ge
Al Ni Ni Ge 0 3 o o o 1 2 o o o 
(Ni)2AlGe is alpha carbon monoxide-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two aluminum;germanium molecules and two nickel molecules.