data_Co2SnGe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.1
_cell_length_b   4.1
_cell_length_c   5.28
_cell_angle_alpha   102.27
_cell_angle_beta   102.27
_cell_angle_gamma   43.07
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Co2SnGe
_chemical_formula_sum   'Co2 Sn1 Ge1'
_cell_volume   59.08
_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
  Co  Co0  1  0.43  0.0  0.11  1.0
  Co  Co1  1  1.0  0.0  0.03  1.0
  Sn  Sn3  1  0.21  0.0  0.57  1.0
  Ge  Ge2  1  0.0  0.0  0.0  1.0

data_Co2SnGe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.01
_cell_length_b   4.1
_cell_length_c   5.28
_cell_angle_alpha   102.27
_cell_angle_beta   90.0
_cell_angle_gamma   111.54
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Co2SnGe
_chemical_formula_sum   'Co2 Sn1 Ge1'
_cell_volume   59.08
_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
  Co  Co0  1  0.0  0.0  0.97  1.0
  Co  Co1  1  0.0  0.57  0.89  1.0
  Sn  Sn2  1  0.0  0.79  0.43  1.0
  Ge  Ge3  1  0.0  0.0  0.0  1.0

Co Co Sn Ge
Co2SnGe crystallizes in the triclinic P1 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 5-coordinate geometry to two equivalent Co(2), two equivalent Sn(1), and one Ge(1) atom. There is one shorter (1.72 Å) and one longer (2.49 Å) Co(1)-Co(2) bond length. There is one shorter (2.74 Å) and one longer (2.81 Å) Co(1)-Sn(1) bond length. The Co(1)-Ge(1) bond length is 1.73 Å. In the second Co site, Co(2) is bonded in a single-bond geometry to two equivalent Co(1), one Sn(1), and one Ge(1) atom. The Co(2)-Sn(1) bond length is 2.81 Å. The Co(2)-Ge(1) bond length is 0.14 Å. Sn(1) is bonded to one Co(2), two equivalent Co(1), two equivalent Sn(1), and one Ge(1) atom to form corner-sharing SnCo3Sn2Ge octahedra. The corner-sharing octahedral tilt angles range from 0-36°. Both Sn(1)-Sn(1) bond lengths are 3.01 Å. The Sn(1)-Ge(1) bond length is 2.60 Å. Ge(1) is bonded in a single-bond geometry to one Co(1), one Co(2), and one Sn(1) atom.