[CIF]
data_MgCuSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.08203355
_cell_length_b   7.08203355
_cell_length_c   3.64747401
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   120.00000000
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgCuSe
_chemical_formula_sum   'Mg3 Cu3 Se3'
_cell_volume   158.43050188
_cell_formula_units_Z   3
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
  Cu  Cu0  1  0.00000000  4.08881398  1.82373700  1
  Cu  Cu1  1  3.54101678  2.04440699  1.82373700  1
  Cu  Cu2  1  0.00000000  0.00000000  0.00000000  1
  Mg  Mg3  1  1.91714685  0.00000000  1.82373700  1
  Mg  Mg4  1  -0.95857343  1.66029788  1.82373700  1
  Mg  Mg5  1  2.58244335  4.47292309  1.82373700  1
  Se  Se6  1  4.33876622  0.00000000  0.00000000  1
  Se  Se7  1  -2.16938311  3.75748176  0.00000000  1
  Se  Se8  1  1.37163367  2.37573921  0.00000000  1
[/CIF]
