The crystal structure described by ErTb(TiFe11)2 crystallizes in the monoclinic Cm space group. Er(1) is bonded in a 20-coordinate geometry to one Ti(2), one Fe(14), one Fe(15), one Fe(17), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(6), two equivalent Fe(7), two equivalent Fe(9), and four equivalent Fe(11) atoms. Tb(1) is bonded in a 20-coordinate geometry to one Ti(1), one Fe(13), one Fe(16), one Fe(18), two equivalent Fe(10), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(8), two equivalent Fe(9), and four equivalent Fe(12) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 14-coordinate geometry to one Tb(1), one Fe(1), one Fe(17), one Fe(3), two equivalent Fe(12), two equivalent Fe(13), two equivalent Fe(15), two equivalent Fe(5), and two equivalent Fe(9) atoms. In the second Ti site, Ti(2) is bonded in a 14-coordinate geometry to one Er(1), one Fe(18), one Fe(2), one Fe(4), two equivalent Fe(10), two equivalent Fe(11), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(6) atoms. There are eighteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Er(1), one Ti(1), one Fe(17), one Fe(6), one Fe(7), two equivalent Fe(11), two equivalent Fe(15), and two equivalent Fe(9) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one Ti(2), one Fe(18), one Fe(5), one Fe(8), two equivalent Fe(10), two equivalent Fe(12), and two equivalent Fe(16) atoms. In the third Fe site, Fe(3) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one Ti(1), one Fe(17), one Fe(5), one Fe(8), two equivalent Fe(12), two equivalent Fe(13), and two equivalent Fe(9) atoms. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to two equivalent Er(1), one Ti(2), one Fe(18), one Fe(6), one Fe(7), two equivalent Fe(10), two equivalent Fe(11), and two equivalent Fe(14) atoms. In the fifth Fe site, Fe(5) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Ti(1), one Fe(13), one Fe(15), one Fe(2), one Fe(3), two equivalent Fe(12), and two equivalent Fe(9) atoms. In the sixth Fe site, Fe(6) is bonded in a 12-coordinate geometry to two equivalent Er(1), two equivalent Ti(2), one Fe(1), one Fe(14), one Fe(16), one Fe(4), two equivalent Fe(10), and two equivalent Fe(11) atoms. In the seventh Fe site, Fe(7) is bonded to two equivalent Er(1), one Fe(1), one Fe(13), one Fe(15), one Fe(4), two equivalent Fe(11), two equivalent Fe(17), and two equivalent Fe(9) atoms to form distorted FeEr2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(7)Er2Fe10 cuboctahedra, edges with two equivalent Fe(11)Er2TiFe9 cuboctahedra, edges with two equivalent Fe(10)TbErTiFe9 cuboctahedra, faces with four equivalent Fe(11)Er2TiFe9 cuboctahedra, and faces with four equivalent Fe(9)TbErTiFe9 cuboctahedra. In the eighth Fe site, Fe(8) is bonded to two equivalent Tb(1), one Fe(14), one Fe(16), one Fe(2), one Fe(3), two equivalent Fe(10), two equivalent Fe(12), and two equivalent Fe(18) atoms to form distorted FeTb2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(8)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, edges with two equivalent Fe(9)TbErTiFe9 cuboctahedra, faces with four equivalent Fe(12)Tb2TiFe9 cuboctahedra, and faces with four equivalent Fe(10)TbErTiFe9 cuboctahedra. In the ninth Fe site, Fe(9) is bonded to one Er(1), one Tb(1), one Ti(1), one Fe(1), one Fe(13), one Fe(15), one Fe(17), one Fe(3), one Fe(5), one Fe(7), and two equivalent Fe(9) atoms to form distorted FeTbErTiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, corners with four equivalent Fe(10)TbErTiFe9 cuboctahedra,  an edgeedge with one Fe(8)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(11)Er2TiFe9 cuboctahedra, edges with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, faces with two equivalent Fe(7)Er2Fe10 cuboctahedra, faces with two equivalent Fe(11)Er2TiFe9 cuboctahedra, faces with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, and faces with two equivalent Fe(9)TbErTiFe9 cuboctahedra. In the tenth Fe site, Fe(10) is bonded to one Er(1), one Tb(1), one Ti(2), one Fe(14), one Fe(16), one Fe(18), one Fe(2), one Fe(4), one Fe(6), one Fe(8), and two equivalent Fe(10) atoms to form distorted FeTbErTiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with four equivalent Fe(9)TbErTiFe9 cuboctahedra,  an edgeedge with one Fe(7)Er2Fe10 cuboctahedra, edges with two equivalent Fe(11)Er2TiFe9 cuboctahedra, edges with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, faces with two equivalent Fe(11)Er2TiFe9 cuboctahedra, faces with two equivalent Fe(8)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, and faces with two equivalent Fe(10)TbErTiFe9 cuboctahedra. In the eleventh Fe site, Fe(11) is bonded to two equivalent Er(1), one Ti(2), one Fe(1), one Fe(14), one Fe(15), one Fe(17), one Fe(4), one Fe(6), one Fe(7), and two equivalent Fe(11) atoms to form distorted FeEr2TiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, corners with six equivalent Fe(11)Er2TiFe9 cuboctahedra,  an edgeedge with one Fe(7)Er2Fe10 cuboctahedra, edges with two equivalent Fe(10)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(9)TbErTiFe9 cuboctahedra, faces with two equivalent Fe(7)Er2Fe10 cuboctahedra, faces with two equivalent Fe(11)Er2TiFe9 cuboctahedra, faces with two equivalent Fe(10)TbErTiFe9 cuboctahedra, and faces with two equivalent Fe(9)TbErTiFe9 cuboctahedra. In the twelfth Fe site, Fe(12) is bonded to two equivalent Tb(1), one Ti(1), one Fe(13), one Fe(16), one Fe(18), one Fe(2), one Fe(3), one Fe(5), one Fe(8), and two equivalent Fe(12) atoms to form distorted FeTb2TiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, corners with six equivalent Fe(12)Tb2TiFe9 cuboctahedra,  an edgeedge with one Fe(8)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(10)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(9)TbErTiFe9 cuboctahedra, faces with two equivalent Fe(8)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, faces with two equivalent Fe(10)TbErTiFe9 cuboctahedra, and faces with two equivalent Fe(9)TbErTiFe9 cuboctahedra. In the thirteenth Fe site, Fe(13) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent Ti(1), one Fe(15), one Fe(5), one Fe(7), two equivalent Fe(12), two equivalent Fe(17), two equivalent Fe(3), and two equivalent Fe(9) atoms. In the fourteenth Fe site, Fe(14) is bonded in a 14-coordinate geometry to one Er(1), two equivalent Ti(2), one Fe(16), one Fe(6), one Fe(8), two equivalent Fe(10), two equivalent Fe(11), two equivalent Fe(18), and two equivalent Fe(4) atoms. In the fifteenth Fe site, Fe(15) is bonded in a 14-coordinate geometry to one Er(1), two equivalent Ti(1), one Fe(13), one Fe(5), one Fe(7), two equivalent Fe(1), two equivalent Fe(11), two equivalent Fe(17), and two equivalent Fe(9) atoms. In the sixteenth Fe site, Fe(16) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent Ti(2), one Fe(14), one Fe(6), one Fe(8), two equivalent Fe(10), two equivalent Fe(12), two equivalent Fe(18), and two equivalent Fe(2) atoms. In the seventeenth Fe site, Fe(17) is bonded in a 1-coordinate geometry to one Er(1), one Ti(1), one Fe(1), one Fe(3), two equivalent Fe(11), two equivalent Fe(13), two equivalent Fe(15), two equivalent Fe(7), and two equivalent Fe(9) atoms. In the eighteenth Fe site, Fe(18) is bonded in a 1-coordinate geometry to one Tb(1), one Ti(2), one Fe(2), one Fe(4), two equivalent Fe(10), two equivalent Fe(12), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(8) atoms. is represented by the CIF card [CIF]
data_TbEr(TiFe11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.712
_cell_length_b   6.431
_cell_length_c   11.968
_cell_angle_alpha   89.911
_cell_angle_beta   90.000
_cell_angle_gamma   111.490
_symmetry_Int_Tables_number   1
_cell_volume   337.444
_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  0.503  0.006  0.503  1.0
  Er  Er1  1  0.003  0.006  0.003  1.0
  Ti  Ti2  1  0.316  0.632  0.316  1.0
  Ti  Ti3  1  0.816  0.632  0.817  1.0
  Fe  Fe4  1  0.390  0.781  0.108  1.0
  Fe  Fe5  1  0.889  0.778  0.611  1.0
  Fe  Fe6  1  0.110  0.220  0.389  1.0
  Fe  Fe7  1  0.609  0.218  0.891  1.0
  Fe  Fe8  1  0.887  0.775  0.387  1.0
  Fe  Fe9  1  0.388  0.776  0.889  1.0
  Fe  Fe10  1  0.615  0.230  0.115  1.0
  Fe  Fe11  1  0.116  0.232  0.616  1.0
  Fe  Fe12  1  0.251  0.002  0.249  1.0
  Fe  Fe13  1  0.751  0.002  0.751  1.0
  Fe  Fe14  1  0.751  0.002  0.249  1.0
  Fe  Fe15  1  0.251  0.002  0.751  1.0
  Fe  Fe16  1  0.000  0.500  0.001  1.0
  Fe  Fe17  1  0.500  0.500  0.501  1.0
  Fe  Fe18  1  0.500  0.500  0.001  1.0
  Fe  Fe19  1  1.000  0.500  0.501  1.0
  Fe  Fe20  1  0.678  0.357  0.321  1.0
  Fe  Fe21  1  0.178  0.356  0.822  1.0
  Fe  Fe22  1  0.822  0.644  0.178  1.0
  Fe  Fe23  1  0.322  0.643  0.679  1.0
  Fe  Fe24  1  0.177  0.353  0.176  1.0
  Fe  Fe25  1  0.677  0.353  0.677  1.0
[/CIF]
.
The crystal structure described by ErTb(TiFe11)2 crystallizes in the monoclinic Cm space group. Er(1) is bonded in a 20-coordinate geometry to one Ti(2), one Fe(14), one Fe(15), one Fe(17), two equivalent Fe(1), two equivalent Fe(10), two equivalent Fe(4), two equivalent Fe(6), two equivalent Fe(7), two equivalent Fe(9), and four equivalent Fe(11) atoms. Tb(1) is bonded in a 20-coordinate geometry to one Ti(1), one Fe(13), one Fe(16), one Fe(18), two equivalent Fe(10), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(5), two equivalent Fe(8), two equivalent Fe(9), and four equivalent Fe(12) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 14-coordinate geometry to one Tb(1), one Fe(1), one Fe(17), one Fe(3), two equivalent Fe(12), two equivalent Fe(13), two equivalent Fe(15), two equivalent Fe(5), and two equivalent Fe(9) atoms. In the second Ti site, Ti(2) is bonded in a 14-coordinate geometry to one Er(1), one Fe(18), one Fe(2), one Fe(4), two equivalent Fe(10), two equivalent Fe(11), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(6) atoms. There are eighteen inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Er(1), one Ti(1), one Fe(17), one Fe(6), one Fe(7), two equivalent Fe(11), two equivalent Fe(15), and two equivalent Fe(9) atoms. In the second Fe site, Fe(2) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one Ti(2), one Fe(18), one Fe(5), one Fe(8), two equivalent Fe(10), two equivalent Fe(12), and two equivalent Fe(16) atoms. In the third Fe site, Fe(3) is bonded in a 12-coordinate geometry to two equivalent Tb(1), one Ti(1), one Fe(17), one Fe(5), one Fe(8), two equivalent Fe(12), two equivalent Fe(13), and two equivalent Fe(9) atoms. In the fourth Fe site, Fe(4) is bonded in a 12-coordinate geometry to two equivalent Er(1), one Ti(2), one Fe(18), one Fe(6), one Fe(7), two equivalent Fe(10), two equivalent Fe(11), and two equivalent Fe(14) atoms. In the fifth Fe site, Fe(5) is bonded in a 12-coordinate geometry to two equivalent Tb(1), two equivalent Ti(1), one Fe(13), one Fe(15), one Fe(2), one Fe(3), two equivalent Fe(12), and two equivalent Fe(9) atoms. In the sixth Fe site, Fe(6) is bonded in a 12-coordinate geometry to two equivalent Er(1), two equivalent Ti(2), one Fe(1), one Fe(14), one Fe(16), one Fe(4), two equivalent Fe(10), and two equivalent Fe(11) atoms. In the seventh Fe site, Fe(7) is bonded to two equivalent Er(1), one Fe(1), one Fe(13), one Fe(15), one Fe(4), two equivalent Fe(11), two equivalent Fe(17), and two equivalent Fe(9) atoms to form distorted FeEr2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(7)Er2Fe10 cuboctahedra, edges with two equivalent Fe(11)Er2TiFe9 cuboctahedra, edges with two equivalent Fe(10)TbErTiFe9 cuboctahedra, faces with four equivalent Fe(11)Er2TiFe9 cuboctahedra, and faces with four equivalent Fe(9)TbErTiFe9 cuboctahedra. In the eighth Fe site, Fe(8) is bonded to two equivalent Tb(1), one Fe(14), one Fe(16), one Fe(2), one Fe(3), two equivalent Fe(10), two equivalent Fe(12), and two equivalent Fe(18) atoms to form distorted FeTb2Fe10 cuboctahedra that share corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(8)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, edges with two equivalent Fe(9)TbErTiFe9 cuboctahedra, faces with four equivalent Fe(12)Tb2TiFe9 cuboctahedra, and faces with four equivalent Fe(10)TbErTiFe9 cuboctahedra. In the ninth Fe site, Fe(9) is bonded to one Er(1), one Tb(1), one Ti(1), one Fe(1), one Fe(13), one Fe(15), one Fe(17), one Fe(3), one Fe(5), one Fe(7), and two equivalent Fe(9) atoms to form distorted FeTbErTiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, corners with four equivalent Fe(10)TbErTiFe9 cuboctahedra,  an edgeedge with one Fe(8)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(11)Er2TiFe9 cuboctahedra, edges with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, faces with two equivalent Fe(7)Er2Fe10 cuboctahedra, faces with two equivalent Fe(11)Er2TiFe9 cuboctahedra, faces with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, and faces with two equivalent Fe(9)TbErTiFe9 cuboctahedra. In the tenth Fe site, Fe(10) is bonded to one Er(1), one Tb(1), one Ti(2), one Fe(14), one Fe(16), one Fe(18), one Fe(2), one Fe(4), one Fe(6), one Fe(8), and two equivalent Fe(10) atoms to form distorted FeTbErTiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(11)Er2TiFe9 cuboctahedra, corners with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with four equivalent Fe(9)TbErTiFe9 cuboctahedra,  an edgeedge with one Fe(7)Er2Fe10 cuboctahedra, edges with two equivalent Fe(11)Er2TiFe9 cuboctahedra, edges with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, faces with two equivalent Fe(11)Er2TiFe9 cuboctahedra, faces with two equivalent Fe(8)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, and faces with two equivalent Fe(10)TbErTiFe9 cuboctahedra. In the eleventh Fe site, Fe(11) is bonded to two equivalent Er(1), one Ti(2), one Fe(1), one Fe(14), one Fe(15), one Fe(17), one Fe(4), one Fe(6), one Fe(7), and two equivalent Fe(11) atoms to form distorted FeEr2TiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, corners with six equivalent Fe(11)Er2TiFe9 cuboctahedra,  an edgeedge with one Fe(7)Er2Fe10 cuboctahedra, edges with two equivalent Fe(10)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(9)TbErTiFe9 cuboctahedra, faces with two equivalent Fe(7)Er2Fe10 cuboctahedra, faces with two equivalent Fe(11)Er2TiFe9 cuboctahedra, faces with two equivalent Fe(10)TbErTiFe9 cuboctahedra, and faces with two equivalent Fe(9)TbErTiFe9 cuboctahedra. In the twelfth Fe site, Fe(12) is bonded to two equivalent Tb(1), one Ti(1), one Fe(13), one Fe(16), one Fe(18), one Fe(2), one Fe(3), one Fe(5), one Fe(8), and two equivalent Fe(12) atoms to form distorted FeTb2TiFe9 cuboctahedra that share  a cornercorner with one Fe(7)Er2Fe10 cuboctahedra,  a cornercorner with one Fe(8)Tb2Fe10 cuboctahedra, corners with two equivalent Fe(10)TbErTiFe9 cuboctahedra, corners with two equivalent Fe(9)TbErTiFe9 cuboctahedra, corners with six equivalent Fe(12)Tb2TiFe9 cuboctahedra,  an edgeedge with one Fe(8)Tb2Fe10 cuboctahedra, edges with two equivalent Fe(10)TbErTiFe9 cuboctahedra, edges with two equivalent Fe(9)TbErTiFe9 cuboctahedra, faces with two equivalent Fe(8)Tb2Fe10 cuboctahedra, faces with two equivalent Fe(12)Tb2TiFe9 cuboctahedra, faces with two equivalent Fe(10)TbErTiFe9 cuboctahedra, and faces with two equivalent Fe(9)TbErTiFe9 cuboctahedra. In the thirteenth Fe site, Fe(13) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent Ti(1), one Fe(15), one Fe(5), one Fe(7), two equivalent Fe(12), two equivalent Fe(17), two equivalent Fe(3), and two equivalent Fe(9) atoms. In the fourteenth Fe site, Fe(14) is bonded in a 14-coordinate geometry to one Er(1), two equivalent Ti(2), one Fe(16), one Fe(6), one Fe(8), two equivalent Fe(10), two equivalent Fe(11), two equivalent Fe(18), and two equivalent Fe(4) atoms. In the fifteenth Fe site, Fe(15) is bonded in a 14-coordinate geometry to one Er(1), two equivalent Ti(1), one Fe(13), one Fe(5), one Fe(7), two equivalent Fe(1), two equivalent Fe(11), two equivalent Fe(17), and two equivalent Fe(9) atoms. In the sixteenth Fe site, Fe(16) is bonded in a 14-coordinate geometry to one Tb(1), two equivalent Ti(2), one Fe(14), one Fe(6), one Fe(8), two equivalent Fe(10), two equivalent Fe(12), two equivalent Fe(18), and two equivalent Fe(2) atoms. In the seventeenth Fe site, Fe(17) is bonded in a 1-coordinate geometry to one Er(1), one Ti(1), one Fe(1), one Fe(3), two equivalent Fe(11), two equivalent Fe(13), two equivalent Fe(15), two equivalent Fe(7), and two equivalent Fe(9) atoms. In the eighteenth Fe site, Fe(18) is bonded in a 1-coordinate geometry to one Tb(1), one Ti(2), one Fe(2), one Fe(4), two equivalent Fe(10), two equivalent Fe(12), two equivalent Fe(14), two equivalent Fe(16), and two equivalent Fe(8) atoms. is represented by the CIF card [CIF]
data_TbEr(TiFe11)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.712
_cell_length_b   6.431
_cell_length_c   11.968
_cell_angle_alpha   89.911
_cell_angle_beta   90.000
_cell_angle_gamma   111.490
_symmetry_Int_Tables_number   1
_cell_volume   337.444
_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  0.503  0.006  0.503  1.0
  Er  Er1  1  0.003  0.006  0.003  1.0
  Ti  Ti2  1  0.316  0.632  0.316  1.0
  Ti  Ti3  1  0.816  0.632  0.817  1.0
  Fe  Fe4  1  0.390  0.781  0.108  1.0
  Fe  Fe5  1  0.889  0.778  0.611  1.0
  Fe  Fe6  1  0.110  0.220  0.389  1.0
  Fe  Fe7  1  0.609  0.218  0.891  1.0
  Fe  Fe8  1  0.887  0.775  0.387  1.0
  Fe  Fe9  1  0.388  0.776  0.889  1.0
  Fe  Fe10  1  0.615  0.230  0.115  1.0
  Fe  Fe11  1  0.116  0.232  0.616  1.0
  Fe  Fe12  1  0.251  0.002  0.249  1.0
  Fe  Fe13  1  0.751  0.002  0.751  1.0
  Fe  Fe14  1  0.751  0.002  0.249  1.0
  Fe  Fe15  1  0.251  0.002  0.751  1.0
  Fe  Fe16  1  0.000  0.500  0.001  1.0
  Fe  Fe17  1  0.500  0.500  0.501  1.0
  Fe  Fe18  1  0.500  0.500  0.001  1.0
  Fe  Fe19  1  1.000  0.500  0.501  1.0
  Fe  Fe20  1  0.678  0.357  0.321  1.0
  Fe  Fe21  1  0.178  0.356  0.822  1.0
  Fe  Fe22  1  0.822  0.644  0.178  1.0
  Fe  Fe23  1  0.322  0.643  0.679  1.0
  Fe  Fe24  1  0.177  0.353  0.176  1.0
  Fe  Fe25  1  0.677  0.353  0.677  1.0
[/CIF]
.