data_Be2FeTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.69
_cell_length_b   2.69
_cell_length_c   5.61
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Be2FeTc
_chemical_formula_sum   'Be2 Fe1 Tc1'
_cell_volume   40.51
_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  Be0  1  0.34  0.34  0.43  1.0
  Be  Be1  1  0.34  0.34  0.19  1.0
  Fe  Fe2  1  0.0  0.0  0.0  1.0
  Tc  Tc3  1  0.0  0.0  0.81  1.0

data_Be2FeTc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.8
_cell_length_b   3.8
_cell_length_c   5.61
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Be2FeTc
_chemical_formula_sum   'Be4 Fe2 Tc2'
_cell_volume   81.02
_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  0.34  0.0  0.19  1.0
  Be  Be1  2  0.34  0.0  0.43  1.0
  Fe  Fe2  2  0.0  0.0  0.0  1.0
  Tc  Tc3  2  0.0  0.0  0.81  1.0

Be Be Fe Tc
Be2TcFe crystallizes in the monoclinic Cm space group. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a 2-coordinate geometry to one Be(2) and one Tc(1) atom. The Be(1)-Be(2) bond length is 1.36 Å. The Be(1)-Tc(1) bond length is 2.50 Å. In the second Be site, Be(2) is bonded in a 4-coordinate geometry to one Be(1) and three equivalent Fe(1) atoms. There is one shorter (1.67 Å) and two longer (2.25 Å) Be(2)-Fe(1) bond lengths. Tc(1) is bonded in a distorted single-bond geometry to one Be(1) and one Fe(1) atom. The Tc(1)-Fe(1) bond length is 1.08 Å. Fe(1) is bonded in a 2-coordinate geometry to three equivalent Be(2) and one Tc(1) atom.