data_BaMn2Co
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.27
_cell_length_b   5.27
_cell_length_c   5.27
_cell_angle_alpha   131.46
_cell_angle_beta   131.46
_cell_angle_gamma   71.09
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BaMn2Co
_chemical_formula_sum   'Ba1 Mn2 Co1'
_cell_volume   80.45
_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
  Ba  Ba0  1  0.0  0.0  0.29  1.0
  Mn  Mn2  1  0.17  0.0  0.14  1.0
  Mn  Mn3  1  0.0  0.17  0.14  1.0
  Co  Co1  1  0.0  0.0  0.0  1.0

data_BaMn2Co
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.13
_cell_length_b   6.13
_cell_length_c   5.27
_cell_angle_alpha   90.0
_cell_angle_beta   125.55
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BaMn2Co
_chemical_formula_sum   'Ba2 Mn4 Co2'
_cell_volume   160.9
_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
  Ba  Ba0  2  0.0  0.0  0.29  1.0
  Mn  Mn1  4  0.42  0.42  0.98  1.0
  Co  Co2  2  0.0  0.0  0.0  1.0

Ba Mn Mn Co
BaMn2Co crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two BaMn2Co clusters. Ba(1) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one Co(1) atom. Both Ba(1)-Mn(1) bond lengths are 1.49 Å. The Ba(1)-Co(1) bond length is 1.51 Å. Mn(1) is bonded in a distorted single-bond geometry to one Ba(1) and one Co(1) atom. The Mn(1)-Co(1) bond length is 0.68 Å. Co(1) is bonded in a water-like geometry to one Ba(1) and two equivalent Mn(1) atoms.