data_BeSn2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.13
_cell_length_b   5.13
_cell_length_c   5.13
_cell_angle_alpha   126.02
_cell_angle_beta   126.02
_cell_angle_gamma   79.86
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeSn2As
_chemical_formula_sum   'Be1 Sn2 As1'
_cell_volume   85.32
_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
  Be  Be1  1  0.0  0.0  0.0  1.0
  Sn  Sn2  1  0.33  0.0  0.97  1.0
  Sn  Sn3  1  0.0  0.33  0.97  1.0
  As  As0  1  0.0  0.0  0.93  1.0

data_BeSn2As
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.59
_cell_length_b   6.59
_cell_length_c   5.13
_cell_angle_alpha   90.0
_cell_angle_beta   129.93
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeSn2As
_chemical_formula_sum   'Be2 Sn4 As2'
_cell_volume   170.63
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Be  Be0  2  0.0  0.0  0.0  1.0
  Sn  Sn1  4  0.34  0.34  0.64  1.0
  As  As2  2  0.0  0.0  0.93  1.0

Be Sn Sn As
Be Sn Sn As 0 3 o o - 0 1 o o - 0 2 o o - 1 3 o o o 2 3 o o o 