The compound described by GaAl4Sb5 is Lavarevi\'{c}ite-like structured and crystallizes in the orthorhombic Imm2 space group. Ga(1) is bonded to two equivalent Sb(1) and two equivalent Sb(2) atoms to form GaSb4 tetrahedra that share corners with two equivalent Ga(1)Sb4 tetrahedra, corners with two equivalent Al(2)Sb4 tetrahedra, and corners with eight equivalent Al(1)Sb4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one Sb(1), one Sb(3), and two equivalent Sb(2) atoms to form AlSb4 tetrahedra that share corners with three equivalent Al(1)Sb4 tetrahedra, corners with four equivalent Ga(1)Sb4 tetrahedra, and corners with five equivalent Al(2)Sb4 tetrahedra. In the second Al site, Al(2) is bonded to one Sb(2) and three equivalent Sb(3) atoms to form AlSb4 tetrahedra that share  a cornercorner with one Ga(1)Sb4 tetrahedra, corners with five equivalent Al(1)Sb4 tetrahedra, and corners with six equivalent Al(2)Sb4 tetrahedra. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Ga(1) and two equivalent Al(1) atoms to form SbAl2Ga2 tetrahedra that share corners with two equivalent Sb(1)Al2Ga2 tetrahedra, corners with two equivalent Sb(3)Al4 tetrahedra, and corners with eight equivalent Sb(2)Al3Ga tetrahedra. In the second Sb site, Sb(2) is bonded to one Ga(1), one Al(2), and two equivalent Al(1) atoms to form SbAl3Ga tetrahedra that share corners with three equivalent Sb(2)Al3Ga tetrahedra, corners with four equivalent Sb(1)Al2Ga2 tetrahedra, and corners with five equivalent Sb(3)Al4 tetrahedra. In the third Sb site, Sb(3) is bonded to one Al(1) and three equivalent Al(2) atoms to form SbAl4 tetrahedra that share  a cornercorner with one Sb(1)Al2Ga2 tetrahedra, corners with five equivalent Sb(2)Al3Ga tetrahedra, and corners with six equivalent Sb(3)Al4 tetrahedra. is represented by the CIF file [CIF]
data_Al4GaSb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.654
_cell_length_b   11.654
_cell_length_c   11.654
_cell_angle_alpha   158.188
_cell_angle_beta   149.020
_cell_angle_gamma   38.209
_symmetry_Int_Tables_number   1
_cell_volume   302.296
_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
  Al  Al0  1  0.400  0.400  1.000  1.0
  Al  Al1  1  0.800  0.800  1.000  1.0
  Al  Al2  1  0.200  0.200  1.000  1.0
  Al  Al3  1  0.600  0.600  1.000  1.0
  Ga  Ga4  1  0.000  0.000  0.000  1.0
  Sb  Sb5  1  0.750  0.500  0.250  1.0
  Sb  Sb6  1  0.150  0.900  0.250  1.0
  Sb  Sb7  1  0.550  0.300  0.250  1.0
  Sb  Sb8  1  0.950  0.700  0.250  1.0
  Sb  Sb9  1  0.350  0.100  0.250  1.0
[/CIF]
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The compound described by GaAl4Sb5 is Lavarevi\'{c}ite-like structured and crystallizes in the orthorhombic Imm2 space group. Ga(1) is bonded to two equivalent Sb(1) and two equivalent Sb(2) atoms to form GaSb4 tetrahedra that share corners with two equivalent Ga(1)Sb4 tetrahedra, corners with two equivalent Al(2)Sb4 tetrahedra, and corners with eight equivalent Al(1)Sb4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one Sb(1), one Sb(3), and two equivalent Sb(2) atoms to form AlSb4 tetrahedra that share corners with three equivalent Al(1)Sb4 tetrahedra, corners with four equivalent Ga(1)Sb4 tetrahedra, and corners with five equivalent Al(2)Sb4 tetrahedra. In the second Al site, Al(2) is bonded to one Sb(2) and three equivalent Sb(3) atoms to form AlSb4 tetrahedra that share  a cornercorner with one Ga(1)Sb4 tetrahedra, corners with five equivalent Al(1)Sb4 tetrahedra, and corners with six equivalent Al(2)Sb4 tetrahedra. There are three inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Ga(1) and two equivalent Al(1) atoms to form SbAl2Ga2 tetrahedra that share corners with two equivalent Sb(1)Al2Ga2 tetrahedra, corners with two equivalent Sb(3)Al4 tetrahedra, and corners with eight equivalent Sb(2)Al3Ga tetrahedra. In the second Sb site, Sb(2) is bonded to one Ga(1), one Al(2), and two equivalent Al(1) atoms to form SbAl3Ga tetrahedra that share corners with three equivalent Sb(2)Al3Ga tetrahedra, corners with four equivalent Sb(1)Al2Ga2 tetrahedra, and corners with five equivalent Sb(3)Al4 tetrahedra. In the third Sb site, Sb(3) is bonded to one Al(1) and three equivalent Al(2) atoms to form SbAl4 tetrahedra that share  a cornercorner with one Sb(1)Al2Ga2 tetrahedra, corners with five equivalent Sb(2)Al3Ga tetrahedra, and corners with six equivalent Sb(3)Al4 tetrahedra. is represented by the CIF file [CIF]
data_Al4GaSb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.654
_cell_length_b   11.654
_cell_length_c   11.654
_cell_angle_alpha   158.188
_cell_angle_beta   149.020
_cell_angle_gamma   38.209
_symmetry_Int_Tables_number   1
_cell_volume   302.296
_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
  Al  Al0  1  0.400  0.400  1.000  1.0
  Al  Al1  1  0.800  0.800  1.000  1.0
  Al  Al2  1  0.200  0.200  1.000  1.0
  Al  Al3  1  0.600  0.600  1.000  1.0
  Ga  Ga4  1  0.000  0.000  0.000  1.0
  Sb  Sb5  1  0.750  0.500  0.250  1.0
  Sb  Sb6  1  0.150  0.900  0.250  1.0
  Sb  Sb7  1  0.550  0.300  0.250  1.0
  Sb  Sb8  1  0.950  0.700  0.250  1.0
  Sb  Sb9  1  0.350  0.100  0.250  1.0
[/CIF]
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