data_Mn2CdSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   5.01
_cell_angle_alpha   130.72
_cell_angle_beta   130.72
_cell_angle_gamma   72.26
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mn2CdSe
_chemical_formula_sum   'Mn2 Cd1 Se1'
_cell_volume   70.66
_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
  Mn  Mn1  1  0.0  0.09  0.02  1.0
  Mn  Mn2  1  0.09  0.0  0.02  1.0
  Cd  Cd0  1  0.0  0.0  0.05  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0

data_Mn2CdSe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.91
_cell_length_b   5.91
_cell_length_c   5.01
_cell_angle_alpha   90.0
_cell_angle_beta   126.13
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mn2CdSe
_chemical_formula_sum   'Mn4 Cd2 Se2'
_cell_volume   141.32
_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
  Mn  Mn0  4  0.46  0.46  0.93  1.0
  Cd  Cd1  2  0.0  0.0  0.05  1.0
  Se  Se2  2  0.0  0.0  0.0  1.0

Mn Mn Cd Se
Mn2CdSe is Ammonia-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Mn2CdSe clusters. Mn(1) is bonded in a single-bond geometry to one Se(1) atom. The Mn(1)-Se(1) bond length is 0.38 Å. Cd(1) is bonded in a single-bond geometry to one Se(1) atom. The Cd(1)-Se(1) bond length is 0.24 Å. Se(1) is bonded in a trigonal non-coplanar geometry to two equivalent Mn(1) and one Cd(1) atom.