data_MgBe2Tc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.86
_cell_length_b   3.86
_cell_length_c   3.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgBe2Tc
_chemical_formula_sum   'Mg1 Be2 Tc1'
_cell_volume   47.91
_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
  Mg  Mg2  1  0.0  0.0  0.0  1.0
  Be  Be0  1  0.93  0.0  0.61  1.0
  Be  Be1  1  0.0  0.93  0.61  1.0
  Tc  Tc3  1  0.93  0.93  0.0  1.0

data_MgBe2Tc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.46
_cell_length_b   5.46
_cell_length_c   3.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgBe2Tc
_chemical_formula_sum   'Mg2 Be4 Tc2'
_cell_volume   95.82
_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
  Mg  Mg0  2  0.0  0.0  0.0  1.0
  Be  Be1  4  0.47  0.47  0.61  1.0
  Tc  Tc2  2  0.43  0.5  -0.0  1.0

Mg Be Be Tc
Mg Be Be Tc 0 3 - - o 1 2 + - o 
(Be)2MgTc crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Be clusters and two MgTc clusters. In each Be cluster, Be(1) is bonded in a single-bond geometry to one Be(1) atom. The Be(1)-Be(1) bond length is 0.37 Å. In each MgTc cluster, Mg(1) is bonded in a single-bond geometry to one Tc(1) atom. The Mg(1)-Tc(1) bond length is 0.37 Å. Tc(1) is bonded in a single-bond geometry to one Mg(1) atom.