data_Sr2CrTc
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.43
_cell_length_b   3.43
_cell_length_c   8.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2CrTc
_chemical_formula_sum   'Sr2 Cr1 Tc1'
_cell_volume   98.26
_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
  Sr  Sr1  1  0.72  0.72  0.82  1.0
  Sr  Sr2  1  0.0  0.0  0.61  1.0
  Cr  Cr0  1  0.0  0.0  0.47  1.0
  Tc  Tc3  1  0.72  0.72  0.94  1.0

data_Sr2CrTc
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   8.34
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr2CrTc
_chemical_formula_sum   'Sr4 Cr2 Tc2'
_cell_volume   196.53
_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
  Sr  Sr0  2  0.0  0.0  0.61  1.0
  Sr  Sr1  2  0.22  0.5  0.82  1.0
  Cr  Cr2  2  0.0  0.0  0.47  1.0
  Tc  Tc3  2  0.22  0.5  0.94  1.0

Sr Sr Cr Tc
SrCrSrTc is alpha carbon monoxide-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrCr clusters and two SrTc clusters. In each SrCr cluster, Sr(2) is bonded in a single-bond geometry to one Cr(1) atom. The Sr(2)-Cr(1) bond length is 1.10 Å. Cr(1) is bonded in a single-bond geometry to one Sr(2) atom. In each SrTc cluster, Sr(1) is bonded in a single-bond geometry to one Tc(1) atom. The Sr(1)-Tc(1) bond length is 0.97 Å. Tc(1) is bonded in a single-bond geometry to one Sr(1) atom.