data_GeTe2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.31
_cell_length_b   4.31
_cell_length_c   5.06
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   GeTe2Se
_chemical_formula_sum   'Ge1 Te2 Se1'
_cell_volume   94.0
_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
  Ge  Ge0  1  0.0  0.0  0.0  1.0
  Te  Te2  1  0.15  0.0  0.53  1.0
  Te  Te3  1  0.0  0.15  0.53  1.0
  Se  Se1  1  0.15  0.15  0.0  1.0

data_GeTe2Se
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.09
_cell_length_b   6.09
_cell_length_c   5.06
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   GeTe2Se
_chemical_formula_sum   'Ge2 Te4 Se2'
_cell_volume   187.99
_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
  Ge  Ge0  2  0.0  0.0  0.0  1.0
  Te  Te1  4  0.08  0.08  0.53  1.0
  Se  Se2  2  0.15  0.0  0.0  1.0

Ge Te Te Se
Ge Te Te Se 0 3 o o o 1 2 o o o 
Ge1Se1Te2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two germanium(ii) selenide molecules and two tellurium, mol. (te2) molecules.