data_BeAg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.9
_cell_length_b   4.9
_cell_length_c   3.9
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   146.3
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeAg
_chemical_formula_sum   'Be2 Ag2'
_cell_volume   51.92
_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
  Be  Be2  1  0.42  0.37  0.93  1.0
  Be  Be3  1  0.42  0.63  0.98  1.0
  Ag  Ag0  1  0.42  0.77  0.93  1.0
  Ag  Ag1  1  0.42  0.23  0.98  1.0

data_BeAg
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.84
_cell_length_b   3.9
_cell_length_c   4.9
_cell_angle_alpha   90.0
_cell_angle_beta   106.85
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   BeAg
_chemical_formula_sum   'Be2 Ag2'
_cell_volume   51.92
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  Be0  2  0.37  0.02  0.87  1.0
  Ag  Ag1  2  0.23  0.98  0.73  1.0

Be Be Ag Ag
Be Be Ag Ag 0 3 o o o 1 2 o o o 
BeAg crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two BeAg clusters. Be(1) is bonded in a distorted single-bond geometry to one Ag(1) atom. The Be(1)-Ag(1) bond length is 0.71 Å. Ag(1) is bonded in a single-bond geometry to one Be(1) atom.