data_KMg2Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.38
_cell_length_b   6.38
_cell_length_c   6.38
_cell_angle_alpha   150.08
_cell_angle_beta   126.24
_cell_angle_gamma   62.75
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KMg2Rh
_chemical_formula_sum   'K1 Mg2 Rh1'
_cell_volume   103.36
_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  0.0  1.0
  Mg  Mg1  1  0.0  0.88  0.01  1.0
  Mg  Mg2  1  0.65  0.0  0.44  1.0
  Rh  Rh3  1  0.0  0.0  0.44  1.0

data_KMg2Rh
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.29
_cell_length_b   5.77
_cell_length_c   6.38
_cell_angle_alpha   116.88
_cell_angle_beta   104.96
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KMg2Rh
_chemical_formula_sum   'K1 Mg2 Rh1'
_cell_volume   103.36
_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  0.0  1.0
  Mg  Mg1  1  0.21  0.56  0.21  1.0
  Mg  Mg2  1  0.99  0.87  0.87  1.0
  Rh  Rh3  1  0.56  0.56  0.56  1.0

K Mg Mg Rh
KMg2Rh crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one KMg2Rh cluster. K(1) is bonded in a single-bond geometry to one Mg(1) atom. The K(1)-Mg(1) bond length is 0.80 Å. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 2-coordinate geometry to one K(1) and one Rh(1) atom. The Mg(1)-Rh(1) bond length is 2.16 Å. In the second Mg site, Mg(2) is bonded in a distorted single-bond geometry to one Rh(1) atom. The Mg(2)-Rh(1) bond length is 2.22 Å. Rh(1) is bonded in a distorted bent 120 degrees geometry to one Mg(1) and one Mg(2) atom.