<|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_NaCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.97
_cell_length_b   4.97
_cell_length_c   12.4
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCr
_chemical_formula_sum   'Na6 Cr6'
_cell_volume   265.25
_cell_formula_units_Z   6
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
  Na  Na6  1  0.0  0.0  0.7  1.0
  Na  Na7  1  0.0  0.0  0.69  1.0
  Na  Na8  1  0.0  0.87  0.72  1.0
  Na  Na9  1  0.0  0.87  0.87  1.0
  Na  Na10  1  0.49  0.43  0.52  1.0
  Na  Na11  1  0.49  0.43  0.67  1.0
  Cr  Cr0  1  0.0  0.0  0.78  1.0
  Cr  Cr1  1  0.0  0.0  0.61  1.0
  Cr  Cr2  1  0.0  0.87  0.49  1.0
  Cr  Cr3  1  0.0  0.87  0.64  1.0
  Cr  Cr4  1  0.49  0.43  0.75  1.0
  Cr  Cr5  1  0.49  0.43  0.9  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_NaCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.97
_cell_length_b   4.97
_cell_length_c   12.4
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCr
_chemical_formula_sum   'Na6 Cr6'
_cell_volume   265.25
_cell_formula_units_Z   6
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
  Na  Na6  1  0.0  0.0  0.7  1.0
  Na  Na7  1  0.0  0.0  0.69  1.0
  Na  Na8  1  0.0  0.87  0.72  1.0
  Na  Na9  1  0.0  0.87  0.87  1.0
  Na  Na10  1  0.49  0.43  0.52  1.0
  Na  Na11  1  0.49  0.43  0.67  1.0
  Cr  Cr0  1  0.0  0.0  0.78  1.0
  Cr  Cr1  1  0.0  0.0  0.61  1.0
  Cr  Cr2  1  0.0  0.87  0.49  1.0
  Cr  Cr3  1  0.0  0.87  0.64  1.0
  Cr  Cr4  1  0.49  0.43  0.75  1.0
  Cr  Cr5  1  0.49  0.43  0.9  1.0

What is the crystal system of this material?