The compound described by Tb4FeSn8 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 10-coordinate geometry to two equivalent Sn(2), two equivalent Sn(5), two equivalent Sn(7), and four equivalent Sn(3) atoms. In the second Tb site, Tb(2) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(6), two equivalent Sn(8), and four equivalent Sn(4) atoms. In the third Tb site, Tb(3) is bonded in a 14-coordinate geometry to four equivalent Fe(1), two equivalent Sn(4), two equivalent Sn(5), two equivalent Sn(7), and four equivalent Sn(1) atoms. In the fourth Tb site, Tb(4) is bonded in a 10-coordinate geometry to two equivalent Sn(3), two equivalent Sn(6), two equivalent Sn(8), and four equivalent Sn(2) atoms. Fe(1) is bonded in a 5-coordinate geometry to four equivalent Tb(3), one Sn(1), two equivalent Sn(5), and two equivalent Sn(7) atoms. There are eight inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Tb(2), four equivalent Tb(3), one Fe(1), and two equivalent Sn(4) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to two equivalent Tb(1), four equivalent Tb(4), and two equivalent Sn(3) atoms. In the third Sn site, Sn(3) is bonded in a 8-coordinate geometry to two equivalent Tb(4), four equivalent Tb(1), and two equivalent Sn(2) atoms. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to two equivalent Tb(3), four equivalent Tb(2), and two equivalent Sn(1) atoms. In the fifth Sn site, Sn(5) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Fe(1), and four equivalent Sn(7) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), and four equivalent Sn(8) atoms. In the seventh Sn site, Sn(7) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Fe(1), and four equivalent Sn(5) atoms. In the eighth Sn site, Sn(8) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), and four equivalent Sn(6) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb4FeSn8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.430
_cell_length_b   4.468
_cell_length_c   16.717
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   330.903
_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  0.096  1.0
  Tb  Tb1  1  0.000  0.500  0.603  1.0
  Tb  Tb2  1  0.500  0.500  0.395  1.0
  Tb  Tb3  1  0.500  0.000  0.900  1.0
  Fe  Fe4  1  0.000  0.000  0.306  1.0
  Sn  Sn5  1  0.000  0.000  0.456  1.0
  Sn  Sn6  1  0.000  0.500  0.936  1.0
  Sn  Sn7  1  0.500  0.500  0.061  1.0
  Sn  Sn8  1  0.500  0.000  0.574  1.0
  Sn  Sn9  1  0.000  0.500  0.236  1.0
  Sn  Sn10  1  0.000  0.000  0.750  1.0
  Sn  Sn11  1  0.500  0.000  0.236  1.0
  Sn  Sn12  1  0.500  0.500  0.753  1.0
[/CIF]
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The compound described by Tb4FeSn8 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 10-coordinate geometry to two equivalent Sn(2), two equivalent Sn(5), two equivalent Sn(7), and four equivalent Sn(3) atoms. In the second Tb site, Tb(2) is bonded in a 10-coordinate geometry to two equivalent Sn(1), two equivalent Sn(6), two equivalent Sn(8), and four equivalent Sn(4) atoms. In the third Tb site, Tb(3) is bonded in a 14-coordinate geometry to four equivalent Fe(1), two equivalent Sn(4), two equivalent Sn(5), two equivalent Sn(7), and four equivalent Sn(1) atoms. In the fourth Tb site, Tb(4) is bonded in a 10-coordinate geometry to two equivalent Sn(3), two equivalent Sn(6), two equivalent Sn(8), and four equivalent Sn(2) atoms. Fe(1) is bonded in a 5-coordinate geometry to four equivalent Tb(3), one Sn(1), two equivalent Sn(5), and two equivalent Sn(7) atoms. There are eight inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Tb(2), four equivalent Tb(3), one Fe(1), and two equivalent Sn(4) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to two equivalent Tb(1), four equivalent Tb(4), and two equivalent Sn(3) atoms. In the third Sn site, Sn(3) is bonded in a 8-coordinate geometry to two equivalent Tb(4), four equivalent Tb(1), and two equivalent Sn(2) atoms. In the fourth Sn site, Sn(4) is bonded in a 8-coordinate geometry to two equivalent Tb(3), four equivalent Tb(2), and two equivalent Sn(1) atoms. In the fifth Sn site, Sn(5) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Fe(1), and four equivalent Sn(7) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), and four equivalent Sn(8) atoms. In the seventh Sn site, Sn(7) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Fe(1), and four equivalent Sn(5) atoms. In the eighth Sn site, Sn(8) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), and four equivalent Sn(6) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Tb4FeSn8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.430
_cell_length_b   4.468
_cell_length_c   16.717
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   330.903
_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  0.096  1.0
  Tb  Tb1  1  0.000  0.500  0.603  1.0
  Tb  Tb2  1  0.500  0.500  0.395  1.0
  Tb  Tb3  1  0.500  0.000  0.900  1.0
  Fe  Fe4  1  0.000  0.000  0.306  1.0
  Sn  Sn5  1  0.000  0.000  0.456  1.0
  Sn  Sn6  1  0.000  0.500  0.936  1.0
  Sn  Sn7  1  0.500  0.500  0.061  1.0
  Sn  Sn8  1  0.500  0.000  0.574  1.0
  Sn  Sn9  1  0.000  0.500  0.236  1.0
  Sn  Sn10  1  0.000  0.000  0.750  1.0
  Sn  Sn11  1  0.500  0.000  0.236  1.0
  Sn  Sn12  1  0.500  0.500  0.753  1.0
[/CIF]
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