data_K2Mn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.14
_cell_length_b   9.14
_cell_length_c   9.14
_cell_angle_alpha   154.69
_cell_angle_beta   154.69
_cell_angle_gamma   36.1
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2Mn
_chemical_formula_sum   'K2 Mn1'
_cell_volume   139.38
_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
  K  K0  1  0.0  0.0  0.1  1.0
  K  K1  1  0.0  0.0  0.29  1.0
  Mn  Mn2  1  0.0  0.0  0.0  1.0

data_K2Mn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.66
_cell_length_b   5.66
_cell_length_c   9.14
_cell_angle_alpha   90.0
_cell_angle_beta   108.05
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2Mn
_chemical_formula_sum   'K4 Mn2'
_cell_volume   278.77
_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
  K  K0  2  0.1  0.0  0.1  1.0
  K  K1  2  0.29  0.0  0.29  1.0
  Mn  Mn2  2  0.0  0.0  0.0  1.0

K K Mn
K2Mn crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two K2Mn clusters. There are two inequivalent K sites. In the first K site, K(1) is bonded in a single-bond geometry to one K(2) and one Mn(1) atom. The K(1)-K(2) bond length is 1.74 Å. The K(1)-Mn(1) bond length is 0.87 Å. In the second K site, K(2) is bonded in a single-bond geometry to one K(1) atom. Mn(1) is bonded in a single-bond geometry to one K(1) atom.