The structure described by Na4BaTi2Si10(BO15)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(14), one O(15), one O(2), one O(4), one O(5), one O(8), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(13), one O(8), and one O(9) atom. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(11), two equivalent O(12), two equivalent O(13), two equivalent O(6), and two equivalent O(7) atoms. Ti(1) is bonded to one O(12), one O(13), one O(14), one O(15), and two equivalent O(11) atoms to form TiO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  an edgeedge with one Ti(1)O6 octahedra. B(1) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form BO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and corners with two equivalent Si(5)O4 tetrahedra. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(12), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 38°. In the second Si site, Si(2) is bonded to one O(13), one O(2), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. In the third Si site, Si(3) is bonded to one O(1), one O(14), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. In the fourth Si site, Si(4) is bonded to one O(15), one O(2), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the fifth Si site, Si(5) is bonded to one O(10), one O(3), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent B(1)O4 tetrahedra. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(1), and one Si(3) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(2), and one Si(4) atom. In the third O site, O(3) is bonded in a linear geometry to one B(1) and one Si(5) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one B(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Si(2), and one Si(5) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(1), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(2), and one Si(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one B(1), and one Si(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Si(3), and one Si(5) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Na(2), one B(1), and one Si(5) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Na(2), one Ba(1), and two equivalent Ti(1) atoms. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Na(2), one Ba(1), one Ti(1), and one Si(1) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Na(2), one Ba(1), one Ti(1), and one Si(2) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Na(1), one Ti(1), and one Si(3) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Na(1), one Ti(1), and one Si(4) atom. is represented by the CIF card [CIF]
data_BaNa4Ti2Si10(BO15)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.188
_cell_length_b   9.738
_cell_length_c   9.739
_cell_angle_alpha   119.533
_cell_angle_beta   91.924
_cell_angle_gamma   91.518
_symmetry_Int_Tables_number   1
_cell_volume   592.081
_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
  Ba  Ba0  1  0.000  0.000  0.000  1.0
  Na  Na1  1  0.512  0.271  0.714  1.0
  Na  Na2  1  0.488  0.729  0.286  1.0
  Na  Na3  1  0.507  0.702  0.702  1.0
  Na  Na4  1  0.493  0.298  0.298  1.0
  Ti  Ti5  1  0.503  0.915  0.087  1.0
  Ti  Ti6  1  0.497  0.085  0.913  1.0
  Si  Si7  1  0.807  0.621  0.926  1.0
  Si  Si8  1  0.811  0.936  0.628  1.0
  Si  Si9  1  0.193  0.379  0.074  1.0
  Si  Si10  1  0.189  0.064  0.372  1.0
  Si  Si11  1  0.234  0.590  0.925  1.0
  Si  Si12  1  0.236  0.909  0.581  1.0
  Si  Si13  1  0.766  0.410  0.075  1.0
  Si  Si14  1  0.764  0.091  0.419  1.0
  Si  Si15  1  0.800  0.589  0.426  1.0
  Si  Si16  1  0.200  0.411  0.574  1.0
  B  B17  1  0.786  0.423  0.595  1.0
  B  B18  1  0.214  0.577  0.405  1.0
  O  O19  1  0.784  0.569  0.060  1.0
  O  O20  1  0.786  0.069  0.575  1.0
  O  O21  1  0.216  0.431  0.940  1.0
  O  O22  1  0.214  0.931  0.425  1.0
  O  O23  1  0.983  0.412  0.587  1.0
  O  O24  1  0.017  0.588  0.413  1.0
  O  O25  1  0.731  0.474  0.757  1.0
  O  O26  1  0.731  0.766  0.479  1.0
  O  O27  1  0.269  0.526  0.243  1.0
  O  O28  1  0.269  0.234  0.521  1.0
  O  O29  1  0.032  0.665  0.930  1.0
  O  O30  1  0.034  0.926  0.661  1.0
  O  O31  1  0.968  0.335  0.070  1.0
  O  O32  1  0.966  0.074  0.339  1.0
  O  O33  1  0.690  0.268  0.485  1.0
  O  O34  1  0.692  0.473  0.254  1.0
  O  O35  1  0.310  0.732  0.515  1.0
  O  O36  1  0.308  0.527  0.746  1.0
  O  O37  1  0.722  0.539  0.549  1.0
  O  O38  1  0.278  0.461  0.451  1.0
  O  O39  1  0.372  0.907  0.907  1.0
  O  O40  1  0.628  0.093  0.093  1.0
  O  O41  1  0.709  0.782  0.966  1.0
  O  O42  1  0.713  0.968  0.785  1.0
  O  O43  1  0.291  0.218  0.034  1.0
  O  O44  1  0.287  0.032  0.215  1.0
  O  O45  1  0.379  0.717  0.054  1.0
  O  O46  1  0.381  0.041  0.709  1.0
  O  O47  1  0.621  0.283  0.946  1.0
  O  O48  1  0.619  0.959  0.291  1.0
[/CIF]
.
The structure described by Na4BaTi2Si10(BO15)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(14), one O(15), one O(2), one O(4), one O(5), one O(8), and one O(9) atom. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(13), one O(8), and one O(9) atom. Ba(1) is bonded in a distorted q6 geometry to two equivalent O(11), two equivalent O(12), two equivalent O(13), two equivalent O(6), and two equivalent O(7) atoms. Ti(1) is bonded to one O(12), one O(13), one O(14), one O(15), and two equivalent O(11) atoms to form TiO6 octahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  an edgeedge with one Ti(1)O6 octahedra. B(1) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form BO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and corners with two equivalent Si(5)O4 tetrahedra. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(12), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 38°. In the second Si site, Si(2) is bonded to one O(13), one O(2), one O(5), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. In the third Si site, Si(3) is bonded to one O(1), one O(14), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Si(5)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. In the fourth Si site, Si(4) is bonded to one O(15), one O(2), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one B(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. In the fifth Si site, Si(5) is bonded to one O(10), one O(3), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, and corners with two equivalent B(1)O4 tetrahedra. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(1), and one Si(3) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Si(2), and one Si(4) atom. In the third O site, O(3) is bonded in a linear geometry to one B(1) and one Si(5) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one B(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Si(2), and one Si(5) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(1), and one Si(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Ba(1), one Si(2), and one Si(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one B(1), and one Si(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Si(3), and one Si(5) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Na(2), one B(1), and one Si(5) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Na(2), one Ba(1), and two equivalent Ti(1) atoms. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Na(2), one Ba(1), one Ti(1), and one Si(1) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Na(2), one Ba(1), one Ti(1), and one Si(2) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Na(1), one Ti(1), and one Si(3) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Na(1), one Ti(1), and one Si(4) atom. is represented by the CIF card [CIF]
data_BaNa4Ti2Si10(BO15)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.188
_cell_length_b   9.738
_cell_length_c   9.739
_cell_angle_alpha   119.533
_cell_angle_beta   91.924
_cell_angle_gamma   91.518
_symmetry_Int_Tables_number   1
_cell_volume   592.081
_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
  Ba  Ba0  1  0.000  0.000  0.000  1.0
  Na  Na1  1  0.512  0.271  0.714  1.0
  Na  Na2  1  0.488  0.729  0.286  1.0
  Na  Na3  1  0.507  0.702  0.702  1.0
  Na  Na4  1  0.493  0.298  0.298  1.0
  Ti  Ti5  1  0.503  0.915  0.087  1.0
  Ti  Ti6  1  0.497  0.085  0.913  1.0
  Si  Si7  1  0.807  0.621  0.926  1.0
  Si  Si8  1  0.811  0.936  0.628  1.0
  Si  Si9  1  0.193  0.379  0.074  1.0
  Si  Si10  1  0.189  0.064  0.372  1.0
  Si  Si11  1  0.234  0.590  0.925  1.0
  Si  Si12  1  0.236  0.909  0.581  1.0
  Si  Si13  1  0.766  0.410  0.075  1.0
  Si  Si14  1  0.764  0.091  0.419  1.0
  Si  Si15  1  0.800  0.589  0.426  1.0
  Si  Si16  1  0.200  0.411  0.574  1.0
  B  B17  1  0.786  0.423  0.595  1.0
  B  B18  1  0.214  0.577  0.405  1.0
  O  O19  1  0.784  0.569  0.060  1.0
  O  O20  1  0.786  0.069  0.575  1.0
  O  O21  1  0.216  0.431  0.940  1.0
  O  O22  1  0.214  0.931  0.425  1.0
  O  O23  1  0.983  0.412  0.587  1.0
  O  O24  1  0.017  0.588  0.413  1.0
  O  O25  1  0.731  0.474  0.757  1.0
  O  O26  1  0.731  0.766  0.479  1.0
  O  O27  1  0.269  0.526  0.243  1.0
  O  O28  1  0.269  0.234  0.521  1.0
  O  O29  1  0.032  0.665  0.930  1.0
  O  O30  1  0.034  0.926  0.661  1.0
  O  O31  1  0.968  0.335  0.070  1.0
  O  O32  1  0.966  0.074  0.339  1.0
  O  O33  1  0.690  0.268  0.485  1.0
  O  O34  1  0.692  0.473  0.254  1.0
  O  O35  1  0.310  0.732  0.515  1.0
  O  O36  1  0.308  0.527  0.746  1.0
  O  O37  1  0.722  0.539  0.549  1.0
  O  O38  1  0.278  0.461  0.451  1.0
  O  O39  1  0.372  0.907  0.907  1.0
  O  O40  1  0.628  0.093  0.093  1.0
  O  O41  1  0.709  0.782  0.966  1.0
  O  O42  1  0.713  0.968  0.785  1.0
  O  O43  1  0.291  0.218  0.034  1.0
  O  O44  1  0.287  0.032  0.215  1.0
  O  O45  1  0.379  0.717  0.054  1.0
  O  O46  1  0.381  0.041  0.709  1.0
  O  O47  1  0.621  0.283  0.946  1.0
  O  O48  1  0.619  0.959  0.291  1.0
[/CIF]
.