<|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_Sr3P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.28
_cell_length_b   7.28
_cell_length_c   11.66
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr3P
_chemical_formula_sum   'Sr12 P4'
_cell_volume   534.52
_cell_formula_units_Z   4
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
  Sr  Sr4  1  0.18  0.15  0.83  1.0
  Sr  Sr5  1  0.18  0.15  0.0  1.0
  Sr  Sr6  1  0.82  0.15  0.83  1.0
  Sr  Sr7  1  0.64  0.0  0.83  1.0
  Sr  Sr8  1  0.64  0.0  0.0  1.0
  Sr  Sr9  1  0.82  0.15  0.0  1.0
  Sr  Sr10  1  0.91  0.31  0.74  1.0
  Sr  Sr11  1  0.72  1.0  0.91  1.0
  Sr  Sr12  1  0.09  0.31  0.74  1.0
  Sr  Sr13  1  0.0  0.99  0.74  1.0
  Sr  Sr14  1  0.64  0.31  0.91  1.0
  Sr  Sr15  1  0.55  1.0  0.91  1.0
  P  P0  1  0.0  0.0  0.83  1.0
  P  P1  1  0.0  0.0  0.0  1.0
  P  P2  1  0.64  0.1  0.74  1.0
  P  P3  1  0.0  0.2  0.91  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Sr3P
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.28
_cell_length_b   7.28
_cell_length_c   11.66
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr3P
_chemical_formula_sum   'Sr12 P4'
_cell_volume   534.52
_cell_formula_units_Z   4
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
  Sr  Sr4  1  0.18  0.15  0.83  1.0
  Sr  Sr5  1  0.18  0.15  0.0  1.0
  Sr  Sr6  1  0.82  0.15  0.83  1.0
  Sr  Sr7  1  0.64  0.0  0.83  1.0
  Sr  Sr8  1  0.64  0.0  0.0  1.0
  Sr  Sr9  1  0.82  0.15  0.0  1.0
  Sr  Sr10  1  0.91  0.31  0.74  1.0
  Sr  Sr11  1  0.72  1.0  0.91  1.0
  Sr  Sr12  1  0.09  0.31  0.74  1.0
  Sr  Sr13  1  0.0  0.99  0.74  1.0
  Sr  Sr14  1  0.64  0.31  0.91  1.0
  Sr  Sr15  1  0.55  1.0  0.91  1.0
  P  P0  1  0.0  0.0  0.83  1.0
  P  P1  1  0.0  0.0  0.0  1.0
  P  P2  1  0.64  0.1  0.74  1.0
  P  P3  1  0.0  0.2  0.91  1.0

What is the crystal system of this material?