data_KBeMo2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.82
_cell_length_b   3.82
_cell_length_c   4.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KBeMo2
_chemical_formula_sum   'K1 Be1 Mo2'
_cell_volume   72.04
_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  K1  1  0.91  0.91  0.0  1.0
  Be  Be0  1  0.0  0.0  0.0  1.0
  Mo  Mo2  1  0.91  0.0  0.47  1.0
  Mo  Mo3  1  0.0  0.91  0.47  1.0

data_KBeMo2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.4
_cell_length_b   5.4
_cell_length_c   4.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   KBeMo2
_chemical_formula_sum   'K2 Be2 Mo4'
_cell_volume   144.09
_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  0.41  0.5  -0.0  1.0
  Be  Be1  2  0.0  0.0  0.0  1.0
  Mo  Mo2  4  0.46  0.46  0.47  1.0

K Be Mo Mo
Be(K)(Mo)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two molybdenum dimer molecules and two Be(K) clusters. In each Be(K) cluster, K(1) is bonded in a single-bond geometry to one Be(1) atom. The K(1)-Be(1) bond length is 0.48 Å. Be(1) is bonded in a single-bond geometry to one K(1) atom.