The structure described by Al3Sm crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Al(1) atoms to form a mixture of distorted corner and face-sharing SmAl12 cuboctahedra. Al(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1) and six equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_SmAl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.411
_cell_length_b   6.411
_cell_length_c   4.593
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   163.486
_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
  Al  Al2  1  0.858  0.142  0.750  1.0
  Al  Al3  1  0.142  0.283  0.250  1.0
  Al  Al4  1  0.717  0.858  0.250  1.0
  Al  Al5  1  0.142  0.858  0.250  1.0
  Al  Al6  1  0.858  0.717  0.750  1.0
  Al  Al7  1  0.283  0.142  0.750  1.0
[/CIF]
.
The structure described by Al3Sm crystallizes in the hexagonal P6_3/mmc space group. Sm(1) is bonded to twelve equivalent Al(1) atoms to form a mixture of distorted corner and face-sharing SmAl12 cuboctahedra. Al(1) is bonded in a 10-coordinate geometry to four equivalent Sm(1) and six equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_SmAl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.411
_cell_length_b   6.411
_cell_length_c   4.593
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   163.486
_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
  Al  Al2  1  0.858  0.142  0.750  1.0
  Al  Al3  1  0.142  0.283  0.250  1.0
  Al  Al4  1  0.717  0.858  0.250  1.0
  Al  Al5  1  0.142  0.858  0.250  1.0
  Al  Al6  1  0.858  0.717  0.750  1.0
  Al  Al7  1  0.283  0.142  0.750  1.0
[/CIF]
.