data_Al2GePt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.19
_cell_length_b   4.19
_cell_length_c   3.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2GePt
_chemical_formula_sum   'Al2 Ge1 Pt1'
_cell_volume   63.89
_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  0.1  0.0  0.82  1.0
  Al  Al1  1  0.0  0.1  0.82  1.0
  Ge  Ge2  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.1  0.1  0.0  1.0

data_Al2GePt
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.93
_cell_length_b   5.93
_cell_length_c   3.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Al2GePt
_chemical_formula_sum   'Al4 Ge2 Pt2'
_cell_volume   127.77
_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
  Al  Al0  4  0.05  0.05  0.82  1.0
  Ge  Ge1  2  0.0  0.0  0.0  1.0
  Pt  Pt2  2  0.1  0.0  -0.0  1.0

Al Al Ge Pt
PtAl2Ge is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two PtAl2Ge clusters. Pt(1) is bonded in a 3-coordinate geometry to two equivalent Al(1) and one Ge(1) atom. Both Pt(1)-Al(1) bond lengths are 0.78 Å. The Pt(1)-Ge(1) bond length is 0.57 Å. Al(1) is bonded in a 3-coordinate geometry to one Pt(1), one Al(1), and one Ge(1) atom. The Al(1)-Al(1) bond length is 0.57 Å. The Al(1)-Ge(1) bond length is 0.78 Å. Ge(1) is bonded in a distorted single-bond geometry to one Pt(1) and two equivalent Al(1) atoms.