The material structure described by SrB8O15 crystallizes in the monoclinic P2_1 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(10), one O(14), one O(15), one O(2), one O(3), one O(4), one O(6), one O(7), and one O(9) atom. There are eight inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(5), one O(8), and one O(9) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(15), one O(4), and one O(7) atom. In the third B site, B(3) is bonded to one O(1), one O(10), one O(5), and one O(7) atom to form corner-sharing BO4 tetrahedra. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(10), one O(2), and one O(3) atom. In the fifth B site, B(5) is bonded to one O(1), one O(11), one O(2), and one O(3) atom to form corner-sharing BO4 tetrahedra. In the sixth B site, B(6) is bonded to one O(1), one O(12), one O(15), and one O(4) atom to form corner-sharing BO4 tetrahedra. In the seventh B site, B(7) is bonded in a trigonal planar geometry to one O(14), one O(6), and one O(8) atom. In the eighth B site, B(8) is bonded in a trigonal planar geometry to one O(11), one O(12), and one O(13) atom. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one B(3), one B(5), and one B(6) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(4), and one B(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(4), and one B(5) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(6) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one B(1) and one B(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(1) and one B(7) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one B(1) and one B(7) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one B(1) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(3), and one B(4) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one B(5) and one B(8) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one B(6) and one B(8) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one B(8) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Sr(1) and one B(7) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(6) atom. is represented by the CIF card [CIF]
data_SrB8O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.336
_cell_length_b   7.675
_cell_length_c   10.045
_cell_angle_alpha   70.575
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   606.137
_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
  Sr  Sr0  1  0.599  0.893  0.273  1.0
  Sr  Sr1  1  0.099  0.107  0.727  1.0
  B  B2  1  0.104  0.605  0.473  1.0
  B  B3  1  0.604  0.395  0.527  1.0
  B  B4  1  0.942  0.965  0.025  1.0
  B  B5  1  0.442  0.035  0.975  1.0
  B  B6  1  0.991  0.883  0.282  1.0
  B  B7  1  0.491  0.117  0.718  1.0
  B  B8  1  0.932  0.992  0.483  1.0
  B  B9  1  0.432  0.008  0.517  1.0
  B  B10  1  0.692  0.891  0.648  1.0
  B  B11  1  0.192  0.109  0.352  1.0
  B  B12  1  0.693  0.898  0.910  1.0
  B  B13  1  0.193  0.102  0.090  1.0
  B  B14  1  0.097  0.611  0.725  1.0
  B  B15  1  0.597  0.389  0.275  1.0
  B  B16  1  0.698  0.602  0.858  1.0
  B  B17  1  0.198  0.398  0.142  1.0
  O  O18  1  0.621  0.967  0.760  1.0
  O  O19  1  0.121  0.033  0.240  1.0
  O  O20  1  0.579  0.920  0.531  1.0
  O  O21  1  0.079  0.080  0.469  1.0
  O  O22  1  0.845  0.988  0.600  1.0
  O  O23  1  0.345  0.012  0.400  1.0
  O  O24  1  0.591  0.953  0.005  1.0
  O  O25  1  0.091  0.047  0.995  1.0
  O  O26  1  0.070  0.702  0.338  1.0
  O  O27  1  0.570  0.298  0.662  1.0
  O  O28  1  0.582  0.576  0.223  1.0
  O  O29  1  0.082  0.424  0.777  1.0
  O  O30  1  0.890  0.892  0.161  1.0
  O  O31  1  0.390  0.108  0.839  1.0
  O  O32  1  0.113  0.689  0.578  1.0
  O  O33  1  0.613  0.311  0.422  1.0
  O  O34  1  0.640  0.578  0.473  1.0
  O  O35  1  0.140  0.422  0.527  1.0
  O  O36  1  0.881  0.919  0.384  1.0
  O  O37  1  0.381  0.081  0.616  1.0
  O  O38  1  0.720  0.693  0.716  1.0
  O  O39  1  0.220  0.307  0.284  1.0
  O  O40  1  0.702  0.695  0.954  1.0
  O  O41  1  0.202  0.305  0.046  1.0
  O  O42  1  0.174  0.585  0.095  1.0
  O  O43  1  0.674  0.415  0.905  1.0
  O  O44  1  0.096  0.731  0.798  1.0
  O  O45  1  0.596  0.269  0.202  1.0
  O  O46  1  0.854  0.972  0.908  1.0
  O  O47  1  0.354  0.028  0.092  1.0
[/CIF]
.
The material structure described by SrB8O15 crystallizes in the monoclinic P2_1 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(10), one O(14), one O(15), one O(2), one O(3), one O(4), one O(6), one O(7), and one O(9) atom. There are eight inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(5), one O(8), and one O(9) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(15), one O(4), and one O(7) atom. In the third B site, B(3) is bonded to one O(1), one O(10), one O(5), and one O(7) atom to form corner-sharing BO4 tetrahedra. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(10), one O(2), and one O(3) atom. In the fifth B site, B(5) is bonded to one O(1), one O(11), one O(2), and one O(3) atom to form corner-sharing BO4 tetrahedra. In the sixth B site, B(6) is bonded to one O(1), one O(12), one O(15), and one O(4) atom to form corner-sharing BO4 tetrahedra. In the seventh B site, B(7) is bonded in a trigonal planar geometry to one O(14), one O(6), and one O(8) atom. In the eighth B site, B(8) is bonded in a trigonal planar geometry to one O(11), one O(12), and one O(13) atom. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one B(3), one B(5), and one B(6) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(4), and one B(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(4), and one B(5) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(6) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one B(1) and one B(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(1) and one B(7) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(3) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one B(1) and one B(7) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Sr(1) and one B(1) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(3), and one B(4) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one B(5) and one B(8) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one B(6) and one B(8) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one B(8) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Sr(1) and one B(7) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(6) atom. is represented by the CIF card [CIF]
data_SrB8O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.336
_cell_length_b   7.675
_cell_length_c   10.045
_cell_angle_alpha   70.575
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   606.137
_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
  Sr  Sr0  1  0.599  0.893  0.273  1.0
  Sr  Sr1  1  0.099  0.107  0.727  1.0
  B  B2  1  0.104  0.605  0.473  1.0
  B  B3  1  0.604  0.395  0.527  1.0
  B  B4  1  0.942  0.965  0.025  1.0
  B  B5  1  0.442  0.035  0.975  1.0
  B  B6  1  0.991  0.883  0.282  1.0
  B  B7  1  0.491  0.117  0.718  1.0
  B  B8  1  0.932  0.992  0.483  1.0
  B  B9  1  0.432  0.008  0.517  1.0
  B  B10  1  0.692  0.891  0.648  1.0
  B  B11  1  0.192  0.109  0.352  1.0
  B  B12  1  0.693  0.898  0.910  1.0
  B  B13  1  0.193  0.102  0.090  1.0
  B  B14  1  0.097  0.611  0.725  1.0
  B  B15  1  0.597  0.389  0.275  1.0
  B  B16  1  0.698  0.602  0.858  1.0
  B  B17  1  0.198  0.398  0.142  1.0
  O  O18  1  0.621  0.967  0.760  1.0
  O  O19  1  0.121  0.033  0.240  1.0
  O  O20  1  0.579  0.920  0.531  1.0
  O  O21  1  0.079  0.080  0.469  1.0
  O  O22  1  0.845  0.988  0.600  1.0
  O  O23  1  0.345  0.012  0.400  1.0
  O  O24  1  0.591  0.953  0.005  1.0
  O  O25  1  0.091  0.047  0.995  1.0
  O  O26  1  0.070  0.702  0.338  1.0
  O  O27  1  0.570  0.298  0.662  1.0
  O  O28  1  0.582  0.576  0.223  1.0
  O  O29  1  0.082  0.424  0.777  1.0
  O  O30  1  0.890  0.892  0.161  1.0
  O  O31  1  0.390  0.108  0.839  1.0
  O  O32  1  0.113  0.689  0.578  1.0
  O  O33  1  0.613  0.311  0.422  1.0
  O  O34  1  0.640  0.578  0.473  1.0
  O  O35  1  0.140  0.422  0.527  1.0
  O  O36  1  0.881  0.919  0.384  1.0
  O  O37  1  0.381  0.081  0.616  1.0
  O  O38  1  0.720  0.693  0.716  1.0
  O  O39  1  0.220  0.307  0.284  1.0
  O  O40  1  0.702  0.695  0.954  1.0
  O  O41  1  0.202  0.305  0.046  1.0
  O  O42  1  0.174  0.585  0.095  1.0
  O  O43  1  0.674  0.415  0.905  1.0
  O  O44  1  0.096  0.731  0.798  1.0
  O  O45  1  0.596  0.269  0.202  1.0
  O  O46  1  0.854  0.972  0.908  1.0
  O  O47  1  0.354  0.028  0.092  1.0
[/CIF]
.