data_NaSrTc2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.12
_cell_length_b   11.12
_cell_length_c   11.12
_cell_angle_alpha   14.79
_cell_angle_beta   14.79
_cell_angle_gamma   14.79
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSrTc2
_chemical_formula_sum   'Na1 Sr1 Tc2'
_cell_volume   77.92
_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
  Na  Na0  1  0.0  0.0  0.0  1.0
  Sr  Sr1  1  0.0  0.0  0.49  1.0
  Tc  Tc2  1  0.0  0.0  0.68  1.0
  Tc  Tc3  1  0.0  0.0  0.3  1.0

data_NaSrTc2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.96
_cell_length_b   2.86
_cell_length_c   11.12
_cell_angle_alpha   90.0
_cell_angle_beta   98.54
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaSrTc2
_chemical_formula_sum   'Na2 Sr2 Tc4'
_cell_volume   155.84
_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
  Na  Na0  2  0.0  0.0  0.0  1.0
  Sr  Sr1  2  0.0  0.0  0.51  1.0
  Tc  Tc2  2  0.0  0.0  0.32  1.0
  Tc  Tc3  2  0.0  0.0  0.7  1.0

Na Sr Tc Tc
Na Sr Tc Tc 0 0 o + - 0 0 + - o 0 0 + o - 0 3 o o o 1 3 o o o 1 2 o o o 
NaSrTc2 crystallizes in the monoclinic Cm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to six Na(1,1); one Tc(1); and one Tc(2) atom to form a mixture of distorted corner and edge-sharing NaNa6Tc2 hexagonal bipyramids. All Na(1)-Na(1,1) bond lengths are 2.86 Å. The Na(1)-Tc(1) bond length is 3.55 Å. The Na(1)-Tc(2) bond length is 3.33 Å. In the second Na site, Na(1) is bonded to six Na(1,1); one Tc(1); and one Tc(2) atom to form a mixture of distorted corner and edge-sharing NaNa6Tc2 hexagonal bipyramids. Both Na(1)-Na(1) bond lengths are 2.86 Å. The Na(1)-Tc(1) bond length is 3.55 Å. The Na(1)-Tc(2) bond length is 3.33 Å. Sr(1) is bonded in a linear geometry to one Tc(1) and one Tc(2) atom. The Sr(1)-Tc(1) bond length is 2.12 Å. The Sr(1)-Tc(2) bond length is 2.12 Å. There are two inequivalent Tc sites. In the first Tc site, Tc(1) is bonded in a single-bond geometry to one Na(1) and one Sr(1) atom. In the second Tc site, Tc(2) is bonded in a distorted single-bond geometry to one Na(1) and one Sr(1) atom.