[CIF]
data_Mg2AsSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.49663590
_cell_length_b   3.49663590
_cell_length_c   7.35006137
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   109.79403291
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2AsSe
_chemical_formula_sum   'Mg2 As1 Se1'
_cell_volume   84.55565568
_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
  As  As0  1  0.00000000  0.00000000  0.00000000  1
  Mg  Mg1  1  2.01073297  0.00000000  1.88896401  1
  Mg  Mg2  1  2.01073297  0.00000000  5.46109736  1
  Se  Se3  1  0.00000000  0.00000000  3.67503068  1
[/CIF]
