The material described by Tb5Si2BO13 crystallizes in the monoclinic Pm space group. There are eight inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 9-coordinate geometry to one O(16), one O(17), one O(18), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Tb site, Tb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(13), one O(14), one O(15), one O(2), and one O(3) atom. In the third Tb site, Tb(3) is bonded in a 7-coordinate geometry to one O(14), one O(19), one O(7), two equivalent O(1), and two equivalent O(6) atoms. In the fourth Tb site, Tb(4) is bonded in a 6-coordinate geometry to one O(15), one O(19), two equivalent O(2), and two equivalent O(4) atoms. In the fifth Tb site, Tb(5) is bonded in a 6-coordinate geometry to one O(13), one O(19), two equivalent O(3), and two equivalent O(5) atoms. In the sixth Tb site, Tb(6) is bonded in a 7-coordinate geometry to one O(10), one O(17), one O(20), two equivalent O(3), and two equivalent O(4) atoms. In the seventh Tb site, Tb(7) is bonded in a 7-coordinate geometry to one O(11), one O(18), one O(20), two equivalent O(1), and two equivalent O(5) atoms. In the eighth Tb site, Tb(8) is bonded in a 7-coordinate geometry to one O(12), one O(16), one O(20), two equivalent O(2), and two equivalent O(6) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a tetrahedral geometry to one O(13), one O(7), and two equivalent O(2) atoms. In the second B site, B(2) is bonded in a tetrahedral geometry to one O(14), one O(8), and two equivalent O(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to one O(15), one O(9), and two equivalent O(1) atoms. In the second Si site, Si(2) is bonded in a tetrahedral geometry to one O(10), one O(16), and two equivalent O(5) atoms. In the third Si site, Si(3) is bonded in a tetrahedral geometry to one O(11), one O(17), and two equivalent O(6) atoms. In the fourth Si site, Si(4) is bonded in a tetrahedral geometry to one O(12), one O(18), and two equivalent O(4) atoms. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Tb(2), one Tb(3), one Tb(7), and one Si(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Tb(2), one Tb(4), one Tb(8), and one B(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Tb(2), one Tb(5), one Tb(6), and one B(2) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Tb(1), one Tb(4), one Tb(6), and one Si(4) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one Tb(1), one Tb(5), one Tb(7), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Tb(1), one Tb(3), one Tb(8), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Tb(3), two equivalent Tb(1), and one B(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and one B(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and one Si(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Tb(6), two equivalent Tb(2), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Tb(7), two equivalent Tb(2), and one Si(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Tb(8), two equivalent Tb(2), and one Si(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Tb(5), two equivalent Tb(2), and one B(1) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Tb(3), two equivalent Tb(2), and one B(2) atom. In the fifteenth O site, O(15) is bonded in a distorted tetrahedral geometry to one Tb(4), two equivalent Tb(2), and one Si(1) atom. In the sixteenth O site, O(16) is bonded to one Tb(8), two equivalent Tb(1), and one Si(2) atom to form distorted edge-sharing OTb3Si tetrahedra. In the seventeenth O site, O(17) is bonded to one Tb(6), two equivalent Tb(1), and one Si(3) atom to form distorted edge-sharing OTb3Si tetrahedra. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Tb(7), two equivalent Tb(1), and one Si(4) atom. In the nineteenth O site, O(19) is bonded in a trigonal planar geometry to one Tb(3), one Tb(4), and one Tb(5) atom. In the twentieth O site, O(20) is bonded in a trigonal planar geometry to one Tb(6), one Tb(7), and one Tb(8) atom. is represented by the CIF file [CIF]
data_Tb5Si2BO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.822
_cell_length_b   9.291
_cell_length_c   9.301
_cell_angle_alpha   60.390
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   512.539
_cell_formula_units_Z   2
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  0.740  0.345  0.332  1.0
  Tb  Tb1  1  0.260  0.654  0.678  1.0
  Tb  Tb2  1  0.740  0.654  0.678  1.0
  Tb  Tb3  1  0.260  0.345  0.332  1.0
  Tb  Tb4  1  0.500  0.753  0.234  1.0
  Tb  Tb5  1  0.500  0.990  0.774  1.0
  Tb  Tb6  1  0.500  0.248  0.983  1.0
  Tb  Tb7  1  0.000  0.243  0.764  1.0
  Tb  Tb8  1  0.000  0.994  0.237  1.0
  Tb  Tb9  1  0.000  0.764  0.988  1.0
  Si  Si10  1  0.500  0.969  0.399  1.0
  Si  Si11  1  0.000  0.367  0.033  1.0
  Si  Si12  1  0.000  0.599  0.374  1.0
  Si  Si13  1  0.000  0.029  0.598  1.0
  B  B14  1  0.500  0.631  0.970  1.0
  B  B15  1  0.500  0.409  0.624  1.0
  O  O16  1  0.692  0.905  0.341  1.0
  O  O17  1  0.680  0.740  0.913  1.0
  O  O18  1  0.680  0.355  0.736  1.0
  O  O19  1  0.192  0.092  0.659  1.0
  O  O20  1  0.192  0.246  0.092  1.0
  O  O21  1  0.189  0.654  0.250  1.0
  O  O22  1  0.808  0.092  0.659  1.0
  O  O23  1  0.808  0.246  0.092  1.0
  O  O24  1  0.811  0.654  0.250  1.0
  O  O25  1  0.308  0.905  0.341  1.0
  O  O26  1  0.320  0.740  0.913  1.0
  O  O27  1  0.320  0.355  0.736  1.0
  O  O28  1  0.500  0.520  0.154  1.0
  O  O29  1  0.500  0.345  0.507  1.0
  O  O30  1  0.500  0.169  0.328  1.0
  O  O31  1  0.000  0.485  0.833  1.0
  O  O32  1  0.000  0.678  0.494  1.0
  O  O33  1  0.000  0.828  0.682  1.0
  O  O34  1  0.500  0.534  0.881  1.0
  O  O35  1  0.500  0.595  0.534  1.0
  O  O36  1  0.500  0.867  0.602  1.0
  O  O37  1  0.000  0.472  0.132  1.0
  O  O38  1  0.000  0.395  0.473  1.0
  O  O39  1  0.000  0.133  0.395  1.0
  O  O40  1  0.500  0.998  0.006  1.0
  O  O41  1  0.000  0.999  0.997  1.0
[/CIF]
.
The material described by Tb5Si2BO13 crystallizes in the monoclinic Pm space group. There are eight inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 9-coordinate geometry to one O(16), one O(17), one O(18), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Tb site, Tb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(12), one O(13), one O(14), one O(15), one O(2), and one O(3) atom. In the third Tb site, Tb(3) is bonded in a 7-coordinate geometry to one O(14), one O(19), one O(7), two equivalent O(1), and two equivalent O(6) atoms. In the fourth Tb site, Tb(4) is bonded in a 6-coordinate geometry to one O(15), one O(19), two equivalent O(2), and two equivalent O(4) atoms. In the fifth Tb site, Tb(5) is bonded in a 6-coordinate geometry to one O(13), one O(19), two equivalent O(3), and two equivalent O(5) atoms. In the sixth Tb site, Tb(6) is bonded in a 7-coordinate geometry to one O(10), one O(17), one O(20), two equivalent O(3), and two equivalent O(4) atoms. In the seventh Tb site, Tb(7) is bonded in a 7-coordinate geometry to one O(11), one O(18), one O(20), two equivalent O(1), and two equivalent O(5) atoms. In the eighth Tb site, Tb(8) is bonded in a 7-coordinate geometry to one O(12), one O(16), one O(20), two equivalent O(2), and two equivalent O(6) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a tetrahedral geometry to one O(13), one O(7), and two equivalent O(2) atoms. In the second B site, B(2) is bonded in a tetrahedral geometry to one O(14), one O(8), and two equivalent O(3) atoms. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded in a tetrahedral geometry to one O(15), one O(9), and two equivalent O(1) atoms. In the second Si site, Si(2) is bonded in a tetrahedral geometry to one O(10), one O(16), and two equivalent O(5) atoms. In the third Si site, Si(3) is bonded in a tetrahedral geometry to one O(11), one O(17), and two equivalent O(6) atoms. In the fourth Si site, Si(4) is bonded in a tetrahedral geometry to one O(12), one O(18), and two equivalent O(4) atoms. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Tb(2), one Tb(3), one Tb(7), and one Si(1) atom. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Tb(2), one Tb(4), one Tb(8), and one B(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Tb(2), one Tb(5), one Tb(6), and one B(2) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Tb(1), one Tb(4), one Tb(6), and one Si(4) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one Tb(1), one Tb(5), one Tb(7), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Tb(1), one Tb(3), one Tb(8), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Tb(3), two equivalent Tb(1), and one B(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and one B(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and one Si(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Tb(6), two equivalent Tb(2), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Tb(7), two equivalent Tb(2), and one Si(3) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Tb(8), two equivalent Tb(2), and one Si(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Tb(5), two equivalent Tb(2), and one B(1) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Tb(3), two equivalent Tb(2), and one B(2) atom. In the fifteenth O site, O(15) is bonded in a distorted tetrahedral geometry to one Tb(4), two equivalent Tb(2), and one Si(1) atom. In the sixteenth O site, O(16) is bonded to one Tb(8), two equivalent Tb(1), and one Si(2) atom to form distorted edge-sharing OTb3Si tetrahedra. In the seventeenth O site, O(17) is bonded to one Tb(6), two equivalent Tb(1), and one Si(3) atom to form distorted edge-sharing OTb3Si tetrahedra. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Tb(7), two equivalent Tb(1), and one Si(4) atom. In the nineteenth O site, O(19) is bonded in a trigonal planar geometry to one Tb(3), one Tb(4), and one Tb(5) atom. In the twentieth O site, O(20) is bonded in a trigonal planar geometry to one Tb(6), one Tb(7), and one Tb(8) atom. is represented by the CIF file [CIF]
data_Tb5Si2BO13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.822
_cell_length_b   9.291
_cell_length_c   9.301
_cell_angle_alpha   60.390
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   512.539
_cell_formula_units_Z   2
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  0.740  0.345  0.332  1.0
  Tb  Tb1  1  0.260  0.654  0.678  1.0
  Tb  Tb2  1  0.740  0.654  0.678  1.0
  Tb  Tb3  1  0.260  0.345  0.332  1.0
  Tb  Tb4  1  0.500  0.753  0.234  1.0
  Tb  Tb5  1  0.500  0.990  0.774  1.0
  Tb  Tb6  1  0.500  0.248  0.983  1.0
  Tb  Tb7  1  0.000  0.243  0.764  1.0
  Tb  Tb8  1  0.000  0.994  0.237  1.0
  Tb  Tb9  1  0.000  0.764  0.988  1.0
  Si  Si10  1  0.500  0.969  0.399  1.0
  Si  Si11  1  0.000  0.367  0.033  1.0
  Si  Si12  1  0.000  0.599  0.374  1.0
  Si  Si13  1  0.000  0.029  0.598  1.0
  B  B14  1  0.500  0.631  0.970  1.0
  B  B15  1  0.500  0.409  0.624  1.0
  O  O16  1  0.692  0.905  0.341  1.0
  O  O17  1  0.680  0.740  0.913  1.0
  O  O18  1  0.680  0.355  0.736  1.0
  O  O19  1  0.192  0.092  0.659  1.0
  O  O20  1  0.192  0.246  0.092  1.0
  O  O21  1  0.189  0.654  0.250  1.0
  O  O22  1  0.808  0.092  0.659  1.0
  O  O23  1  0.808  0.246  0.092  1.0
  O  O24  1  0.811  0.654  0.250  1.0
  O  O25  1  0.308  0.905  0.341  1.0
  O  O26  1  0.320  0.740  0.913  1.0
  O  O27  1  0.320  0.355  0.736  1.0
  O  O28  1  0.500  0.520  0.154  1.0
  O  O29  1  0.500  0.345  0.507  1.0
  O  O30  1  0.500  0.169  0.328  1.0
  O  O31  1  0.000  0.485  0.833  1.0
  O  O32  1  0.000  0.678  0.494  1.0
  O  O33  1  0.000  0.828  0.682  1.0
  O  O34  1  0.500  0.534  0.881  1.0
  O  O35  1  0.500  0.595  0.534  1.0
  O  O36  1  0.500  0.867  0.602  1.0
  O  O37  1  0.000  0.472  0.132  1.0
  O  O38  1  0.000  0.395  0.473  1.0
  O  O39  1  0.000  0.133  0.395  1.0
  O  O40  1  0.500  0.998  0.006  1.0
  O  O41  1  0.000  0.999  0.997  1.0
[/CIF]
.