The compound described by SrAl2 crystallizes in the tetragonal P4/nmm space group. Sr(1) is bonded in a 9-coordinate geometry to four equivalent Al(1) and five equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 8-coordinate geometry to four equivalent Sr(1) and four equivalent Al(2) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to five equivalent Sr(1) and four equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_SrAl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.465
_cell_length_b   4.465
_cell_length_c   7.901
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   157.557
_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
  Sr  Sr0  1  0.500  0.000  0.326  1.0
  Sr  Sr1  1  0.000  0.500  0.674  1.0
  Al  Al2  1  0.000  0.000  0.000  1.0
  Al  Al3  1  0.500  0.500  0.000  1.0
  Al  Al4  1  0.000  0.500  0.202  1.0
  Al  Al5  1  0.500  0.000  0.798  1.0
[/CIF]
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The compound described by SrAl2 crystallizes in the tetragonal P4/nmm space group. Sr(1) is bonded in a 9-coordinate geometry to four equivalent Al(1) and five equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 8-coordinate geometry to four equivalent Sr(1) and four equivalent Al(2) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to five equivalent Sr(1) and four equivalent Al(1) atoms. is represented by the CIF file [CIF]
data_SrAl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.465
_cell_length_b   4.465
_cell_length_c   7.901
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   157.557
_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
  Sr  Sr0  1  0.500  0.000  0.326  1.0
  Sr  Sr1  1  0.000  0.500  0.674  1.0
  Al  Al2  1  0.000  0.000  0.000  1.0
  Al  Al3  1  0.500  0.500  0.000  1.0
  Al  Al4  1  0.000  0.500  0.202  1.0
  Al  Al5  1  0.500  0.000  0.798  1.0
[/CIF]
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