data_MgBeW2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.76
_cell_length_b   3.76
_cell_length_c   4.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgBeW2
_chemical_formula_sum   'Mg1 Be1 W2'
_cell_volume   60.2
_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
  Mg  Mg1  1  0.88  0.88  0.0  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  W  W2  1  0.88  0.0  0.13  1.0
  W  W3  1  0.0  0.88  0.13  1.0

data_MgBeW2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.31
_cell_length_b   5.31
_cell_length_c   4.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgBeW2
_chemical_formula_sum   'Mg2 Be2 W4'
_cell_volume   120.4
_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
  Mg  Mg0  2  0.38  0.5  -0.0  1.0
  Be  Be1  2  0.0  0.0  0.0  1.0
  W  W2  4  0.44  0.44  0.13  1.0

Mg Be W W
Mg Be W W 0 1 + + o 0 3 + o o 0 2 o + o 1 2 - o o 1 3 o - o 2 3 + - o 