<|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_LaMgSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.26
_cell_length_b   6.26
_cell_length_c   6.26
_cell_angle_alpha   138.8
_cell_angle_beta   135.91
_cell_angle_gamma   61.92
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaMgSn2
_chemical_formula_sum   'La1 Mg1 Sn2'
_cell_volume   110.94
_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
  La  La0  1  0.2  0.0  0.28  1.0
  Mg  Mg1  1  0.0  0.0  0.04  1.0
  Sn  Sn2  1  0.2  0.0  0.19  1.0
  Sn  Sn3  1  0.0  0.0  0.58  1.0

What is the crystal system of this material?<|im_end|>
<|im_start|>assistant
Given the following CIF representation:
data_LaMgSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.26
_cell_length_b   6.26
_cell_length_c   6.26
_cell_angle_alpha   138.8
_cell_angle_beta   135.91
_cell_angle_gamma   61.92
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaMgSn2
_chemical_formula_sum   'La1 Mg1 Sn2'
_cell_volume   110.94
_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
  La  La0  1  0.2  0.0  0.28  1.0
  Mg  Mg1  1  0.0  0.0  0.04  1.0
  Sn  Sn2  1  0.2  0.0  0.19  1.0
  Sn  Sn3  1  0.0  0.0  0.58  1.0

What is the crystal system of this material?