<|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_Y3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.3
_cell_length_b   6.3
_cell_length_c   5.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   79.87
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y3Si
_chemical_formula_sum   'Y6 Si2'
_cell_volume   215.27
_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
  Y  Y2  1  0.83  0.76  0.13  1.0
  Y  Y3  1  0.83  0.24  0.38  1.0
  Y  Y4  1  0.69  0.03  0.13  1.0
  Y  Y5  1  0.97  0.97  0.38  1.0
  Y  Y6  1  0.97  0.03  0.13  1.0
  Y  Y7  1  0.69  0.97  0.38  1.0
  Si  Si0  1  0.83  0.33  0.38  1.0
  Si  Si1  1  0.83  0.67  0.13  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Y3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.3
_cell_length_b   6.3
_cell_length_c   5.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   79.87
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Y3Si
_chemical_formula_sum   'Y6 Si2'
_cell_volume   215.27
_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
  Y  Y2  1  0.83  0.76  0.13  1.0
  Y  Y3  1  0.83  0.24  0.38  1.0
  Y  Y4  1  0.69  0.03  0.13  1.0
  Y  Y5  1  0.97  0.97  0.38  1.0
  Y  Y6  1  0.97  0.03  0.13  1.0
  Y  Y7  1  0.69  0.97  0.38  1.0
  Si  Si0  1  0.83  0.33  0.38  1.0
  Si  Si1  1  0.83  0.67  0.13  1.0

What is the crystal system of this material?