<|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_BaTi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.69
_cell_length_b   8.69
_cell_length_c   4.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   150.68
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaTi2
_chemical_formula_sum   'Ba2 Ti4'
_cell_volume   156.54
_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
  Ba  Ba0  1  0.2  0.7  0.18  1.0
  Ba  Ba1  1  0.2  0.3  0.06  1.0
  Ti  Ti2  1  0.2  0.88  0.18  1.0
  Ti  Ti3  1  0.2  0.12  0.06  1.0
  Ti  Ti4  1  0.2  0.77  0.18  1.0
  Ti  Ti5  1  0.2  0.23  0.06  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_BaTi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.69
_cell_length_b   8.69
_cell_length_c   4.24
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   150.68
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaTi2
_chemical_formula_sum   'Ba2 Ti4'
_cell_volume   156.54
_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
  Ba  Ba0  1  0.2  0.7  0.18  1.0
  Ba  Ba1  1  0.2  0.3  0.06  1.0
  Ti  Ti2  1  0.2  0.88  0.18  1.0
  Ti  Ti3  1  0.2  0.12  0.06  1.0
  Ti  Ti4  1  0.2  0.77  0.18  1.0
  Ti  Ti5  1  0.2  0.23  0.06  1.0

What is the crystal system of this material?