<|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_Cr4Pb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.72
_cell_length_b   8.72
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cr4Pb5
_chemical_formula_sum   'Cr8 Pb10'
_cell_volume   425.58
_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
  Cr  Cr0  1  0.0  0.0  0.23  1.0
  Cr  Cr1  1  0.0  0.0  0.0  1.0
  Cr  Cr2  1  0.59  0.76  0.84  1.0
  Cr  Cr3  1  0.54  0.0  0.84  1.0
  Cr  Cr4  1  0.23  0.8  0.84  1.0
  Cr  Cr5  1  0.77  0.8  0.61  1.0
  Cr  Cr6  1  0.18  0.0  0.61  1.0
  Cr  Cr7  1  0.41  0.76  0.61  1.0
  Pb  Pb8  1  0.09  0.35  0.84  1.0
  Pb  Pb9  1  0.55  0.0  0.84  1.0
  Pb  Pb10  1  0.73  0.21  0.84  1.0
  Pb  Pb11  1  0.27  0.21  0.61  1.0
  Pb  Pb12  1  0.18  0.0  0.61  1.0
  Pb  Pb13  1  0.91  0.35  0.61  1.0
  Pb  Pb14  1  0.0  0.04  0.23  1.0
  Pb  Pb15  1  0.36  0.52  0.0  1.0
  Pb  Pb16  1  0.36  0.52  0.23  1.0
  Pb  Pb17  1  0.0  0.04  0.0  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Cr4Pb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.72
_cell_length_b   8.72
_cell_length_c   6.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cr4Pb5
_chemical_formula_sum   'Cr8 Pb10'
_cell_volume   425.58
_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
  Cr  Cr0  1  0.0  0.0  0.23  1.0
  Cr  Cr1  1  0.0  0.0  0.0  1.0
  Cr  Cr2  1  0.59  0.76  0.84  1.0
  Cr  Cr3  1  0.54  0.0  0.84  1.0
  Cr  Cr4  1  0.23  0.8  0.84  1.0
  Cr  Cr5  1  0.77  0.8  0.61  1.0
  Cr  Cr6  1  0.18  0.0  0.61  1.0
  Cr  Cr7  1  0.41  0.76  0.61  1.0
  Pb  Pb8  1  0.09  0.35  0.84  1.0
  Pb  Pb9  1  0.55  0.0  0.84  1.0
  Pb  Pb10  1  0.73  0.21  0.84  1.0
  Pb  Pb11  1  0.27  0.21  0.61  1.0
  Pb  Pb12  1  0.18  0.0  0.61  1.0
  Pb  Pb13  1  0.91  0.35  0.61  1.0
  Pb  Pb14  1  0.0  0.04  0.23  1.0
  Pb  Pb15  1  0.36  0.52  0.0  1.0
  Pb  Pb16  1  0.36  0.52  0.23  1.0
  Pb  Pb17  1  0.0  0.04  0.0  1.0

What is the crystal system of this material?