data_Mn2Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.74
_cell_length_b   5.74
_cell_length_c   3.83
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   147.09
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mn2Si
_chemical_formula_sum   'Mn4 Si2'
_cell_volume   68.67
_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
  Mn  Mn0  1  0.63  0.81  0.96  1.0
  Mn  Mn1  1  0.63  0.19  0.87  1.0
  Mn  Mn2  1  0.63  0.18  0.96  1.0
  Mn  Mn3  1  0.63  0.82  0.87  1.0
  Si  Si4  1  0.63  0.48  0.96  1.0
  Si  Si5  1  0.63  0.52  0.87  1.0

data_Mn2Si
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.25
_cell_length_b   3.83
_cell_length_c   5.74
_cell_angle_alpha   90.0
_cell_angle_beta   106.45
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Mn2Si
_chemical_formula_sum   'Mn4 Si2'
_cell_volume   68.67
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Mn  Mn0  2  0.18  0.96  0.18  1.0
  Mn  Mn1  2  0.19  0.04  0.19  1.0
  Si  Si2  2  0.48  0.96  0.48  1.0

Mn Mn Mn Mn Si Si