The crystal structure described by La2Al2Ge crystallizes in the orthorhombic Cmcm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to two equivalent Al(1) and five equivalent Ge(1) atoms. In the second La site, La(2) is bonded to four equivalent Al(1), six equivalent Al(2), and two equivalent Ge(1) atoms to form a mixture of edge and face-sharing LaAl10Ge2 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent La(1), four equivalent La(2), one Al(2), and two equivalent Ge(1) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to six equivalent La(2), one Al(1), and two equivalent Al(2) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent La(2), five equivalent La(1), and two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_La2Al2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.165
_cell_length_b   4.579
_cell_length_c   13.700
_cell_angle_alpha   90.000
_cell_angle_beta   98.743
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   258.224
_cell_formula_units_Z   2
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
  La  La0  1  0.205  0.750  0.410  1.0
  La  La1  1  0.795  0.250  0.590  1.0
  La  La2  1  0.575  0.750  0.150  1.0
  La  La3  1  0.425  0.250  0.850  1.0
  Al  Al4  1  0.881  0.750  0.762  1.0
  Al  Al5  1  0.119  0.250  0.238  1.0
  Al  Al6  1  0.977  0.750  0.953  1.0
  Al  Al7  1  0.023  0.250  0.047  1.0
  Ge  Ge8  1  0.327  0.750  0.653  1.0
  Ge  Ge9  1  0.673  0.250  0.347  1.0
[/CIF]
.
The crystal structure described by La2Al2Ge crystallizes in the orthorhombic Cmcm space group. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to two equivalent Al(1) and five equivalent Ge(1) atoms. In the second La site, La(2) is bonded to four equivalent Al(1), six equivalent Al(2), and two equivalent Ge(1) atoms to form a mixture of edge and face-sharing LaAl10Ge2 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent La(1), four equivalent La(2), one Al(2), and two equivalent Ge(1) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to six equivalent La(2), one Al(1), and two equivalent Al(2) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent La(2), five equivalent La(1), and two equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_La2Al2Ge
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.165
_cell_length_b   4.579
_cell_length_c   13.700
_cell_angle_alpha   90.000
_cell_angle_beta   98.743
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   258.224
_cell_formula_units_Z   2
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
  La  La0  1  0.205  0.750  0.410  1.0
  La  La1  1  0.795  0.250  0.590  1.0
  La  La2  1  0.575  0.750  0.150  1.0
  La  La3  1  0.425  0.250  0.850  1.0
  Al  Al4  1  0.881  0.750  0.762  1.0
  Al  Al5  1  0.119  0.250  0.238  1.0
  Al  Al6  1  0.977  0.750  0.953  1.0
  Al  Al7  1  0.023  0.250  0.047  1.0
  Ge  Ge8  1  0.327  0.750  0.653  1.0
  Ge  Ge9  1  0.673  0.250  0.347  1.0
[/CIF]
.