<|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_Pt3I2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.54
_cell_length_b   7.54
_cell_length_c   7.54
_cell_angle_alpha   51.76
_cell_angle_beta   51.76
_cell_angle_gamma   51.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Pt3I2
_chemical_formula_sum   'Pt6 I4'
_cell_volume   244.52
_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
  Pt  Pt4  1  0.75  0.7  0.66  1.0
  Pt  Pt5  1  0.75  0.3  0.66  1.0
  Pt  Pt6  1  0.49  0.0  0.66  1.0
  Pt  Pt7  1  0.51  0.0  0.89  1.0
  Pt  Pt8  1  0.25  0.7  0.89  1.0
  Pt  Pt9  1  0.25  0.3  0.89  1.0
  I  I0  1  0.0  0.0  0.53  1.0
  I  I1  1  0.0  0.0  0.24  1.0
  I  I2  1  0.0  0.0  0.3  1.0
  I  I3  1  0.0  0.0  0.01  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Pt3I2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.54
_cell_length_b   7.54
_cell_length_c   7.54
_cell_angle_alpha   51.76
_cell_angle_beta   51.76
_cell_angle_gamma   51.76
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Pt3I2
_chemical_formula_sum   'Pt6 I4'
_cell_volume   244.52
_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
  Pt  Pt4  1  0.75  0.7  0.66  1.0
  Pt  Pt5  1  0.75  0.3  0.66  1.0
  Pt  Pt6  1  0.49  0.0  0.66  1.0
  Pt  Pt7  1  0.51  0.0  0.89  1.0
  Pt  Pt8  1  0.25  0.7  0.89  1.0
  Pt  Pt9  1  0.25  0.3  0.89  1.0
  I  I0  1  0.0  0.0  0.53  1.0
  I  I1  1  0.0  0.0  0.24  1.0
  I  I2  1  0.0  0.0  0.3  1.0
  I  I3  1  0.0  0.0  0.01  1.0

What is the crystal system of this material?