The material structure described by Tb12Os5C15 crystallizes in the hexagonal P-62m space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one C(2), one C(3), one C(4), and two equivalent C(1) atoms to form distorted TbC5 square pyramids that share  a cornercorner with one C(2)Tb4OsC octahedra, corners with three equivalent Tb(1)C5 square pyramids,  a cornercorner with one C(3)Tb4C trigonal bipyramid, and  an edgeedge with one Tb(1)C5 square pyramid. The corner-sharing octahedral tilt angles are 42°. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent C(2), two equivalent C(3), and four equivalent C(1) atoms. In the third Tb site, Tb(3) is bonded in a rectangular see-saw-like geometry to two equivalent C(1) and two equivalent C(4) atoms. There are two inequivalent Os sites. In the first Os site, Os(1) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(4) atoms. In the second Os site, Os(2) is bonded in a trigonal planar geometry to three equivalent C(1) atoms. There are four inequivalent C sites. In the first C site, C(1) is bonded to one Tb(3), two equivalent Tb(1), two equivalent Tb(2), and one Os(2) atom to form CTb5Os octahedra that share corners with two equivalent C(2)Tb4OsC octahedra, corners with five equivalent C(1)Tb5Os octahedra, corners with two equivalent C(3)Tb4C trigonal bipyramids, edges with two equivalent C(4)Tb4Os2 octahedra, edges with two equivalent C(2)Tb4OsC octahedra, edges with three equivalent C(1)Tb5Os octahedra, and edges with two equivalent C(3)Tb4C trigonal bipyramids. The corner-sharing octahedral tilt angles range from 6-73°. In the second C site, C(2) is bonded to two equivalent Tb(1), two equivalent Tb(2), one Os(1), and one C(3) atom to form distorted CTb4OsC octahedra that share corners with two equivalent C(2)Tb4OsC octahedra, corners with four equivalent C(1)Tb5Os octahedra, corners with two equivalent Tb(1)C5 square pyramids, corners with four equivalent C(3)Tb4C trigonal bipyramids, edges with two equivalent C(4)Tb4Os2 octahedra, edges with four equivalent C(1)Tb5Os octahedra, and  an edgeedge with one C(3)Tb4C trigonal bipyramid. The corner-sharing octahedral tilt angles range from 46-73°. In the third C site, C(3) is bonded to two equivalent Tb(1), two equivalent Tb(2), and one C(2) atom to form distorted CTb4C trigonal bipyramids that share corners with four equivalent C(2)Tb4OsC octahedra, corners with four equivalent C(1)Tb5Os octahedra, corners with two equivalent Tb(1)C5 square pyramids, corners with two equivalent C(3)Tb4C trigonal bipyramids,  an edgeedge with one C(4)Tb4Os2 octahedra,  an edgeedge with one C(2)Tb4OsC octahedra, and edges with four equivalent C(1)Tb5Os octahedra. The corner-sharing octahedral tilt angles range from 9-88°. In the fourth C site, C(4) is bonded to two equivalent Tb(1), two equivalent Tb(3), and two equivalent Os(1) atoms to form CTb4Os2 octahedra that share corners with four equivalent C(4)Tb4Os2 octahedra, edges with two equivalent C(2)Tb4OsC octahedra, edges with four equivalent C(1)Tb5Os octahedra, and  an edgeedge with one C(3)Tb4C trigonal bipyramid. The corner-sharing octahedral tilt angles range from 0-35°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb12(OsC3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.721
_cell_length_b   10.721
_cell_length_c   5.099
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   507.571
_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
  Tb  Tb0  1  0.272  0.456  1.000  1.0
  Tb  Tb1  1  0.184  0.728  1.000  1.0
  Tb  Tb2  1  0.544  0.816  0.000  1.0
  Tb  Tb3  1  0.816  0.544  1.000  1.0
  Tb  Tb4  1  0.728  0.184  0.000  1.0
  Tb  Tb5  1  0.456  0.272  0.000  1.0
  Tb  Tb6  1  0.435  0.000  0.500  1.0
  Tb  Tb7  1  0.565  0.565  0.500  1.0
  Tb  Tb8  1  1.000  0.435  0.500  1.0
  Tb  Tb9  1  0.793  1.000  0.500  1.0
  Tb  Tb10  1  0.207  0.207  0.500  1.0
  Tb  Tb11  1  0.000  0.793  0.500  1.0
  Os  Os12  1  0.160  1.000  1.000  1.0
  Os  Os13  1  0.839  0.840  0.000  1.0
  Os  Os14  1  0.000  0.161  0.000  1.0
  Os  Os15  1  0.333  0.667  0.500  1.0
  Os  Os16  1  0.667  0.333  0.500  1.0
  C  C17  1  0.284  0.469  0.500  1.0
  C  C18  1  0.185  0.716  0.500  1.0
  C  C19  1  0.531  0.815  0.500  1.0
  C  C20  1  0.815  0.531  0.500  1.0
  C  C21  1  0.716  0.185  0.500  1.0
  C  C22  1  0.469  0.284  0.500  1.0
  C  C23  1  0.335  1.000  0.000  1.0
  C  C24  1  0.665  0.665  0.000  1.0
  C  C25  1  0.000  0.335  0.000  1.0
  C  C26  1  0.459  0.000  0.000  1.0
  C  C27  1  0.541  0.541  1.000  1.0
  C  C28  1  1.000  0.459  1.000  1.0
  C  C29  1  0.793  0.000  0.000  1.0
  C  C30  1  0.208  0.207  1.000  1.0
  C  C31  1  1.000  0.792  1.000  1.0
[/CIF]
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The material structure described by Tb12Os5C15 crystallizes in the hexagonal P-62m space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one C(2), one C(3), one C(4), and two equivalent C(1) atoms to form distorted TbC5 square pyramids that share  a cornercorner with one C(2)Tb4OsC octahedra, corners with three equivalent Tb(1)C5 square pyramids,  a cornercorner with one C(3)Tb4C trigonal bipyramid, and  an edgeedge with one Tb(1)C5 square pyramid. The corner-sharing octahedral tilt angles are 42°. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent C(2), two equivalent C(3), and four equivalent C(1) atoms. In the third Tb site, Tb(3) is bonded in a rectangular see-saw-like geometry to two equivalent C(1) and two equivalent C(4) atoms. There are two inequivalent Os sites. In the first Os site, Os(1) is bonded in a 3-coordinate geometry to one C(2) and two equivalent C(4) atoms. In the second Os site, Os(2) is bonded in a trigonal planar geometry to three equivalent C(1) atoms. There are four inequivalent C sites. In the first C site, C(1) is bonded to one Tb(3), two equivalent Tb(1), two equivalent Tb(2), and one Os(2) atom to form CTb5Os octahedra that share corners with two equivalent C(2)Tb4OsC octahedra, corners with five equivalent C(1)Tb5Os octahedra, corners with two equivalent C(3)Tb4C trigonal bipyramids, edges with two equivalent C(4)Tb4Os2 octahedra, edges with two equivalent C(2)Tb4OsC octahedra, edges with three equivalent C(1)Tb5Os octahedra, and edges with two equivalent C(3)Tb4C trigonal bipyramids. The corner-sharing octahedral tilt angles range from 6-73°. In the second C site, C(2) is bonded to two equivalent Tb(1), two equivalent Tb(2), one Os(1), and one C(3) atom to form distorted CTb4OsC octahedra that share corners with two equivalent C(2)Tb4OsC octahedra, corners with four equivalent C(1)Tb5Os octahedra, corners with two equivalent Tb(1)C5 square pyramids, corners with four equivalent C(3)Tb4C trigonal bipyramids, edges with two equivalent C(4)Tb4Os2 octahedra, edges with four equivalent C(1)Tb5Os octahedra, and  an edgeedge with one C(3)Tb4C trigonal bipyramid. The corner-sharing octahedral tilt angles range from 46-73°. In the third C site, C(3) is bonded to two equivalent Tb(1), two equivalent Tb(2), and one C(2) atom to form distorted CTb4C trigonal bipyramids that share corners with four equivalent C(2)Tb4OsC octahedra, corners with four equivalent C(1)Tb5Os octahedra, corners with two equivalent Tb(1)C5 square pyramids, corners with two equivalent C(3)Tb4C trigonal bipyramids,  an edgeedge with one C(4)Tb4Os2 octahedra,  an edgeedge with one C(2)Tb4OsC octahedra, and edges with four equivalent C(1)Tb5Os octahedra. The corner-sharing octahedral tilt angles range from 9-88°. In the fourth C site, C(4) is bonded to two equivalent Tb(1), two equivalent Tb(3), and two equivalent Os(1) atoms to form CTb4Os2 octahedra that share corners with four equivalent C(4)Tb4Os2 octahedra, edges with two equivalent C(2)Tb4OsC octahedra, edges with four equivalent C(1)Tb5Os octahedra, and  an edgeedge with one C(3)Tb4C trigonal bipyramid. The corner-sharing octahedral tilt angles range from 0-35°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb12(OsC3)5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.721
_cell_length_b   10.721
_cell_length_c   5.099
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.999
_symmetry_Int_Tables_number   1
_cell_volume   507.571
_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
  Tb  Tb0  1  0.272  0.456  1.000  1.0
  Tb  Tb1  1  0.184  0.728  1.000  1.0
  Tb  Tb2  1  0.544  0.816  0.000  1.0
  Tb  Tb3  1  0.816  0.544  1.000  1.0
  Tb  Tb4  1  0.728  0.184  0.000  1.0
  Tb  Tb5  1  0.456  0.272  0.000  1.0
  Tb  Tb6  1  0.435  0.000  0.500  1.0
  Tb  Tb7  1  0.565  0.565  0.500  1.0
  Tb  Tb8  1  1.000  0.435  0.500  1.0
  Tb  Tb9  1  0.793  1.000  0.500  1.0
  Tb  Tb10  1  0.207  0.207  0.500  1.0
  Tb  Tb11  1  0.000  0.793  0.500  1.0
  Os  Os12  1  0.160  1.000  1.000  1.0
  Os  Os13  1  0.839  0.840  0.000  1.0
  Os  Os14  1  0.000  0.161  0.000  1.0
  Os  Os15  1  0.333  0.667  0.500  1.0
  Os  Os16  1  0.667  0.333  0.500  1.0
  C  C17  1  0.284  0.469  0.500  1.0
  C  C18  1  0.185  0.716  0.500  1.0
  C  C19  1  0.531  0.815  0.500  1.0
  C  C20  1  0.815  0.531  0.500  1.0
  C  C21  1  0.716  0.185  0.500  1.0
  C  C22  1  0.469  0.284  0.500  1.0
  C  C23  1  0.335  1.000  0.000  1.0
  C  C24  1  0.665  0.665  0.000  1.0
  C  C25  1  0.000  0.335  0.000  1.0
  C  C26  1  0.459  0.000  0.000  1.0
  C  C27  1  0.541  0.541  1.000  1.0
  C  C28  1  1.000  0.459  1.000  1.0
  C  C29  1  0.793  0.000  0.000  1.0
  C  C30  1  0.208  0.207  1.000  1.0
  C  C31  1  1.000  0.792  1.000  1.0
[/CIF]
.