<|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_RbZn13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.8
_cell_length_b   8.8
_cell_length_c   8.8
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbZn13
_chemical_formula_sum   'Rb2 Zn26'
_cell_volume   481.85
_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
  Rb  Rb26  1  0.33  0.33  0.33  1.0
  Rb  Rb27  1  0.11  0.11  0.11  1.0
  Zn  Zn0  1  0.0  0.0  0.0  1.0
  Zn  Zn1  1  0.22  0.22  0.22  1.0
  Zn  Zn2  1  0.22  0.24  0.7  1.0
  Zn  Zn3  1  0.74  0.46  0.22  1.0
  Zn  Zn4  1  0.7  0.46  0.22  1.0
  Zn  Zn5  1  0.99  0.22  0.7  1.0
  Zn  Zn6  1  0.46  0.22  0.7  1.0
  Zn  Zn7  1  0.22  0.7  0.99  1.0
  Zn  Zn8  1  0.22  0.74  0.46  1.0
  Zn  Zn9  1  0.21  0.74  0.22  1.0
  Zn  Zn10  1  0.7  0.22  0.21  1.0
  Zn  Zn11  1  0.74  0.22  0.21  1.0
  Zn  Zn12  1  0.24  0.74  0.22  1.0
  Zn  Zn13  1  0.24  0.7  0.22  1.0
  Zn  Zn14  1  0.7  0.22  0.24  1.0
  Zn  Zn15  1  0.21  0.7  0.22  1.0
  Zn  Zn16  1  0.74  0.22  0.24  1.0
  Zn  Zn17  1  0.99  0.22  0.74  1.0
  Zn  Zn18  1  0.7  0.99  0.22  1.0
  Zn  Zn19  1  0.22  0.74  0.99  1.0
  Zn  Zn20  1  0.22  0.7  0.46  1.0
  Zn  Zn21  1  0.74  0.99  0.22  1.0
  Zn  Zn22  1  0.46  0.22  0.74  1.0
  Zn  Zn23  1  0.22  0.24  0.74  1.0
  Zn  Zn24  1  0.22  0.21  0.7  1.0
  Zn  Zn25  1  0.22  0.21  0.74  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_RbZn13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.8
_cell_length_b   8.8
_cell_length_c   8.8
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbZn13
_chemical_formula_sum   'Rb2 Zn26'
_cell_volume   481.85
_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
  Rb  Rb26  1  0.33  0.33  0.33  1.0
  Rb  Rb27  1  0.11  0.11  0.11  1.0
  Zn  Zn0  1  0.0  0.0  0.0  1.0
  Zn  Zn1  1  0.22  0.22  0.22  1.0
  Zn  Zn2  1  0.22  0.24  0.7  1.0
  Zn  Zn3  1  0.74  0.46  0.22  1.0
  Zn  Zn4  1  0.7  0.46  0.22  1.0
  Zn  Zn5  1  0.99  0.22  0.7  1.0
  Zn  Zn6  1  0.46  0.22  0.7  1.0
  Zn  Zn7  1  0.22  0.7  0.99  1.0
  Zn  Zn8  1  0.22  0.74  0.46  1.0
  Zn  Zn9  1  0.21  0.74  0.22  1.0
  Zn  Zn10  1  0.7  0.22  0.21  1.0
  Zn  Zn11  1  0.74  0.22  0.21  1.0
  Zn  Zn12  1  0.24  0.74  0.22  1.0
  Zn  Zn13  1  0.24  0.7  0.22  1.0
  Zn  Zn14  1  0.7  0.22  0.24  1.0
  Zn  Zn15  1  0.21  0.7  0.22  1.0
  Zn  Zn16  1  0.74  0.22  0.24  1.0
  Zn  Zn17  1  0.99  0.22  0.74  1.0
  Zn  Zn18  1  0.7  0.99  0.22  1.0
  Zn  Zn19  1  0.22  0.74  0.99  1.0
  Zn  Zn20  1  0.22  0.7  0.46  1.0
  Zn  Zn21  1  0.74  0.99  0.22  1.0
  Zn  Zn22  1  0.46  0.22  0.74  1.0
  Zn  Zn23  1  0.22  0.24  0.74  1.0
  Zn  Zn24  1  0.22  0.21  0.7  1.0
  Zn  Zn25  1  0.22  0.21  0.74  1.0

What is the crystal system of this material?