The compound described by Sr2Ga3Al is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. Sr(1) is bonded to three equivalent Ga(1), three equivalent Ga(2), three equivalent Ga(3), and three equivalent Al(1) atoms to form a mixture of face and edge-sharing SrAl3Ga9 cuboctahedra. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to six equivalent Sr(1) and three equivalent Ga(3) atoms. In the second Ga site, Ga(2) is bonded in a distorted trigonal planar geometry to six equivalent Sr(1) and three equivalent Al(1) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to six equivalent Sr(1) and three equivalent Ga(1) atoms. Al(1) is bonded in a distorted trigonal planar geometry to six equivalent Sr(1) and three equivalent Ga(2) atoms. is represented by the CIF file [CIF]
data_Sr2AlGa3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.339
_cell_length_b   4.339
_cell_length_c   9.669
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   157.638
_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
  Sr  Sr0  1  0.000  0.000  0.752  1.0
  Sr  Sr1  1  0.000  0.000  0.248  1.0
  Al  Al2  1  0.333  0.667  0.500  1.0
  Ga  Ga3  1  0.333  0.667  0.000  1.0
  Ga  Ga4  1  0.667  0.333  0.500  1.0
  Ga  Ga5  1  0.667  0.333  0.000  1.0
[/CIF]
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The compound described by Sr2Ga3Al is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. Sr(1) is bonded to three equivalent Ga(1), three equivalent Ga(2), three equivalent Ga(3), and three equivalent Al(1) atoms to form a mixture of face and edge-sharing SrAl3Ga9 cuboctahedra. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to six equivalent Sr(1) and three equivalent Ga(3) atoms. In the second Ga site, Ga(2) is bonded in a distorted trigonal planar geometry to six equivalent Sr(1) and three equivalent Al(1) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to six equivalent Sr(1) and three equivalent Ga(1) atoms. Al(1) is bonded in a distorted trigonal planar geometry to six equivalent Sr(1) and three equivalent Ga(2) atoms. is represented by the CIF file [CIF]
data_Sr2AlGa3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.339
_cell_length_b   4.339
_cell_length_c   9.669
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   157.638
_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
  Sr  Sr0  1  0.000  0.000  0.752  1.0
  Sr  Sr1  1  0.000  0.000  0.248  1.0
  Al  Al2  1  0.333  0.667  0.500  1.0
  Ga  Ga3  1  0.333  0.667  0.000  1.0
  Ga  Ga4  1  0.667  0.333  0.500  1.0
  Ga  Ga5  1  0.667  0.333  0.000  1.0
[/CIF]
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