<|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_SiNiN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.72
_cell_length_b   2.72
_cell_length_c   11.72
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiNiN2
_chemical_formula_sum   'Si2 Ni2 N4'
_cell_volume   75.25
_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
  Si  Si0  1  0.0  0.57  0.93  1.0
  Si  Si1  1  0.36  0.79  0.79  1.0
  Ni  Ni2  1  0.0  0.0  0.0  1.0
  Ni  Ni3  1  0.0  0.0  0.86  1.0
  N  N4  1  0.0  0.0  0.9  1.0
  N  N5  1  0.0  0.0  0.82  1.0
  N  N6  1  0.0  0.0  0.04  1.0
  N  N7  1  0.0  0.0  0.68  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_SiNiN2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.72
_cell_length_b   2.72
_cell_length_c   11.72
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiNiN2
_chemical_formula_sum   'Si2 Ni2 N4'
_cell_volume   75.25
_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
  Si  Si0  1  0.0  0.57  0.93  1.0
  Si  Si1  1  0.36  0.79  0.79  1.0
  Ni  Ni2  1  0.0  0.0  0.0  1.0
  Ni  Ni3  1  0.0  0.0  0.86  1.0
  N  N4  1  0.0  0.0  0.9  1.0
  N  N5  1  0.0  0.0  0.82  1.0
  N  N6  1  0.0  0.0  0.04  1.0
  N  N7  1  0.0  0.0  0.68  1.0

What is the crystal system of this material?