The crystal structure described by Sm(MnAl2)4 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded to eight equivalent Mn(1), four equivalent Al(2), and eight equivalent Al(1) atoms to form distorted SmMn8Al12 cuboctahedra that share corners with eight equivalent Sm(1)Mn8Al12 cuboctahedra, faces with two equivalent Sm(1)Mn8Al12 cuboctahedra, and faces with sixteen equivalent Mn(1)Sm2Mn2Al8 cuboctahedra. Mn(1) is bonded to two equivalent Sm(1), two equivalent Mn(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted MnSm2Mn2Al8 cuboctahedra that share corners with ten equivalent Mn(1)Sm2Mn2Al8 cuboctahedra, edges with four equivalent Mn(1)Sm2Mn2Al8 cuboctahedra, faces with four equivalent Sm(1)Mn8Al12 cuboctahedra, and faces with six equivalent Mn(1)Sm2Mn2Al8 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Sm(1), four equivalent Mn(1), two equivalent Al(1), and four equivalent Al(2) atoms. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to one Sm(1), four equivalent Mn(1), one Al(2), and four equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Sm(MnAl2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.719
_cell_length_b   6.719
_cell_length_c   6.719
_cell_angle_alpha   97.806
_cell_angle_beta   97.806
_cell_angle_gamma   136.750
_symmetry_Int_Tables_number   1
_cell_volume   193.185
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.500  1.0
  Mn  Mn2  1  0.000  0.000  0.500  1.0
  Mn  Mn3  1  0.000  0.500  0.000  1.0
  Mn  Mn4  1  0.500  0.000  0.000  1.0
  Al  Al5  1  0.280  0.500  0.780  1.0
  Al  Al6  1  0.720  0.500  0.220  1.0
  Al  Al7  1  0.500  0.720  0.220  1.0
  Al  Al8  1  0.500  0.280  0.780  1.0
  Al  Al9  1  0.657  0.000  0.657  1.0
  Al  Al10  1  0.343  0.000  0.343  1.0
  Al  Al11  1  0.000  0.343  0.343  1.0
  Al  Al12  1  0.000  0.657  0.657  1.0
[/CIF]
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The crystal structure described by Sm(MnAl2)4 crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded to eight equivalent Mn(1), four equivalent Al(2), and eight equivalent Al(1) atoms to form distorted SmMn8Al12 cuboctahedra that share corners with eight equivalent Sm(1)Mn8Al12 cuboctahedra, faces with two equivalent Sm(1)Mn8Al12 cuboctahedra, and faces with sixteen equivalent Mn(1)Sm2Mn2Al8 cuboctahedra. Mn(1) is bonded to two equivalent Sm(1), two equivalent Mn(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted MnSm2Mn2Al8 cuboctahedra that share corners with ten equivalent Mn(1)Sm2Mn2Al8 cuboctahedra, edges with four equivalent Mn(1)Sm2Mn2Al8 cuboctahedra, faces with four equivalent Sm(1)Mn8Al12 cuboctahedra, and faces with six equivalent Mn(1)Sm2Mn2Al8 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 12-coordinate geometry to two equivalent Sm(1), four equivalent Mn(1), two equivalent Al(1), and four equivalent Al(2) atoms. In the second Al site, Al(2) is bonded in a 10-coordinate geometry to one Sm(1), four equivalent Mn(1), one Al(2), and four equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_Sm(MnAl2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.719
_cell_length_b   6.719
_cell_length_c   6.719
_cell_angle_alpha   97.806
_cell_angle_beta   97.806
_cell_angle_gamma   136.750
_symmetry_Int_Tables_number   1
_cell_volume   193.185
_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
  Sm  Sm0  1  0.000  0.000  0.000  1.0
  Mn  Mn1  1  0.500  0.500  0.500  1.0
  Mn  Mn2  1  0.000  0.000  0.500  1.0
  Mn  Mn3  1  0.000  0.500  0.000  1.0
  Mn  Mn4  1  0.500  0.000  0.000  1.0
  Al  Al5  1  0.280  0.500  0.780  1.0
  Al  Al6  1  0.720  0.500  0.220  1.0
  Al  Al7  1  0.500  0.720  0.220  1.0
  Al  Al8  1  0.500  0.280  0.780  1.0
  Al  Al9  1  0.657  0.000  0.657  1.0
  Al  Al10  1  0.343  0.000  0.343  1.0
  Al  Al11  1  0.000  0.343  0.343  1.0
  Al  Al12  1  0.000  0.657  0.657  1.0
[/CIF]
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