The structure described by Ba2Sr3Nb10O30 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(1), one O(21), one O(23), two equivalent O(11), two equivalent O(17), and two equivalent O(29) atoms. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(14), two equivalent O(15), and two equivalent O(28) atoms. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(22), one O(24), two equivalent O(12), two equivalent O(18), and two equivalent O(30) atoms. In the second Sr site, Sr(2) is bonded to one O(19), one O(20), one O(23), one O(24), two equivalent O(3), two equivalent O(4), two equivalent O(7), and two equivalent O(8) atoms to form SrO12 cuboctahedra that share faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, faces with two equivalent Nb(5)O6 octahedra, and faces with two equivalent Nb(6)O6 octahedra. In the third Sr site, Sr(3) is bonded to one O(21), one O(22), one O(25), one O(26), two equivalent O(10), two equivalent O(5), two equivalent O(6), and two equivalent O(9) atoms to form SrO12 cuboctahedra that share faces with two equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Nb(3)O6 octahedra, faces with two equivalent Nb(4)O6 octahedra, faces with two equivalent Nb(7)O6 octahedra, and faces with two equivalent Nb(8)O6 octahedra. There are ten inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(11), one O(27), one O(3), one O(7), and two equivalent O(19) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(5)O6 octahedra,  a cornercorner with one Nb(6)O6 octahedra,  a cornercorner with one Nb(8)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-37°. In the second Nb site, Nb(2) is bonded to one O(12), one O(28), one O(4), one O(8), and two equivalent O(20) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(5)O6 octahedra,  a cornercorner with one Nb(6)O6 octahedra,  a cornercorner with one Nb(7)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-39°. In the third Nb site, Nb(3) is bonded to one O(10), one O(13), one O(29), one O(5), and two equivalent O(21) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(5)O6 octahedra,  a cornercorner with one Nb(7)O6 octahedra,  a cornercorner with one Nb(8)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-42°. In the fourth Nb site, Nb(4) is bonded to one O(14), one O(30), one O(6), one O(9), and two equivalent O(22) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(6)O6 octahedra,  a cornercorner with one Nb(7)O6 octahedra,  a cornercorner with one Nb(8)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 6-47°. In the fifth Nb site, Nb(5) is bonded to one O(15), one O(29), one O(4), one O(7), and two equivalent O(23) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Nb(5)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-42°. In the sixth Nb site, Nb(6) is bonded to one O(16), one O(3), one O(30), one O(8), and two equivalent O(24) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Nb(4)O6 octahedra, corners with two equivalent Nb(6)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-47°. In the seventh Nb site, Nb(7) is bonded to one O(17), one O(28), one O(5), one O(9), and two equivalent O(25) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra,  a cornercorner with one Nb(4)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(7)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-39°. In the eighth Nb site, Nb(8) is bonded to one O(10), one O(18), one O(27), one O(6), and two equivalent O(26) atoms to form distorted NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra,  a cornercorner with one Nb(4)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(8)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-42°. In the ninth Nb site, Nb(9) is bonded to one O(11), one O(12), one O(17), one O(18), and two equivalent O(1) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 1-42°. In the tenth Nb site, Nb(10) is bonded to one O(13), one O(14), one O(15), one O(16), and two equivalent O(2) atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 11-38°. There are thirty inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ba(1), one Sr(1), and two equivalent Nb(9) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ba(2) and two equivalent Nb(10) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(2), one Nb(1), and one Nb(6) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Sr(2), one Nb(2), and one Nb(5) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Sr(3), one Nb(3), and one Nb(7) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Sr(3), one Nb(4), and one Nb(8) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to two equivalent Sr(2), one Nb(1), and one Nb(5) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to two equivalent Sr(2), one Nb(2), and one Nb(6) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to two equivalent Sr(3), one Nb(4), and one Nb(7) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(3), one Nb(3), and one Nb(8) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to two equivalent Ba(1), one Nb(1), and one Nb(9) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Nb(2), and one Nb(9) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Nb(10) and one Nb(3) atom. In the fourteenth O site, O(14) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ba(2), one Nb(10), and one Nb(4) atom. In the fifteenth O site, O(15) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ba(2), one Nb(10), and one Nb(5) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Nb(10) and one Nb(6) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to two equivalent Ba(1), one Nb(7), and one Nb(9) atom. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(1), one Nb(8), and one Nb(9) atom. In the nineteenth O site, O(19) is bonded in a 3-coordinate geometry to one Sr(2) and two equivalent Nb(1) atoms. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one Sr(2) and two equivalent Nb(2) atoms. In the twenty-first O site, O(21) is bonded in a 2-coordinate geometry to one Ba(1), one Sr(3), and two equivalent Nb(3) atoms. In the twenty-second O site, O(22) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(3), and two equivalent Nb(4) atoms. In the twenty-third O site, O(23) is bonded in a 2-coordinate geometry to one Ba(1), one Sr(2), and two equivalent Nb(5) atoms. In the twenty-fourth O site, O(24) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), and two equivalent Nb(6) atoms. In the twenty-fifth O site, O(25) is bonded in a 2-coordinate geometry to one Sr(3) and two equivalent Nb(7) atoms. In the twenty-sixth O site, O(26) is bonded in a distorted T-shaped geometry to one Sr(3) and two equivalent Nb(8) atoms. In the twenty-seventh O site, O(27) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(8) atom. In the twenty-eighth O site, O(28) is bonded to two equivalent Ba(2), one Nb(2), and one Nb(7) atom to form distorted corner-sharing OBa2Nb2 trigonal pyramids. In the twenty-ninth O site, O(29) is bonded to two equivalent Ba(1), one Nb(3), and one Nb(5) atom to form distorted corner-sharing OBa2Nb2 trigonal pyramids. In the thirtieth O site, O(30) is bonded to two equivalent Sr(1), one Nb(4), and one Nb(6) atom to form distorted corner-sharing OSr2Nb2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2Sr3Nb10O30
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.065
_cell_length_b   12.699
_cell_length_c   12.701
_cell_angle_alpha   90.131
_cell_angle_beta   90.017
_cell_angle_gamma   90.054
_symmetry_Int_Tables_number   1
_cell_volume   655.604
_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  0.499  0.670  0.827  1.0
  Ba  Ba1  1  0.499  0.832  0.332  1.0
  Sr  Sr2  1  0.513  0.327  0.171  1.0
  Sr  Sr3  1  0.502  0.501  0.501  1.0
  Sr  Sr4  1  0.501  0.001  0.001  1.0
  Nb  Nb5  1  0.017  0.419  0.710  1.0
  Nb  Nb6  1  0.011  0.575  0.288  1.0
  Nb  Nb7  1  0.014  0.927  0.787  1.0
  Nb  Nb8  1  0.010  0.080  0.212  1.0
  Nb  Nb9  1  0.009  0.713  0.577  1.0
  Nb  Nb10  1  0.015  0.289  0.425  1.0
  Nb  Nb11  1  0.010  0.789  0.076  1.0
  Nb  Nb12  1  0.018  0.211  0.920  1.0
  Nb  Nb13  1  0.021  0.496  1.000  1.0
  Nb  Nb14  1  0.029  0.004  0.503  1.0
  O  O15  1  0.478  0.497  0.001  1.0
  O  O16  1  0.478  0.993  0.493  1.0
  O  O17  1  0.973  0.368  0.561  1.0
  O  O18  1  0.970  0.638  0.434  1.0
  O  O19  1  0.970  0.858  0.936  1.0
  O  O20  1  0.969  0.135  0.067  1.0
  O  O21  1  0.970  0.568  0.639  1.0
  O  O22  1  0.968  0.438  0.362  1.0
  O  O23  1  0.971  0.934  0.139  1.0
  O  O24  1  0.972  0.061  0.869  1.0
  O  O25  1  0.972  0.505  0.843  1.0
  O  O26  1  0.968  0.489  0.158  1.0
  O  O27  1  0.972  0.996  0.655  1.0
  O  O28  1  0.973  0.995  0.341  1.0
  O  O29  1  0.974  0.842  0.493  1.0
  O  O30  1  0.972  0.156  0.494  1.0
  O  O31  1  0.972  0.654  0.996  1.0
  O  O32  1  0.968  0.339  0.011  1.0
  O  O33  1  0.474  0.429  0.701  1.0
  O  O34  1  0.475  0.580  0.297  1.0
  O  O35  1  0.474  0.916  0.803  1.0
  O  O36  1  0.475  0.082  0.203  1.0
  O  O37  1  0.475  0.703  0.579  1.0
  O  O38  1  0.474  0.302  0.413  1.0
  O  O39  1  0.475  0.798  0.081  1.0
  O  O40  1  0.474  0.201  0.929  1.0
  O  O41  1  0.975  0.288  0.789  1.0
  O  O42  1  0.975  0.719  0.220  1.0
  O  O43  1  0.977  0.779  0.721  1.0
  O  O44  1  0.976  0.228  0.272  1.0
[/CIF]
.
The structure described by Ba2Sr3Nb10O30 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 9-coordinate geometry to one O(1), one O(21), one O(23), two equivalent O(11), two equivalent O(17), and two equivalent O(29) atoms. In the second Ba site, Ba(2) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(14), two equivalent O(15), and two equivalent O(28) atoms. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(22), one O(24), two equivalent O(12), two equivalent O(18), and two equivalent O(30) atoms. In the second Sr site, Sr(2) is bonded to one O(19), one O(20), one O(23), one O(24), two equivalent O(3), two equivalent O(4), two equivalent O(7), and two equivalent O(8) atoms to form SrO12 cuboctahedra that share faces with two equivalent Sr(2)O12 cuboctahedra, faces with two equivalent Nb(1)O6 octahedra, faces with two equivalent Nb(2)O6 octahedra, faces with two equivalent Nb(5)O6 octahedra, and faces with two equivalent Nb(6)O6 octahedra. In the third Sr site, Sr(3) is bonded to one O(21), one O(22), one O(25), one O(26), two equivalent O(10), two equivalent O(5), two equivalent O(6), and two equivalent O(9) atoms to form SrO12 cuboctahedra that share faces with two equivalent Sr(3)O12 cuboctahedra, faces with two equivalent Nb(3)O6 octahedra, faces with two equivalent Nb(4)O6 octahedra, faces with two equivalent Nb(7)O6 octahedra, and faces with two equivalent Nb(8)O6 octahedra. There are ten inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(11), one O(27), one O(3), one O(7), and two equivalent O(19) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(5)O6 octahedra,  a cornercorner with one Nb(6)O6 octahedra,  a cornercorner with one Nb(8)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(1)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-37°. In the second Nb site, Nb(2) is bonded to one O(12), one O(28), one O(4), one O(8), and two equivalent O(20) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(5)O6 octahedra,  a cornercorner with one Nb(6)O6 octahedra,  a cornercorner with one Nb(7)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(2)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-39°. In the third Nb site, Nb(3) is bonded to one O(10), one O(13), one O(29), one O(5), and two equivalent O(21) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(5)O6 octahedra,  a cornercorner with one Nb(7)O6 octahedra,  a cornercorner with one Nb(8)O6 octahedra, corners with two equivalent Nb(3)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-42°. In the fourth Nb site, Nb(4) is bonded to one O(14), one O(30), one O(6), one O(9), and two equivalent O(22) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(6)O6 octahedra,  a cornercorner with one Nb(7)O6 octahedra,  a cornercorner with one Nb(8)O6 octahedra, corners with two equivalent Nb(4)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 6-47°. In the fifth Nb site, Nb(5) is bonded to one O(15), one O(29), one O(4), one O(7), and two equivalent O(23) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra, corners with two equivalent Nb(5)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-42°. In the sixth Nb site, Nb(6) is bonded to one O(16), one O(3), one O(30), one O(8), and two equivalent O(24) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(10)O6 octahedra,  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Nb(4)O6 octahedra, corners with two equivalent Nb(6)O6 octahedra, and faces with two equivalent Sr(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-47°. In the seventh Nb site, Nb(7) is bonded to one O(17), one O(28), one O(5), one O(9), and two equivalent O(25) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(2)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra,  a cornercorner with one Nb(4)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(7)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 7-39°. In the eighth Nb site, Nb(8) is bonded to one O(10), one O(18), one O(27), one O(6), and two equivalent O(26) atoms to form distorted NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra,  a cornercorner with one Nb(3)O6 octahedra,  a cornercorner with one Nb(4)O6 octahedra,  a cornercorner with one Nb(9)O6 octahedra, corners with two equivalent Nb(8)O6 octahedra, and faces with two equivalent Sr(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-42°. In the ninth Nb site, Nb(9) is bonded to one O(11), one O(12), one O(17), one O(18), and two equivalent O(1) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 1-42°. In the tenth Nb site, Nb(10) is bonded to one O(13), one O(14), one O(15), one O(16), and two equivalent O(2) atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 11-38°. There are thirty inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Ba(1), one Sr(1), and two equivalent Nb(9) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ba(2) and two equivalent Nb(10) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(2), one Nb(1), and one Nb(6) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent Sr(2), one Nb(2), and one Nb(5) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Sr(3), one Nb(3), and one Nb(7) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Sr(3), one Nb(4), and one Nb(8) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to two equivalent Sr(2), one Nb(1), and one Nb(5) atom. In the eighth O site, O(8) is bonded in a 2-coordinate geometry to two equivalent Sr(2), one Nb(2), and one Nb(6) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to two equivalent Sr(3), one Nb(4), and one Nb(7) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(3), one Nb(3), and one Nb(8) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to two equivalent Ba(1), one Nb(1), and one Nb(9) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Nb(2), and one Nb(9) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one Nb(10) and one Nb(3) atom. In the fourteenth O site, O(14) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ba(2), one Nb(10), and one Nb(4) atom. In the fifteenth O site, O(15) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ba(2), one Nb(10), and one Nb(5) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Nb(10) and one Nb(6) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to two equivalent Ba(1), one Nb(7), and one Nb(9) atom. In the eighteenth O site, O(18) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(1), one Nb(8), and one Nb(9) atom. In the nineteenth O site, O(19) is bonded in a 3-coordinate geometry to one Sr(2) and two equivalent Nb(1) atoms. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one Sr(2) and two equivalent Nb(2) atoms. In the twenty-first O site, O(21) is bonded in a 2-coordinate geometry to one Ba(1), one Sr(3), and two equivalent Nb(3) atoms. In the twenty-second O site, O(22) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(3), and two equivalent Nb(4) atoms. In the twenty-third O site, O(23) is bonded in a 2-coordinate geometry to one Ba(1), one Sr(2), and two equivalent Nb(5) atoms. In the twenty-fourth O site, O(24) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), and two equivalent Nb(6) atoms. In the twenty-fifth O site, O(25) is bonded in a 2-coordinate geometry to one Sr(3) and two equivalent Nb(7) atoms. In the twenty-sixth O site, O(26) is bonded in a distorted T-shaped geometry to one Sr(3) and two equivalent Nb(8) atoms. In the twenty-seventh O site, O(27) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(8) atom. In the twenty-eighth O site, O(28) is bonded to two equivalent Ba(2), one Nb(2), and one Nb(7) atom to form distorted corner-sharing OBa2Nb2 trigonal pyramids. In the twenty-ninth O site, O(29) is bonded to two equivalent Ba(1), one Nb(3), and one Nb(5) atom to form distorted corner-sharing OBa2Nb2 trigonal pyramids. In the thirtieth O site, O(30) is bonded to two equivalent Sr(1), one Nb(4), and one Nb(6) atom to form distorted corner-sharing OSr2Nb2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2Sr3Nb10O30
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.065
_cell_length_b   12.699
_cell_length_c   12.701
_cell_angle_alpha   90.131
_cell_angle_beta   90.017
_cell_angle_gamma   90.054
_symmetry_Int_Tables_number   1
_cell_volume   655.604
_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  0.499  0.670  0.827  1.0
  Ba  Ba1  1  0.499  0.832  0.332  1.0
  Sr  Sr2  1  0.513  0.327  0.171  1.0
  Sr  Sr3  1  0.502  0.501  0.501  1.0
  Sr  Sr4  1  0.501  0.001  0.001  1.0
  Nb  Nb5  1  0.017  0.419  0.710  1.0
  Nb  Nb6  1  0.011  0.575  0.288  1.0
  Nb  Nb7  1  0.014  0.927  0.787  1.0
  Nb  Nb8  1  0.010  0.080  0.212  1.0
  Nb  Nb9  1  0.009  0.713  0.577  1.0
  Nb  Nb10  1  0.015  0.289  0.425  1.0
  Nb  Nb11  1  0.010  0.789  0.076  1.0
  Nb  Nb12  1  0.018  0.211  0.920  1.0
  Nb  Nb13  1  0.021  0.496  1.000  1.0
  Nb  Nb14  1  0.029  0.004  0.503  1.0
  O  O15  1  0.478  0.497  0.001  1.0
  O  O16  1  0.478  0.993  0.493  1.0
  O  O17  1  0.973  0.368  0.561  1.0
  O  O18  1  0.970  0.638  0.434  1.0
  O  O19  1  0.970  0.858  0.936  1.0
  O  O20  1  0.969  0.135  0.067  1.0
  O  O21  1  0.970  0.568  0.639  1.0
  O  O22  1  0.968  0.438  0.362  1.0
  O  O23  1  0.971  0.934  0.139  1.0
  O  O24  1  0.972  0.061  0.869  1.0
  O  O25  1  0.972  0.505  0.843  1.0
  O  O26  1  0.968  0.489  0.158  1.0
  O  O27  1  0.972  0.996  0.655  1.0
  O  O28  1  0.973  0.995  0.341  1.0
  O  O29  1  0.974  0.842  0.493  1.0
  O  O30  1  0.972  0.156  0.494  1.0
  O  O31  1  0.972  0.654  0.996  1.0
  O  O32  1  0.968  0.339  0.011  1.0
  O  O33  1  0.474  0.429  0.701  1.0
  O  O34  1  0.475  0.580  0.297  1.0
  O  O35  1  0.474  0.916  0.803  1.0
  O  O36  1  0.475  0.082  0.203  1.0
  O  O37  1  0.475  0.703  0.579  1.0
  O  O38  1  0.474  0.302  0.413  1.0
  O  O39  1  0.475  0.798  0.081  1.0
  O  O40  1  0.474  0.201  0.929  1.0
  O  O41  1  0.975  0.288  0.789  1.0
  O  O42  1  0.975  0.719  0.220  1.0
  O  O43  1  0.977  0.779  0.721  1.0
  O  O44  1  0.976  0.228  0.272  1.0
[/CIF]
.