data_Al2Mo
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.92
_cell_length_b   4.92
_cell_length_c   4.54
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   56.61
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2Mo
_chemical_formula_sum   'Al4 Mo2'
_cell_volume   91.84
_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
  Al  Al0  1  0.77  0.16  0.14  1.0
  Al  Al1  1  0.9  0.84  0.41  1.0
  Al  Al2  1  0.9  0.16  0.14  1.0
  Al  Al3  1  0.77  0.84  0.41  1.0
  Mo  Mo4  1  0.33  0.49  0.14  1.0
  Mo  Mo5  1  0.33  0.51  0.41  1.0

data_Al2Mo
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.54
_cell_length_b   4.67
_cell_length_c   4.92
_cell_angle_alpha   118.31
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Al2Mo
_chemical_formula_sum   'Al4 Mo2'
_cell_volume   91.84
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  2  0.36  0.16  0.1  1.0
  Al  Al1  2  0.36  0.16  0.23  1.0
  Mo  Mo2  2  0.36  0.49  0.99  1.0

Al Al Al Al Mo Mo
Al Al Al Al Mo Mo 0 2 o o o 1 3 o o o 4 5 o o o 
Al2Mo is Hg_xSn structured and crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one Al2Mo cluster. Mo(1) is bonded in a distorted L-shaped geometry to one Mo(1) and one Al(1) atom. The Mo(1)-Mo(1) bond length is 1.23 Å. The Mo(1)-Al(1) bond length is 1.84 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 2-coordinate geometry to one Mo(1) and one Al(2) atom. The Al(1)-Al(2) bond length is 0.66 Å. In the second Al site, Al(2) is bonded in a single-bond geometry to one Al(1) atom.