data_BeCo2Tc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.67
_cell_length_b   2.67
_cell_length_c   6.11
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BeCo2Tc
_chemical_formula_sum   'Be1 Co2 Tc1'
_cell_volume   43.47
_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  0.0  0.0  0.76  1.0
  Co  Co1  1  0.33  0.33  0.96  1.0
  Co  Co2  1  0.0  0.0  0.41  1.0
  Tc  Tc3  1  0.33  0.33  0.15  1.0

data_BeCo2Tc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.77
_cell_length_b   3.77
_cell_length_c   6.11
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BeCo2Tc
_chemical_formula_sum   'Be2 Co4 Tc2'
_cell_volume   86.94
_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  0.76  1.0
  Co  Co1  2  0.0  0.0  0.41  1.0
  Co  Co2  2  0.33  0.0  0.96  1.0
  Tc  Tc3  2  0.33  0.0  0.15  1.0

Be Co Co Tc
BeTcCo2 crystallizes in the monoclinic Cm space group. Be(1) is bonded in a 4-coordinate geometry to one Co(2) and three equivalent Co(1) atoms. The Be(1)-Co(2) bond length is 2.15 Å. There is one shorter (1.73 Å) and two longer (2.32 Å) Be(1)-Co(1) bond lengths. Tc(1) is bonded in a distorted single-bond geometry to one Co(1) and one Co(2) atom. The Tc(1)-Co(1) bond length is 1.15 Å. The Tc(1)-Co(2) bond length is 2.05 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 2-coordinate geometry to three equivalent Be(1) and one Tc(1) atom. In the second Co site, Co(2) is bonded in a 2-coordinate geometry to one Be(1) and one Tc(1) atom.