<|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_BaMn2TlO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   23.56
_cell_length_b   23.56
_cell_length_c   3.72
_cell_angle_alpha   94.28
_cell_angle_beta   94.28
_cell_angle_gamma   9.06
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaMn2TlO6
_chemical_formula_sum   'Ba2 Mn4 Tl2 O12'
_cell_volume   323.87
_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  0.35  0.0  0.14  1.0
  Ba  Ba1  1  0.49  0.0  0.62  1.0
  Mn  Mn2  1  0.88  0.0  0.76  1.0
  Mn  Mn3  1  0.45  0.0  0.29  1.0
  Mn  Mn4  1  0.37  0.0  0.46  1.0
  Mn  Mn5  1  0.17  0.0  0.96  1.0
  Tl  Tl6  1  0.96  0.0  0.06  1.0
  Tl  Tl7  1  0.89  0.0  0.72  1.0
  O  O8  1  0.4  0.0  0.32  1.0
  O  O9  1  0.07  0.0  0.7  1.0
  O  O10  1  0.99  0.0  0.85  1.0
  O  O11  1  0.36  0.0  0.1  1.0
  O  O12  1  0.86  0.0  0.86  1.0
  O  O13  1  0.79  0.0  0.28  1.0
  O  O14  1  0.42  0.0  0.43  1.0
  O  O15  1  0.87  0.0  0.55  1.0
  O  O16  1  0.03  0.0  0.47  1.0
  O  O17  1  0.4  0.0  0.58  1.0
  O  O18  1  0.65  0.0  0.95  1.0
  O  O19  1  0.98  0.0  0.2  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_BaMn2TlO6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   23.56
_cell_length_b   23.56
_cell_length_c   3.72
_cell_angle_alpha   94.28
_cell_angle_beta   94.28
_cell_angle_gamma   9.06
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaMn2TlO6
_chemical_formula_sum   'Ba2 Mn4 Tl2 O12'
_cell_volume   323.87
_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  0.35  0.0  0.14  1.0
  Ba  Ba1  1  0.49  0.0  0.62  1.0
  Mn  Mn2  1  0.88  0.0  0.76  1.0
  Mn  Mn3  1  0.45  0.0  0.29  1.0
  Mn  Mn4  1  0.37  0.0  0.46  1.0
  Mn  Mn5  1  0.17  0.0  0.96  1.0
  Tl  Tl6  1  0.96  0.0  0.06  1.0
  Tl  Tl7  1  0.89  0.0  0.72  1.0
  O  O8  1  0.4  0.0  0.32  1.0
  O  O9  1  0.07  0.0  0.7  1.0
  O  O10  1  0.99  0.0  0.85  1.0
  O  O11  1  0.36  0.0  0.1  1.0
  O  O12  1  0.86  0.0  0.86  1.0
  O  O13  1  0.79  0.0  0.28  1.0
  O  O14  1  0.42  0.0  0.43  1.0
  O  O15  1  0.87  0.0  0.55  1.0
  O  O16  1  0.03  0.0  0.47  1.0
  O  O17  1  0.4  0.0  0.58  1.0
  O  O18  1  0.65  0.0  0.95  1.0
  O  O19  1  0.98  0.0  0.2  1.0

What is the crystal system of this material?