The compound described by Sm(AlGe)2 crystallizes in the trigonal P-3m1 space group. Sm(1) is bonded to six equivalent Ge(1) atoms to form SmGe6 octahedra that share corners with twelve equivalent Al(1)Ge4 tetrahedra, edges with six equivalent Sm(1)Ge6 octahedra, and edges with six equivalent Al(1)Ge4 tetrahedra. Al(1) is bonded to four equivalent Ge(1) atoms to form distorted AlGe4 tetrahedra that share corners with six equivalent Sm(1)Ge6 octahedra, corners with six equivalent Al(1)Ge4 tetrahedra, edges with three equivalent Sm(1)Ge6 octahedra, and edges with three equivalent Al(1)Ge4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-54°. Ge(1) is bonded to three equivalent Sm(1) and four equivalent Al(1) atoms to form a mixture of distorted edge and corner-sharing GeSm3Al4 pentagonal bipyramids. is represented by the CIF card [CIF]
data_Sm(AlGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.244
_cell_length_b   4.244
_cell_length_c   6.813
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   106.284
_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  1.000  1.000  0.000  1.0
  Al  Al1  1  0.667  0.333  0.359  1.0
  Al  Al2  1  0.333  0.667  0.641  1.0
  Ge  Ge3  1  0.667  0.333  0.735  1.0
  Ge  Ge4  1  0.333  0.667  0.265  1.0
[/CIF]
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The compound described by Sm(AlGe)2 crystallizes in the trigonal P-3m1 space group. Sm(1) is bonded to six equivalent Ge(1) atoms to form SmGe6 octahedra that share corners with twelve equivalent Al(1)Ge4 tetrahedra, edges with six equivalent Sm(1)Ge6 octahedra, and edges with six equivalent Al(1)Ge4 tetrahedra. Al(1) is bonded to four equivalent Ge(1) atoms to form distorted AlGe4 tetrahedra that share corners with six equivalent Sm(1)Ge6 octahedra, corners with six equivalent Al(1)Ge4 tetrahedra, edges with three equivalent Sm(1)Ge6 octahedra, and edges with three equivalent Al(1)Ge4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-54°. Ge(1) is bonded to three equivalent Sm(1) and four equivalent Al(1) atoms to form a mixture of distorted edge and corner-sharing GeSm3Al4 pentagonal bipyramids. is represented by the CIF card [CIF]
data_Sm(AlGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.244
_cell_length_b   4.244
_cell_length_c   6.813
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   106.284
_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  1.000  1.000  0.000  1.0
  Al  Al1  1  0.667  0.333  0.359  1.0
  Al  Al2  1  0.333  0.667  0.641  1.0
  Ge  Ge3  1  0.667  0.333  0.735  1.0
  Ge  Ge4  1  0.333  0.667  0.265  1.0
[/CIF]
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