The crystal structure described by TbB2C crystallizes in the tetragonal P4_2/mbc space group. Tb(1) is bonded in a 14-coordinate geometry to four equivalent B(1), six equivalent B(2), and four equivalent C(1) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a distorted water-like geometry to four equivalent Tb(1) and two equivalent C(1) atoms. In the second B site, B(2) is bonded in a distorted single-bond geometry to six equivalent Tb(1) and one C(1) atom. C(1) is bonded in a 3-coordinate geometry to four equivalent Tb(1), one B(2), and two equivalent B(1) atoms. is represented by the CIF file [CIF]
data_TbB2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.797
_cell_length_b   6.797
_cell_length_c   7.531
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   347.950
_cell_formula_units_Z   8
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  0.309  0.809  0.750  1.0
  Tb  Tb1  1  0.191  0.309  0.250  1.0
  Tb  Tb2  1  0.809  0.691  0.250  1.0
  Tb  Tb3  1  0.691  0.191  0.750  1.0
  Tb  Tb4  1  0.691  0.191  0.250  1.0
  Tb  Tb5  1  0.809  0.691  0.750  1.0
  Tb  Tb6  1  0.191  0.309  0.750  1.0
  Tb  Tb7  1  0.309  0.809  0.250  1.0
  B  B8  1  0.151  0.034  0.000  1.0
  B  B9  1  0.534  0.651  0.500  1.0
  B  B10  1  0.849  0.966  0.000  1.0
  B  B11  1  0.349  0.534  0.000  1.0
  B  B12  1  0.651  0.466  0.000  1.0
  B  B13  1  0.034  0.849  0.500  1.0
  B  B14  1  0.966  0.151  0.500  1.0
  B  B15  1  0.466  0.349  0.500  1.0
  B  B16  1  0.097  0.595  0.000  1.0
  B  B17  1  0.405  0.097  0.500  1.0
  B  B18  1  0.595  0.903  0.500  1.0
  B  B19  1  0.597  0.905  0.000  1.0
  B  B20  1  0.403  0.095  0.000  1.0
  B  B21  1  0.903  0.405  0.000  1.0
  B  B22  1  0.095  0.597  0.500  1.0
  B  B23  1  0.905  0.403  0.500  1.0
  C  C24  1  0.177  0.041  0.500  1.0
  C  C25  1  0.677  0.459  0.500  1.0
  C  C26  1  0.323  0.541  0.500  1.0
  C  C27  1  0.959  0.177  0.000  1.0
  C  C28  1  0.041  0.823  0.000  1.0
  C  C29  1  0.541  0.677  0.000  1.0
  C  C30  1  0.823  0.959  0.500  1.0
  C  C31  1  0.459  0.323  0.000  1.0
[/CIF]
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The crystal structure described by TbB2C crystallizes in the tetragonal P4_2/mbc space group. Tb(1) is bonded in a 14-coordinate geometry to four equivalent B(1), six equivalent B(2), and four equivalent C(1) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a distorted water-like geometry to four equivalent Tb(1) and two equivalent C(1) atoms. In the second B site, B(2) is bonded in a distorted single-bond geometry to six equivalent Tb(1) and one C(1) atom. C(1) is bonded in a 3-coordinate geometry to four equivalent Tb(1), one B(2), and two equivalent B(1) atoms. is represented by the CIF file [CIF]
data_TbB2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.797
_cell_length_b   6.797
_cell_length_c   7.531
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   347.950
_cell_formula_units_Z   8
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  0.309  0.809  0.750  1.0
  Tb  Tb1  1  0.191  0.309  0.250  1.0
  Tb  Tb2  1  0.809  0.691  0.250  1.0
  Tb  Tb3  1  0.691  0.191  0.750  1.0
  Tb  Tb4  1  0.691  0.191  0.250  1.0
  Tb  Tb5  1  0.809  0.691  0.750  1.0
  Tb  Tb6  1  0.191  0.309  0.750  1.0
  Tb  Tb7  1  0.309  0.809  0.250  1.0
  B  B8  1  0.151  0.034  0.000  1.0
  B  B9  1  0.534  0.651  0.500  1.0
  B  B10  1  0.849  0.966  0.000  1.0
  B  B11  1  0.349  0.534  0.000  1.0
  B  B12  1  0.651  0.466  0.000  1.0
  B  B13  1  0.034  0.849  0.500  1.0
  B  B14  1  0.966  0.151  0.500  1.0
  B  B15  1  0.466  0.349  0.500  1.0
  B  B16  1  0.097  0.595  0.000  1.0
  B  B17  1  0.405  0.097  0.500  1.0
  B  B18  1  0.595  0.903  0.500  1.0
  B  B19  1  0.597  0.905  0.000  1.0
  B  B20  1  0.403  0.095  0.000  1.0
  B  B21  1  0.903  0.405  0.000  1.0
  B  B22  1  0.095  0.597  0.500  1.0
  B  B23  1  0.905  0.403  0.500  1.0
  C  C24  1  0.177  0.041  0.500  1.0
  C  C25  1  0.677  0.459  0.500  1.0
  C  C26  1  0.323  0.541  0.500  1.0
  C  C27  1  0.959  0.177  0.000  1.0
  C  C28  1  0.041  0.823  0.000  1.0
  C  C29  1  0.541  0.677  0.000  1.0
  C  C30  1  0.823  0.959  0.500  1.0
  C  C31  1  0.459  0.323  0.000  1.0
[/CIF]
.