The crystal structure described by Tb5Co19P12 crystallizes in the hexagonal P-62m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 15-coordinate geometry to three equivalent Co(1), six equivalent Co(3), and six equivalent P(2) atoms. In the second Tb site, Tb(2) is bonded in a 16-coordinate geometry to two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), four equivalent Co(1), two equivalent P(1), and four equivalent P(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one Tb(1), two equivalent Tb(2), one P(1), one P(3), and two equivalent P(2) atoms to form distorted CoTb3P4 tetrahedra that share corners with two equivalent Co(4)Tb2P4 tetrahedra, corners with two equivalent Co(3)Tb3P4 tetrahedra, corners with five equivalent Co(1)Tb3P4 tetrahedra, edges with two equivalent Co(1)Tb3P4 tetrahedra, edges with four equivalent Co(3)Tb3P4 tetrahedra,  a faceface with one Co(1)Tb3P4 tetrahedra, faces with two equivalent Co(4)Tb2P4 tetrahedra, and faces with two equivalent Co(3)Tb3P4 tetrahedra. In the second Co site, Co(2) is bonded in a 1-coordinate geometry to one P(1) and four equivalent P(2) atoms. In the third Co site, Co(3) is bonded to one Tb(2), two equivalent Tb(1), two equivalent P(1), and two equivalent P(2) atoms to form distorted CoTb3P4 tetrahedra that share corners with two equivalent Co(4)Tb2P4 tetrahedra, corners with two equivalent Co(1)Tb3P4 tetrahedra, corners with six equivalent Co(3)Tb3P4 tetrahedra,  an edgeedge with one Co(4)Tb2P4 tetrahedra, edges with two equivalent Co(3)Tb3P4 tetrahedra, edges with four equivalent Co(1)Tb3P4 tetrahedra, faces with two equivalent Co(1)Tb3P4 tetrahedra, and faces with three equivalent Co(3)Tb3P4 tetrahedra. In the fourth Co site, Co(4) is bonded to two equivalent Tb(2), two equivalent P(2), and two equivalent P(3) atoms to form distorted CoTb2P4 tetrahedra that share corners with four equivalent Co(4)Tb2P4 tetrahedra, corners with four equivalent Co(1)Tb3P4 tetrahedra, corners with four equivalent Co(3)Tb3P4 tetrahedra, edges with two equivalent Co(3)Tb3P4 tetrahedra, and faces with four equivalent Co(1)Tb3P4 tetrahedra. In the fifth Co site, Co(5) is bonded in a distorted trigonal planar geometry to six equivalent Tb(2) and three equivalent P(3) atoms. There are three inequivalent P sites. In the first P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Tb(2), one Co(5), two equivalent Co(1), and two equivalent Co(4) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Tb(2), one Co(2), two equivalent Co(1), and four equivalent Co(3) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), one Co(4), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(3) atoms. is represented by the CIF card [CIF]
data_Tb5Co19P12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.987
_cell_length_b   11.987
_cell_length_c   3.676
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   457.414
_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  0.333  0.667  0.000  1.0
  Tb  Tb1  1  0.667  0.333  0.000  1.0
  Tb  Tb2  1  0.188  0.000  0.500  1.0
  Tb  Tb3  1  0.000  0.188  0.500  1.0
  Tb  Tb4  1  0.812  0.812  0.500  1.0
  Co  Co5  1  0.200  0.378  0.000  1.0
  Co  Co6  1  0.622  0.822  0.000  1.0
  Co  Co7  1  0.178  0.800  0.000  1.0
  Co  Co8  1  0.822  0.622  0.000  1.0
  Co  Co9  1  0.800  0.178  0.000  1.0
  Co  Co10  1  0.378  0.200  0.000  1.0
  Co  Co11  1  0.553  0.000  0.000  1.0
  Co  Co12  1  0.000  0.553  0.000  1.0
  Co  Co13  1  0.447  0.447  0.000  1.0
  Co  Co14  1  0.125  0.484  0.500  1.0
  Co  Co15  1  0.516  0.641  0.500  1.0
  Co  Co16  1  0.359  0.875  0.500  1.0
  Co  Co17  1  0.641  0.516  0.500  1.0
  Co  Co18  1  0.875  0.359  0.500  1.0
  Co  Co19  1  0.484  0.125  0.500  1.0
  Co  Co20  1  0.715  0.000  0.500  1.0
  Co  Co21  1  0.000  0.715  0.500  1.0
  Co  Co22  1  0.285  0.285  0.500  1.0
  Co  Co23  1  0.000  0.000  0.000  1.0
  P  P24  1  0.369  0.000  0.000  1.0
  P  P25  1  0.000  0.369  0.000  1.0
  P  P26  1  0.631  0.631  0.000  1.0
  P  P27  1  0.314  0.480  0.500  1.0
  P  P28  1  0.520  0.835  0.500  1.0
  P  P29  1  0.165  0.686  0.500  1.0
  P  P30  1  0.835  0.520  0.500  1.0
  P  P31  1  0.686  0.165  0.500  1.0
  P  P32  1  0.480  0.314  0.500  1.0
  P  P33  1  0.819  0.000  0.000  1.0
  P  P34  1  0.000  0.819  0.000  1.0
  P  P35  1  0.181  0.181  0.000  1.0
[/CIF]
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The crystal structure described by Tb5Co19P12 crystallizes in the hexagonal P-62m space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 15-coordinate geometry to three equivalent Co(1), six equivalent Co(3), and six equivalent P(2) atoms. In the second Tb site, Tb(2) is bonded in a 16-coordinate geometry to two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), four equivalent Co(1), two equivalent P(1), and four equivalent P(3) atoms. There are five inequivalent Co sites. In the first Co site, Co(1) is bonded to one Tb(1), two equivalent Tb(2), one P(1), one P(3), and two equivalent P(2) atoms to form distorted CoTb3P4 tetrahedra that share corners with two equivalent Co(4)Tb2P4 tetrahedra, corners with two equivalent Co(3)Tb3P4 tetrahedra, corners with five equivalent Co(1)Tb3P4 tetrahedra, edges with two equivalent Co(1)Tb3P4 tetrahedra, edges with four equivalent Co(3)Tb3P4 tetrahedra,  a faceface with one Co(1)Tb3P4 tetrahedra, faces with two equivalent Co(4)Tb2P4 tetrahedra, and faces with two equivalent Co(3)Tb3P4 tetrahedra. In the second Co site, Co(2) is bonded in a 1-coordinate geometry to one P(1) and four equivalent P(2) atoms. In the third Co site, Co(3) is bonded to one Tb(2), two equivalent Tb(1), two equivalent P(1), and two equivalent P(2) atoms to form distorted CoTb3P4 tetrahedra that share corners with two equivalent Co(4)Tb2P4 tetrahedra, corners with two equivalent Co(1)Tb3P4 tetrahedra, corners with six equivalent Co(3)Tb3P4 tetrahedra,  an edgeedge with one Co(4)Tb2P4 tetrahedra, edges with two equivalent Co(3)Tb3P4 tetrahedra, edges with four equivalent Co(1)Tb3P4 tetrahedra, faces with two equivalent Co(1)Tb3P4 tetrahedra, and faces with three equivalent Co(3)Tb3P4 tetrahedra. In the fourth Co site, Co(4) is bonded to two equivalent Tb(2), two equivalent P(2), and two equivalent P(3) atoms to form distorted CoTb2P4 tetrahedra that share corners with four equivalent Co(4)Tb2P4 tetrahedra, corners with four equivalent Co(1)Tb3P4 tetrahedra, corners with four equivalent Co(3)Tb3P4 tetrahedra, edges with two equivalent Co(3)Tb3P4 tetrahedra, and faces with four equivalent Co(1)Tb3P4 tetrahedra. In the fifth Co site, Co(5) is bonded in a distorted trigonal planar geometry to six equivalent Tb(2) and three equivalent P(3) atoms. There are three inequivalent P sites. In the first P site, P(3) is bonded in a 9-coordinate geometry to four equivalent Tb(2), one Co(5), two equivalent Co(1), and two equivalent Co(4) atoms. In the second P site, P(1) is bonded in a 9-coordinate geometry to two equivalent Tb(2), one Co(2), two equivalent Co(1), and four equivalent Co(3) atoms. In the third P site, P(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), one Co(4), two equivalent Co(1), two equivalent Co(2), and two equivalent Co(3) atoms. is represented by the CIF card [CIF]
data_Tb5Co19P12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.987
_cell_length_b   11.987
_cell_length_c   3.676
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   457.414
_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  0.333  0.667  0.000  1.0
  Tb  Tb1  1  0.667  0.333  0.000  1.0
  Tb  Tb2  1  0.188  0.000  0.500  1.0
  Tb  Tb3  1  0.000  0.188  0.500  1.0
  Tb  Tb4  1  0.812  0.812  0.500  1.0
  Co  Co5  1  0.200  0.378  0.000  1.0
  Co  Co6  1  0.622  0.822  0.000  1.0
  Co  Co7  1  0.178  0.800  0.000  1.0
  Co  Co8  1  0.822  0.622  0.000  1.0
  Co  Co9  1  0.800  0.178  0.000  1.0
  Co  Co10  1  0.378  0.200  0.000  1.0
  Co  Co11  1  0.553  0.000  0.000  1.0
  Co  Co12  1  0.000  0.553  0.000  1.0
  Co  Co13  1  0.447  0.447  0.000  1.0
  Co  Co14  1  0.125  0.484  0.500  1.0
  Co  Co15  1  0.516  0.641  0.500  1.0
  Co  Co16  1  0.359  0.875  0.500  1.0
  Co  Co17  1  0.641  0.516  0.500  1.0
  Co  Co18  1  0.875  0.359  0.500  1.0
  Co  Co19  1  0.484  0.125  0.500  1.0
  Co  Co20  1  0.715  0.000  0.500  1.0
  Co  Co21  1  0.000  0.715  0.500  1.0
  Co  Co22  1  0.285  0.285  0.500  1.0
  Co  Co23  1  0.000  0.000  0.000  1.0
  P  P24  1  0.369  0.000  0.000  1.0
  P  P25  1  0.000  0.369  0.000  1.0
  P  P26  1  0.631  0.631  0.000  1.0
  P  P27  1  0.314  0.480  0.500  1.0
  P  P28  1  0.520  0.835  0.500  1.0
  P  P29  1  0.165  0.686  0.500  1.0
  P  P30  1  0.835  0.520  0.500  1.0
  P  P31  1  0.686  0.165  0.500  1.0
  P  P32  1  0.480  0.314  0.500  1.0
  P  P33  1  0.819  0.000  0.000  1.0
  P  P34  1  0.000  0.819  0.000  1.0
  P  P35  1  0.181  0.181  0.000  1.0
[/CIF]
.