<|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_Li2Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.24
_cell_length_b   5.24
_cell_length_c   6.54
_cell_angle_alpha   105.19
_cell_angle_beta   105.19
_cell_angle_gamma   29.91
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2Cu
_chemical_formula_sum   'Li4 Cu2'
_cell_volume   86.22
_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
  Li  Li2  1  0.2  0.0  0.2  1.0
  Li  Li3  1  0.46  0.0  0.69  1.0
  Li  Li4  1  0.55  0.0  0.82  1.0
  Li  Li5  1  0.56  0.0  0.03  1.0
  Cu  Cu0  1  0.03  0.0  0.06  1.0
  Cu  Cu1  1  0.12  0.0  0.04  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_Li2Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.24
_cell_length_b   5.24
_cell_length_c   6.54
_cell_angle_alpha   105.19
_cell_angle_beta   105.19
_cell_angle_gamma   29.91
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Li2Cu
_chemical_formula_sum   'Li4 Cu2'
_cell_volume   86.22
_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
  Li  Li2  1  0.2  0.0  0.2  1.0
  Li  Li3  1  0.46  0.0  0.69  1.0
  Li  Li4  1  0.55  0.0  0.82  1.0
  Li  Li5  1  0.56  0.0  0.03  1.0
  Cu  Cu0  1  0.03  0.0  0.06  1.0
  Cu  Cu1  1  0.12  0.0  0.04  1.0

What is the crystal system of this material?