data_MgSnRh2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.46
_cell_length_b   3.46
_cell_length_c   5.64
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgSnRh2
_chemical_formula_sum   'Mg1 Sn1 Rh2'
_cell_volume   67.71
_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
  Mg  Mg0  1  0.0  0.0  0.45  1.0
  Sn  Sn3  1  0.73  0.73  0.67  1.0
  Rh  Rh1  1  0.73  0.73  0.46  1.0
  Rh  Rh2  1  0.0  0.0  0.54  1.0

data_MgSnRh2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.9
_cell_length_b   4.9
_cell_length_c   5.64
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgSnRh2
_chemical_formula_sum   'Mg2 Sn2 Rh4'
_cell_volume   135.42
_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
  Mg  Mg0  2  0.0  0.0  0.45  1.0
  Sn  Sn1  2  0.23  0.5  0.67  1.0
  Rh  Rh2  2  0.0  0.0  0.54  1.0
  Rh  Rh3  2  0.23  0.5  0.46  1.0

Mg Sn Rh Rh
Mg Sn Rh Rh 0 3 o o o 0 2 - - o 1 2 o o o 2 3 + + o 
MgRh2Sn is alpha Niobium phosphide-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgRh2Sn clusters. Mg(1) is bonded in a single-bond geometry to one Rh(1) and one Rh(2) atom. The Mg(1)-Rh(1) bond length is 1.31 Å. The Mg(1)-Rh(2) bond length is 0.51 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a distorted L-shaped geometry to one Mg(1) and one Sn(1) atom. The Rh(1)-Sn(1) bond length is 1.18 Å. In the second Rh site, Rh(2) is bonded in a single-bond geometry to one Mg(1) atom. Sn(1) is bonded in a distorted single-bond geometry to one Rh(1) atom.