<|im_start|>system
Please reason step by step, and put your final answer within \boxed{}.<|im_end|>
<|im_start|>user
Given the following CIF representation:
data_Al2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.64
_cell_length_b   5.64
_cell_length_c   9.01
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2Sn
_chemical_formula_sum   'Al8 Sn4'
_cell_volume   247.88
_cell_formula_units_Z   4
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  0.5  1.0
  Al  Al1  1  0.0  0.0  0.0  1.0
  Al  Al2  1  0.38  0.05  0.76  1.0
  Al  Al3  1  0.43  0.83  0.25  1.0
  Al  Al4  1  0.62  0.05  0.76  1.0
  Al  Al5  1  0.0  0.65  0.76  1.0
  Al  Al6  1  0.82  0.23  0.25  1.0
  Al  Al7  1  0.2  0.83  0.25  1.0
  Sn  Sn8  1  0.82  0.63  0.1  1.0
  Sn  Sn9  1  0.0  0.25  0.59  1.0
  Sn  Sn10  1  0.0  0.25  0.91  1.0
  Sn  Sn11  1  0.82  0.63  0.42  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Al2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.64
_cell_length_b   5.64
_cell_length_c   9.01
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2Sn
_chemical_formula_sum   'Al8 Sn4'
_cell_volume   247.88
_cell_formula_units_Z   4
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  0.5  1.0
  Al  Al1  1  0.0  0.0  0.0  1.0
  Al  Al2  1  0.38  0.05  0.76  1.0
  Al  Al3  1  0.43  0.83  0.25  1.0
  Al  Al4  1  0.62  0.05  0.76  1.0
  Al  Al5  1  0.0  0.65  0.76  1.0
  Al  Al6  1  0.82  0.23  0.25  1.0
  Al  Al7  1  0.2  0.83  0.25  1.0
  Sn  Sn8  1  0.82  0.63  0.1  1.0
  Sn  Sn9  1  0.0  0.25  0.59  1.0
  Sn  Sn10  1  0.0  0.25  0.91  1.0
  Sn  Sn11  1  0.82  0.63  0.42  1.0

What is the crystal system of this material?