The structure described by Sr3(AlGe)2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to two equivalent Al(1) and five equivalent Ge(1) atoms. In the second Sr site, Sr(2) is bonded to eight equivalent Al(1) and four equivalent Ge(1) atoms to form a mixture of face and edge-sharing SrAl8Ge4 cuboctahedra. Al(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), four equivalent Sr(2), one Al(1), and two equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sr(2), five equivalent Sr(1), and two equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_Sr3(AlGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.232
_cell_length_b   4.866
_cell_length_c   10.152
_cell_angle_alpha   103.875
_cell_angle_beta   102.029
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   198.205
_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  0.815  0.815  0.631  1.0
  Sr  Sr1  1  0.500  0.000  0.000  1.0
  Sr  Sr2  1  0.185  0.185  0.369  1.0
  Al  Al3  1  0.933  0.433  0.867  1.0
  Al  Al4  1  0.067  0.567  0.133  1.0
  Ge  Ge5  1  0.359  0.360  0.719  1.0
  Ge  Ge6  1  0.641  0.640  0.281  1.0
[/CIF]
.
The structure described by Sr3(AlGe)2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to two equivalent Al(1) and five equivalent Ge(1) atoms. In the second Sr site, Sr(2) is bonded to eight equivalent Al(1) and four equivalent Ge(1) atoms to form a mixture of face and edge-sharing SrAl8Ge4 cuboctahedra. Al(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), four equivalent Sr(2), one Al(1), and two equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Sr(2), five equivalent Sr(1), and two equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_Sr3(AlGe)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.232
_cell_length_b   4.866
_cell_length_c   10.152
_cell_angle_alpha   103.875
_cell_angle_beta   102.029
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   198.205
_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  0.815  0.815  0.631  1.0
  Sr  Sr1  1  0.500  0.000  0.000  1.0
  Sr  Sr2  1  0.185  0.185  0.369  1.0
  Al  Al3  1  0.933  0.433  0.867  1.0
  Al  Al4  1  0.067  0.567  0.133  1.0
  Ge  Ge5  1  0.359  0.360  0.719  1.0
  Ge  Ge6  1  0.641  0.640  0.281  1.0
[/CIF]
.