<|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_Si6NiMo9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.22
_cell_length_b   7.22
_cell_length_c   7.22
_cell_angle_alpha   96.69
_cell_angle_beta   96.69
_cell_angle_gamma   140.08
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si6NiMo9
_chemical_formula_sum   'Si6 Ni1 Mo9'
_cell_volume   227.29
_cell_formula_units_Z   1
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  0.54  0.46  0.8  1.0
  Si  Si1  1  0.46  0.54  0.8  1.0
  Si  Si2  1  0.26  0.26  0.66  1.0
  Si  Si3  1  0.54  0.54  0.13  1.0
  Si  Si4  1  0.0  0.8  0.0  1.0
  Si  Si5  1  0.8  0.0  0.0  1.0
  Ni  Ni6  1  0.0  0.0  0.0  1.0
  Mo  Mo7  1  0.16  0.05  0.23  1.0
  Mo  Mo8  1  0.84  0.55  0.23  1.0
  Mo  Mo9  1  0.65  0.25  0.24  1.0
  Mo  Mo10  1  0.96  0.75  0.24  1.0
  Mo  Mo11  1  0.75  0.96  0.24  1.0
  Mo  Mo12  1  0.25  0.65  0.24  1.0
  Mo  Mo13  1  0.55  0.84  0.23  1.0
  Mo  Mo14  1  0.05  0.16  0.23  1.0
  Mo  Mo15  1  0.0  0.0  0.47  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Si6NiMo9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.22
_cell_length_b   7.22
_cell_length_c   7.22
_cell_angle_alpha   96.69
_cell_angle_beta   96.69
_cell_angle_gamma   140.08
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si6NiMo9
_chemical_formula_sum   'Si6 Ni1 Mo9'
_cell_volume   227.29
_cell_formula_units_Z   1
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  0.54  0.46  0.8  1.0
  Si  Si1  1  0.46  0.54  0.8  1.0
  Si  Si2  1  0.26  0.26  0.66  1.0
  Si  Si3  1  0.54  0.54  0.13  1.0
  Si  Si4  1  0.0  0.8  0.0  1.0
  Si  Si5  1  0.8  0.0  0.0  1.0
  Ni  Ni6  1  0.0  0.0  0.0  1.0
  Mo  Mo7  1  0.16  0.05  0.23  1.0
  Mo  Mo8  1  0.84  0.55  0.23  1.0
  Mo  Mo9  1  0.65  0.25  0.24  1.0
  Mo  Mo10  1  0.96  0.75  0.24  1.0
  Mo  Mo11  1  0.75  0.96  0.24  1.0
  Mo  Mo12  1  0.25  0.65  0.24  1.0
  Mo  Mo13  1  0.55  0.84  0.23  1.0
  Mo  Mo14  1  0.05  0.16  0.23  1.0
  Mo  Mo15  1  0.0  0.0  0.47  1.0

What is the crystal system of this material?