<|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_Ni2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.2
_cell_length_b   7.2
_cell_length_c   3.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ni2Pb
_chemical_formula_sum   'Ni6 Pb3'
_cell_volume   140.51
_cell_formula_units_Z   3
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
  Ni  Ni0  1  0.13  0.0  0.56  1.0
  Ni  Ni1  1  0.94  0.84  0.56  1.0
  Ni  Ni2  1  0.54  0.4  0.56  1.0
  Ni  Ni3  1  0.54  0.0  0.0  1.0
  Ni  Ni4  1  0.73  0.93  0.0  1.0
  Ni  Ni5  1  0.33  0.31  0.0  1.0
  Pb  Pb6  1  0.0  0.16  0.56  1.0
  Pb  Pb7  1  0.6  0.08  0.56  1.0
  Pb  Pb8  1  0.0  0.0  0.0  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Ni2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.2
_cell_length_b   7.2
_cell_length_c   3.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ni2Pb
_chemical_formula_sum   'Ni6 Pb3'
_cell_volume   140.51
_cell_formula_units_Z   3
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
  Ni  Ni0  1  0.13  0.0  0.56  1.0
  Ni  Ni1  1  0.94  0.84  0.56  1.0
  Ni  Ni2  1  0.54  0.4  0.56  1.0
  Ni  Ni3  1  0.54  0.0  0.0  1.0
  Ni  Ni4  1  0.73  0.93  0.0  1.0
  Ni  Ni5  1  0.33  0.31  0.0  1.0
  Pb  Pb6  1  0.0  0.16  0.56  1.0
  Pb  Pb7  1  0.6  0.08  0.56  1.0
  Pb  Pb8  1  0.0  0.0  0.0  1.0

What is the crystal system of this material?