The compound described by SmAu4Al8Si crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Au(1), eight equivalent Al(1), and four equivalent Si(1) atoms. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Al(1), and one Si(1) atom. In the second Au site, Au(2,4) is bonded in a body-centered cubic geometry to eight equivalent Al(2) atoms. In the third Au site, Au(3) is bonded in a body-centered cubic geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent Sm(1), one Au(1), two equivalent Au(3), and one Si(1) atom to form distorted AlSm2SiAu3 tetrahedra that share corners with six equivalent Al(2)Au4 tetrahedra, corners with eight equivalent Al(1)Sm2SiAu3 tetrahedra,  an edgeedge with one Al(2)Au4 tetrahedra, edges with three equivalent Al(1)Sm2SiAu3 tetrahedra, and faces with four equivalent Al(1)Sm2SiAu3 tetrahedra. In the second Al site, Al(2) is bonded to two equivalent Au(2,4) and two equivalent Au(3) atoms to form AlAu4 tetrahedra that share corners with six equivalent Al(1)Sm2SiAu3 tetrahedra, corners with ten equivalent Al(2)Au4 tetrahedra,  an edgeedge with one Al(1)Sm2SiAu3 tetrahedra, and edges with five equivalent Al(2)Au4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Au(1), and four equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmAl8SiAu4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.904
_cell_length_b   14.904
_cell_length_c   14.904
_cell_angle_alpha   156.785
_cell_angle_beta   156.785
_cell_angle_gamma   33.064
_symmetry_Int_Tables_number   1
_cell_volume   513.932
_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  0.750  0.250  0.500  1.0
  Sm  Sm1  1  0.250  0.750  0.500  1.0
  Al  Al2  1  0.407  0.407  0.501  1.0
  Al  Al3  1  0.593  0.593  0.499  1.0
  Al  Al4  1  0.906  0.906  0.499  1.0
  Al  Al5  1  0.407  0.906  0.000  1.0
  Al  Al6  1  0.094  0.593  0.000  1.0
  Al  Al7  1  0.094  0.094  0.501  1.0
  Al  Al8  1  0.593  0.094  0.000  1.0
  Al  Al9  1  0.906  0.407  0.000  1.0
  Al  Al10  1  0.303  0.303  0.500  1.0
  Al  Al11  1  0.697  0.697  0.500  1.0
  Al  Al12  1  0.802  0.802  0.500  1.0
  Al  Al13  1  0.303  0.802  0.000  1.0
  Al  Al14  1  0.198  0.697  0.000  1.0
  Al  Al15  1  0.198  0.198  0.500  1.0
  Al  Al16  1  0.697  0.198  0.000  1.0
  Al  Al17  1  0.802  0.303  0.000  1.0
  Si  Si18  1  0.292  0.292  0.000  1.0
  Si  Si19  1  0.708  0.708  0.000  1.0
  Au  Au20  1  0.207  0.207  0.000  1.0
  Au  Au21  1  0.793  0.793  0.000  1.0
  Au  Au22  1  0.000  0.000  0.000  1.0
  Au  Au23  1  0.605  0.105  0.500  1.0
  Au  Au24  1  0.395  0.895  0.500  1.0
  Au  Au25  1  0.105  0.605  0.500  1.0
  Au  Au26  1  0.895  0.395  0.500  1.0
  Au  Au27  1  0.500  0.500  0.000  1.0
[/CIF]
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The compound described by SmAu4Al8Si crystallizes in the tetragonal I4/mmm space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Au(1), eight equivalent Al(1), and four equivalent Si(1) atoms. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), four equivalent Al(1), and one Si(1) atom. In the second Au site, Au(2,4) is bonded in a body-centered cubic geometry to eight equivalent Al(2) atoms. In the third Au site, Au(3) is bonded in a body-centered cubic geometry to four equivalent Al(1) and four equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to two equivalent Sm(1), one Au(1), two equivalent Au(3), and one Si(1) atom to form distorted AlSm2SiAu3 tetrahedra that share corners with six equivalent Al(2)Au4 tetrahedra, corners with eight equivalent Al(1)Sm2SiAu3 tetrahedra,  an edgeedge with one Al(2)Au4 tetrahedra, edges with three equivalent Al(1)Sm2SiAu3 tetrahedra, and faces with four equivalent Al(1)Sm2SiAu3 tetrahedra. In the second Al site, Al(2) is bonded to two equivalent Au(2,4) and two equivalent Au(3) atoms to form AlAu4 tetrahedra that share corners with six equivalent Al(1)Sm2SiAu3 tetrahedra, corners with ten equivalent Al(2)Au4 tetrahedra,  an edgeedge with one Al(1)Sm2SiAu3 tetrahedra, and edges with five equivalent Al(2)Au4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Au(1), and four equivalent Al(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_SmAl8SiAu4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.904
_cell_length_b   14.904
_cell_length_c   14.904
_cell_angle_alpha   156.785
_cell_angle_beta   156.785
_cell_angle_gamma   33.064
_symmetry_Int_Tables_number   1
_cell_volume   513.932
_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  0.750  0.250  0.500  1.0
  Sm  Sm1  1  0.250  0.750  0.500  1.0
  Al  Al2  1  0.407  0.407  0.501  1.0
  Al  Al3  1  0.593  0.593  0.499  1.0
  Al  Al4  1  0.906  0.906  0.499  1.0
  Al  Al5  1  0.407  0.906  0.000  1.0
  Al  Al6  1  0.094  0.593  0.000  1.0
  Al  Al7  1  0.094  0.094  0.501  1.0
  Al  Al8  1  0.593  0.094  0.000  1.0
  Al  Al9  1  0.906  0.407  0.000  1.0
  Al  Al10  1  0.303  0.303  0.500  1.0
  Al  Al11  1  0.697  0.697  0.500  1.0
  Al  Al12  1  0.802  0.802  0.500  1.0
  Al  Al13  1  0.303  0.802  0.000  1.0
  Al  Al14  1  0.198  0.697  0.000  1.0
  Al  Al15  1  0.198  0.198  0.500  1.0
  Al  Al16  1  0.697  0.198  0.000  1.0
  Al  Al17  1  0.802  0.303  0.000  1.0
  Si  Si18  1  0.292  0.292  0.000  1.0
  Si  Si19  1  0.708  0.708  0.000  1.0
  Au  Au20  1  0.207  0.207  0.000  1.0
  Au  Au21  1  0.793  0.793  0.000  1.0
  Au  Au22  1  0.000  0.000  0.000  1.0
  Au  Au23  1  0.605  0.105  0.500  1.0
  Au  Au24  1  0.395  0.895  0.500  1.0
  Au  Au25  1  0.105  0.605  0.500  1.0
  Au  Au26  1  0.895  0.395  0.500  1.0
  Au  Au27  1  0.500  0.500  0.000  1.0
[/CIF]
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