<|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_SnPIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.96
_cell_length_b   6.96
_cell_length_c   3.71
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SnPIr
_chemical_formula_sum   'Sn3 P3 Ir3'
_cell_volume   155.7
_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
  Sn  Sn6  1  0.59  0.44  0.0  1.0
  Sn  Sn7  1  0.07  0.59  0.0  1.0
  Sn  Sn8  1  0.82  0.0  0.0  1.0
  P  P3  1  0.4  0.5  0.86  1.0
  P  P4  1  0.88  0.53  0.86  1.0
  P  P5  1  0.19  0.0  0.86  1.0
  Ir  Ir0  1  0.48  0.01  0.86  1.0
  Ir  Ir1  1  0.0  0.02  0.86  1.0
  Ir  Ir2  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_SnPIr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.96
_cell_length_b   6.96
_cell_length_c   3.71
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SnPIr
_chemical_formula_sum   'Sn3 P3 Ir3'
_cell_volume   155.7
_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
  Sn  Sn6  1  0.59  0.44  0.0  1.0
  Sn  Sn7  1  0.07  0.59  0.0  1.0
  Sn  Sn8  1  0.82  0.0  0.0  1.0
  P  P3  1  0.4  0.5  0.86  1.0
  P  P4  1  0.88  0.53  0.86  1.0
  P  P5  1  0.19  0.0  0.86  1.0
  Ir  Ir0  1  0.48  0.01  0.86  1.0
  Ir  Ir1  1  0.0  0.02  0.86  1.0
  Ir  Ir2  1  0.0  0.0  0.0  1.0

What is the crystal system of this material?