data_BeGa2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.68
_cell_length_b   3.68
_cell_length_c   4.87
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeGa2As
_chemical_formula_sum   'Be1 Ga2 As1'
_cell_volume   65.9
_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
  Be  Be1  1  0.0  0.0  0.0  1.0
  Ga  Ga2  1  0.0  0.84  0.43  1.0
  Ga  Ga3  1  0.84  0.0  0.43  1.0
  As  As0  1  0.84  0.84  0.0  1.0

data_BeGa2As
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.2
_cell_length_b   5.2
_cell_length_c   4.87
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeGa2As
_chemical_formula_sum   'Be2 Ga4 As2'
_cell_volume   131.79
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Be  Be0  2  0.0  0.0  0.0  1.0
  Ga  Ga1  4  0.42  0.42  0.43  1.0
  As  As2  2  0.34  0.5  -0.0  1.0

Be Ga Ga As
Be Ga Ga As 0 3 - - o 1 2 - + o 
BeAs(Ga)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two digallane molecules and two BeAs clusters. In each BeAs cluster, Be(1) is bonded in a single-bond geometry to one As(1) atom. The Be(1)-As(1) bond length is 0.83 Å. As(1) is bonded in a single-bond geometry to one Be(1) atom.