The crystal structure described by Ag3Tb is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. Tb(1) is bonded to four equivalent Ag(2) and eight equivalent Ag(1) atoms to form TbAg12 cuboctahedra that share corners with four equivalent Tb(1)Ag12 cuboctahedra, corners with eight equivalent Ag(2)Tb4Ag8 cuboctahedra, edges with eight equivalent Tb(1)Ag12 cuboctahedra, faces with four equivalent Tb(1)Ag12 cuboctahedra, and faces with six equivalent Ag(2)Tb4Ag8 cuboctahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to four equivalent Tb(1) and four equivalent Ag(2) atoms. In the second Ag site, Ag(2) is bonded to four equivalent Tb(1) and eight equivalent Ag(1) atoms to form distorted AgTb4Ag8 cuboctahedra that share corners with four equivalent Ag(2)Tb4Ag8 cuboctahedra, corners with eight equivalent Tb(1)Ag12 cuboctahedra, edges with eight equivalent Ag(2)Tb4Ag8 cuboctahedra, faces with four equivalent Ag(2)Tb4Ag8 cuboctahedra, and faces with six equivalent Tb(1)Ag12 cuboctahedra. is represented by the CIF file [CIF]
data_TbAg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.171
_cell_length_b   5.171
_cell_length_c   5.171
_cell_angle_alpha   129.275
_cell_angle_beta   129.275
_cell_angle_gamma   74.568
_symmetry_Int_Tables_number   1
_cell_volume   80.754
_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  0.000  0.000  0.000  1.0
  Ag  Ag1  1  0.750  0.250  0.500  1.0
  Ag  Ag2  1  0.250  0.750  0.500  1.0
  Ag  Ag3  1  0.500  0.500  0.000  1.0
[/CIF]
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The crystal structure described by Ag3Tb is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. Tb(1) is bonded to four equivalent Ag(2) and eight equivalent Ag(1) atoms to form TbAg12 cuboctahedra that share corners with four equivalent Tb(1)Ag12 cuboctahedra, corners with eight equivalent Ag(2)Tb4Ag8 cuboctahedra, edges with eight equivalent Tb(1)Ag12 cuboctahedra, faces with four equivalent Tb(1)Ag12 cuboctahedra, and faces with six equivalent Ag(2)Tb4Ag8 cuboctahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to four equivalent Tb(1) and four equivalent Ag(2) atoms. In the second Ag site, Ag(2) is bonded to four equivalent Tb(1) and eight equivalent Ag(1) atoms to form distorted AgTb4Ag8 cuboctahedra that share corners with four equivalent Ag(2)Tb4Ag8 cuboctahedra, corners with eight equivalent Tb(1)Ag12 cuboctahedra, edges with eight equivalent Ag(2)Tb4Ag8 cuboctahedra, faces with four equivalent Ag(2)Tb4Ag8 cuboctahedra, and faces with six equivalent Tb(1)Ag12 cuboctahedra. is represented by the CIF file [CIF]
data_TbAg3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.171
_cell_length_b   5.171
_cell_length_c   5.171
_cell_angle_alpha   129.275
_cell_angle_beta   129.275
_cell_angle_gamma   74.568
_symmetry_Int_Tables_number   1
_cell_volume   80.754
_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  0.000  0.000  0.000  1.0
  Ag  Ag1  1  0.750  0.250  0.500  1.0
  Ag  Ag2  1  0.250  0.750  0.500  1.0
  Ag  Ag3  1  0.500  0.500  0.000  1.0
[/CIF]
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