The material structure described by SrTb3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Sr(1) is bonded to four equivalent Tb(2) and eight equivalent Tb(1) atoms to form SrTb12 cuboctahedra that share corners with four equivalent Sr(1)Tb12 cuboctahedra, corners with eight equivalent Tb(2)Sr4Tb8 cuboctahedra, edges with eight equivalent Sr(1)Tb12 cuboctahedra, edges with sixteen equivalent Tb(1)Sr4Tb8 cuboctahedra, faces with four equivalent Sr(1)Tb12 cuboctahedra, faces with six equivalent Tb(2)Sr4Tb8 cuboctahedra, and faces with eight equivalent Tb(1)Sr4Tb8 cuboctahedra. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Sr(1), four equivalent Tb(1), and four equivalent Tb(2) atoms to form TbSr4Tb8 cuboctahedra that share corners with twelve equivalent Tb(1)Sr4Tb8 cuboctahedra, edges with eight equivalent Sr(1)Tb12 cuboctahedra, edges with eight equivalent Tb(1)Sr4Tb8 cuboctahedra, edges with eight equivalent Tb(2)Sr4Tb8 cuboctahedra, faces with four equivalent Sr(1)Tb12 cuboctahedra, faces with four equivalent Tb(2)Sr4Tb8 cuboctahedra, and faces with ten equivalent Tb(1)Sr4Tb8 cuboctahedra. In the second Tb site, Tb(2) is bonded to four equivalent Sr(1) and eight equivalent Tb(1) atoms to form TbSr4Tb8 cuboctahedra that share corners with four equivalent Tb(2)Sr4Tb8 cuboctahedra, corners with eight equivalent Sr(1)Tb12 cuboctahedra, edges with eight equivalent Tb(2)Sr4Tb8 cuboctahedra, edges with sixteen equivalent Tb(1)Sr4Tb8 cuboctahedra, faces with four equivalent Tb(2)Sr4Tb8 cuboctahedra, faces with six equivalent Sr(1)Tb12 cuboctahedra, and faces with eight equivalent Tb(1)Sr4Tb8 cuboctahedra. is represented by the CIF card [CIF]
data_SrTb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.393
_cell_length_b   6.393
_cell_length_c   6.393
_cell_angle_alpha   131.957
_cell_angle_beta   131.957
_cell_angle_gamma   70.298
_symmetry_Int_Tables_number   1
_cell_volume   141.594
_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
  Sr  Sr0  1  0.000  0.000  0.000  1.0
  Tb  Tb1  1  0.750  0.250  0.500  1.0
  Tb  Tb2  1  0.250  0.750  0.500  1.0
  Tb  Tb3  1  0.500  0.500  0.000  1.0
[/CIF]
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The material structure described by SrTb3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Sr(1) is bonded to four equivalent Tb(2) and eight equivalent Tb(1) atoms to form SrTb12 cuboctahedra that share corners with four equivalent Sr(1)Tb12 cuboctahedra, corners with eight equivalent Tb(2)Sr4Tb8 cuboctahedra, edges with eight equivalent Sr(1)Tb12 cuboctahedra, edges with sixteen equivalent Tb(1)Sr4Tb8 cuboctahedra, faces with four equivalent Sr(1)Tb12 cuboctahedra, faces with six equivalent Tb(2)Sr4Tb8 cuboctahedra, and faces with eight equivalent Tb(1)Sr4Tb8 cuboctahedra. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Sr(1), four equivalent Tb(1), and four equivalent Tb(2) atoms to form TbSr4Tb8 cuboctahedra that share corners with twelve equivalent Tb(1)Sr4Tb8 cuboctahedra, edges with eight equivalent Sr(1)Tb12 cuboctahedra, edges with eight equivalent Tb(1)Sr4Tb8 cuboctahedra, edges with eight equivalent Tb(2)Sr4Tb8 cuboctahedra, faces with four equivalent Sr(1)Tb12 cuboctahedra, faces with four equivalent Tb(2)Sr4Tb8 cuboctahedra, and faces with ten equivalent Tb(1)Sr4Tb8 cuboctahedra. In the second Tb site, Tb(2) is bonded to four equivalent Sr(1) and eight equivalent Tb(1) atoms to form TbSr4Tb8 cuboctahedra that share corners with four equivalent Tb(2)Sr4Tb8 cuboctahedra, corners with eight equivalent Sr(1)Tb12 cuboctahedra, edges with eight equivalent Tb(2)Sr4Tb8 cuboctahedra, edges with sixteen equivalent Tb(1)Sr4Tb8 cuboctahedra, faces with four equivalent Tb(2)Sr4Tb8 cuboctahedra, faces with six equivalent Sr(1)Tb12 cuboctahedra, and faces with eight equivalent Tb(1)Sr4Tb8 cuboctahedra. is represented by the CIF card [CIF]
data_SrTb3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.393
_cell_length_b   6.393
_cell_length_c   6.393
_cell_angle_alpha   131.957
_cell_angle_beta   131.957
_cell_angle_gamma   70.298
_symmetry_Int_Tables_number   1
_cell_volume   141.594
_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
  Sr  Sr0  1  0.000  0.000  0.000  1.0
  Tb  Tb1  1  0.750  0.250  0.500  1.0
  Tb  Tb2  1  0.250  0.750  0.500  1.0
  Tb  Tb3  1  0.500  0.500  0.000  1.0
[/CIF]
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