The structure described by GaAs is SC16 CuCl, stable at 5GPa structured and crystallizes in the cubic Pa-3 space group. Ga(1) is bonded to four equivalent As(1) atoms to form corner-sharing GaAs4 tetrahedra. As(1) is bonded to four equivalent Ga(1) atoms to form corner-sharing AsGa4 trigonal pyramids. is represented by the CIF file [CIF]
data_GaAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.053
_cell_length_b   7.053
_cell_length_c   7.053
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   350.867
_cell_formula_units_Z   8
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
  Ga  Ga0  1  0.342  0.342  0.342  1.0
  Ga  Ga1  1  0.158  0.658  0.842  1.0
  Ga  Ga2  1  0.842  0.158  0.658  1.0
  Ga  Ga3  1  0.658  0.842  0.158  1.0
  Ga  Ga4  1  0.658  0.658  0.658  1.0
  Ga  Ga5  1  0.842  0.342  0.158  1.0
  Ga  Ga6  1  0.158  0.842  0.342  1.0
  Ga  Ga7  1  0.342  0.158  0.842  1.0
  As  As8  1  0.141  0.141  0.141  1.0
  As  As9  1  0.359  0.859  0.641  1.0
  As  As10  1  0.641  0.359  0.859  1.0
  As  As11  1  0.859  0.641  0.359  1.0
  As  As12  1  0.859  0.859  0.859  1.0
  As  As13  1  0.641  0.141  0.359  1.0
  As  As14  1  0.359  0.641  0.141  1.0
  As  As15  1  0.141  0.359  0.641  1.0
[/CIF]
.
The structure described by GaAs is SC16 CuCl, stable at 5GPa structured and crystallizes in the cubic Pa-3 space group. Ga(1) is bonded to four equivalent As(1) atoms to form corner-sharing GaAs4 tetrahedra. As(1) is bonded to four equivalent Ga(1) atoms to form corner-sharing AsGa4 trigonal pyramids. is represented by the CIF file [CIF]
data_GaAs
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.053
_cell_length_b   7.053
_cell_length_c   7.053
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   350.867
_cell_formula_units_Z   8
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
  Ga  Ga0  1  0.342  0.342  0.342  1.0
  Ga  Ga1  1  0.158  0.658  0.842  1.0
  Ga  Ga2  1  0.842  0.158  0.658  1.0
  Ga  Ga3  1  0.658  0.842  0.158  1.0
  Ga  Ga4  1  0.658  0.658  0.658  1.0
  Ga  Ga5  1  0.842  0.342  0.158  1.0
  Ga  Ga6  1  0.158  0.842  0.342  1.0
  Ga  Ga7  1  0.342  0.158  0.842  1.0
  As  As8  1  0.141  0.141  0.141  1.0
  As  As9  1  0.359  0.859  0.641  1.0
  As  As10  1  0.641  0.359  0.859  1.0
  As  As11  1  0.859  0.641  0.359  1.0
  As  As12  1  0.859  0.859  0.859  1.0
  As  As13  1  0.641  0.141  0.359  1.0
  As  As14  1  0.359  0.641  0.141  1.0
  As  As15  1  0.141  0.359  0.641  1.0
[/CIF]
.