The material structure described by BaAl2Si2 crystallizes in the orthorhombic Cmcm space group. Ba(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Al(1) is bonded in a 3-coordinate geometry to three equivalent Si(1) atoms. Si(1) is bonded in a 7-coordinate geometry to three equivalent Ba(1), three equivalent Al(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba(AlSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.846
_cell_length_b   5.846
_cell_length_c   10.222
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   136.279
_symmetry_Int_Tables_number   1
_cell_volume   241.462
_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
  Ba  Ba0  1  0.914  0.086  0.750  1.0
  Ba  Ba1  1  0.086  0.914  0.250  1.0
  Al  Al2  1  0.621  0.379  0.965  1.0
  Al  Al3  1  0.379  0.621  0.465  1.0
  Al  Al4  1  0.379  0.621  0.035  1.0
  Al  Al5  1  0.621  0.379  0.535  1.0
  Si  Si6  1  0.799  0.201  0.368  1.0
  Si  Si7  1  0.201  0.799  0.868  1.0
  Si  Si8  1  0.799  0.201  0.132  1.0
  Si  Si9  1  0.201  0.799  0.632  1.0
[/CIF]
.
The material structure described by BaAl2Si2 crystallizes in the orthorhombic Cmcm space group. Ba(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Al(1) is bonded in a 3-coordinate geometry to three equivalent Si(1) atoms. Si(1) is bonded in a 7-coordinate geometry to three equivalent Ba(1), three equivalent Al(1), and one Si(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba(AlSi)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.846
_cell_length_b   5.846
_cell_length_c   10.222
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   136.279
_symmetry_Int_Tables_number   1
_cell_volume   241.462
_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
  Ba  Ba0  1  0.914  0.086  0.750  1.0
  Ba  Ba1  1  0.086  0.914  0.250  1.0
  Al  Al2  1  0.621  0.379  0.965  1.0
  Al  Al3  1  0.379  0.621  0.465  1.0
  Al  Al4  1  0.379  0.621  0.035  1.0
  Al  Al5  1  0.621  0.379  0.535  1.0
  Si  Si6  1  0.799  0.201  0.368  1.0
  Si  Si7  1  0.201  0.799  0.868  1.0
  Si  Si8  1  0.799  0.201  0.132  1.0
  Si  Si9  1  0.201  0.799  0.632  1.0
[/CIF]
.