The structure described by SiGe is Wurtzite structured and crystallizes in the hexagonal P6_3mc space group. Ge(1) is bonded to four equivalent Si(1) atoms to form corner-sharing GeSi4 tetrahedra. Si(1) is bonded to four equivalent Ge(1) atoms to form corner-sharing SiGe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SiGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.904
_cell_length_b   3.904
_cell_length_c   6.451
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   85.165
_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
  Si  Si0  1  0.000  0.000  0.375  1.0
  Si  Si1  1  0.333  0.667  0.875  1.0
  Ge  Ge2  1  0.000  0.000  0.000  1.0
  Ge  Ge3  1  0.333  0.667  0.500  1.0
[/CIF]
.
The structure described by SiGe is Wurtzite structured and crystallizes in the hexagonal P6_3mc space group. Ge(1) is bonded to four equivalent Si(1) atoms to form corner-sharing GeSi4 tetrahedra. Si(1) is bonded to four equivalent Ge(1) atoms to form corner-sharing SiGe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_SiGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.904
_cell_length_b   3.904
_cell_length_c   6.451
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   85.165
_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
  Si  Si0  1  0.000  0.000  0.375  1.0
  Si  Si1  1  0.333  0.667  0.875  1.0
  Ge  Ge2  1  0.000  0.000  0.000  1.0
  Ge  Ge3  1  0.333  0.667  0.500  1.0
[/CIF]
.