The material structure described by SmMn3 crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Mn(1) atoms to form a mixture of face and corner-sharing SmMn12 cuboctahedra. Mn(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1) and six equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_SmMn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.023
_cell_length_b   6.023
_cell_length_c   4.629
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   145.418
_cell_formula_units_Z   2
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  0.667  0.333  0.250  1.0
  Sm  Sm1  1  0.333  0.667  0.750  1.0
  Mn  Mn2  1  0.853  0.147  0.750  1.0
  Mn  Mn3  1  0.293  0.147  0.750  1.0
  Mn  Mn4  1  0.853  0.707  0.750  1.0
  Mn  Mn5  1  0.147  0.853  0.250  1.0
  Mn  Mn6  1  0.707  0.853  0.250  1.0
  Mn  Mn7  1  0.147  0.293  0.250  1.0
[/CIF]
.
The material structure described by SmMn3 crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Mn(1) atoms to form a mixture of face and corner-sharing SmMn12 cuboctahedra. Mn(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1) and six equivalent Mn(1) atoms. is represented by the CIF file [CIF]
data_SmMn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.023
_cell_length_b   6.023
_cell_length_c   4.629
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   145.418
_cell_formula_units_Z   2
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  0.667  0.333  0.250  1.0
  Sm  Sm1  1  0.333  0.667  0.750  1.0
  Mn  Mn2  1  0.853  0.147  0.750  1.0
  Mn  Mn3  1  0.293  0.147  0.750  1.0
  Mn  Mn4  1  0.853  0.707  0.750  1.0
  Mn  Mn5  1  0.147  0.853  0.250  1.0
  Mn  Mn6  1  0.707  0.853  0.250  1.0
  Mn  Mn7  1  0.147  0.293  0.250  1.0
[/CIF]
.