The compound described by Sr2V3O9 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(12), one O(13), one O(15), one O(2), one O(3), and one O(5) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(14), one O(16), one O(18), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the third Sr site, Sr(3) 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(18), one O(3), and one O(5) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(14), one O(16), one O(17), one O(18), one O(4), one O(6), one O(7), and one O(9) atom. There are six inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(17), one O(4), and one O(5) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-47°. In the second V site, V(2) is bonded to one O(10), one O(12), one O(16), and one O(6) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 50-58°. In the third V site, V(3) is bonded to one O(10), one O(11), one O(15), one O(4), one O(8), and one O(9) atom to form distorted VO6 octahedra that share corners with two equivalent V(5)O6 octahedra,  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, and  a cornercorner with one V(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-37°. In the fourth V site, V(4) is bonded to one O(13), one O(3), one O(7), and one O(9) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-58°. In the fifth V site, V(5) is bonded to one O(11), one O(12), one O(17), one O(2), one O(7), and one O(8) atom to form distorted VO6 octahedra that share corners with two equivalent V(3)O6 octahedra,  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, and  a cornercorner with one V(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-37°. In the sixth V site, V(6) is bonded to one O(14), one O(15), one O(18), and one O(2) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-47°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one V(5), and one V(6) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), and one V(4) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sr(4), one V(1), and one V(3) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(4), and one V(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one V(4), and one V(5) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(2), one V(3), and one V(5) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one V(3), and one V(4) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one V(2), and one V(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(3), one V(3), and one V(5) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one V(2), and one V(5) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), and one V(4) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(4), and one V(6) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one Sr(1), one V(3), and one V(6) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(4), and one V(2) atom. In the seventeenth O site, O(17) is bonded in a 2-coordinate geometry to one Sr(4), one V(1), and one V(5) atom. In the eighteenth O site, O(18) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(4), and one V(6) atom. is represented by the CIF card [CIF]
data_Sr2V3O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.962
_cell_length_b   7.293
_cell_length_c   8.966
_cell_angle_alpha   103.560
_cell_angle_beta   102.137
_cell_angle_gamma   115.953
_symmetry_Int_Tables_number   1
_cell_volume   371.564
_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  0.120  0.875  0.749  1.0
  Sr  Sr1  1  0.298  0.551  0.097  1.0
  Sr  Sr2  1  0.701  0.453  0.903  1.0
  Sr  Sr3  1  0.876  0.121  0.251  1.0
  V  V4  1  0.090  0.341  0.680  1.0
  V  V5  1  0.669  0.921  0.842  1.0
  V  V6  1  0.495  0.527  0.490  1.0
  V  V7  1  0.330  0.081  0.158  1.0
  V  V8  1  0.505  0.036  0.510  1.0
  V  V9  1  0.911  0.659  0.320  1.0
  O  O10  1  0.043  0.519  0.805  1.0
  O  O11  1  0.170  0.894  0.448  1.0
  O  O12  1  0.075  0.856  0.038  1.0
  O  O13  1  0.219  0.442  0.548  1.0
  O  O14  1  0.265  0.289  0.804  1.0
  O  O15  1  0.538  0.819  0.965  1.0
  O  O16  1  0.488  0.000  0.280  1.0
  O  O17  1  0.470  0.715  0.426  1.0
  O  O18  1  0.292  0.283  0.277  1.0
  O  O19  1  0.703  0.717  0.721  1.0
  O  O20  1  0.543  0.288  0.574  1.0
  O  O21  1  0.508  0.001  0.721  1.0
  O  O22  1  0.463  0.182  0.036  1.0
  O  O23  1  0.736  0.708  0.194  1.0
  O  O24  1  0.778  0.558  0.450  1.0
  O  O25  1  0.925  0.145  0.961  1.0
  O  O26  1  0.828  0.108  0.554  1.0
  O  O27  1  0.961  0.481  0.198  1.0
[/CIF]
.
The compound described by Sr2V3O9 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(12), one O(13), one O(15), one O(2), one O(3), and one O(5) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(14), one O(16), one O(18), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the third Sr site, Sr(3) 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(18), one O(3), and one O(5) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(14), one O(16), one O(17), one O(18), one O(4), one O(6), one O(7), and one O(9) atom. There are six inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(17), one O(4), and one O(5) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-47°. In the second V site, V(2) is bonded to one O(10), one O(12), one O(16), and one O(6) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 50-58°. In the third V site, V(3) is bonded to one O(10), one O(11), one O(15), one O(4), one O(8), and one O(9) atom to form distorted VO6 octahedra that share corners with two equivalent V(5)O6 octahedra,  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, and  a cornercorner with one V(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-37°. In the fourth V site, V(4) is bonded to one O(13), one O(3), one O(7), and one O(9) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-58°. In the fifth V site, V(5) is bonded to one O(11), one O(12), one O(17), one O(2), one O(7), and one O(8) atom to form distorted VO6 octahedra that share corners with two equivalent V(3)O6 octahedra,  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, and  a cornercorner with one V(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-37°. In the sixth V site, V(6) is bonded to one O(14), one O(15), one O(18), and one O(2) atom to form corner-sharing VO4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-47°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one V(5), and one V(6) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), and one V(4) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sr(4), one V(1), and one V(3) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(4), and one V(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one V(4), and one V(5) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(2), one V(3), and one V(5) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(2), one Sr(4), one V(3), and one V(4) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one V(2), and one V(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(3), one V(3), and one V(5) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one V(2), and one V(5) atom. In the thirteenth O site, O(13) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), and one V(4) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(4), and one V(6) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one Sr(1), one V(3), and one V(6) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(4), and one V(2) atom. In the seventeenth O site, O(17) is bonded in a 2-coordinate geometry to one Sr(4), one V(1), and one V(5) atom. In the eighteenth O site, O(18) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(4), and one V(6) atom. is represented by the CIF card [CIF]
data_Sr2V3O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.962
_cell_length_b   7.293
_cell_length_c   8.966
_cell_angle_alpha   103.560
_cell_angle_beta   102.137
_cell_angle_gamma   115.953
_symmetry_Int_Tables_number   1
_cell_volume   371.564
_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  0.120  0.875  0.749  1.0
  Sr  Sr1  1  0.298  0.551  0.097  1.0
  Sr  Sr2  1  0.701  0.453  0.903  1.0
  Sr  Sr3  1  0.876  0.121  0.251  1.0
  V  V4  1  0.090  0.341  0.680  1.0
  V  V5  1  0.669  0.921  0.842  1.0
  V  V6  1  0.495  0.527  0.490  1.0
  V  V7  1  0.330  0.081  0.158  1.0
  V  V8  1  0.505  0.036  0.510  1.0
  V  V9  1  0.911  0.659  0.320  1.0
  O  O10  1  0.043  0.519  0.805  1.0
  O  O11  1  0.170  0.894  0.448  1.0
  O  O12  1  0.075  0.856  0.038  1.0
  O  O13  1  0.219  0.442  0.548  1.0
  O  O14  1  0.265  0.289  0.804  1.0
  O  O15  1  0.538  0.819  0.965  1.0
  O  O16  1  0.488  0.000  0.280  1.0
  O  O17  1  0.470  0.715  0.426  1.0
  O  O18  1  0.292  0.283  0.277  1.0
  O  O19  1  0.703  0.717  0.721  1.0
  O  O20  1  0.543  0.288  0.574  1.0
  O  O21  1  0.508  0.001  0.721  1.0
  O  O22  1  0.463  0.182  0.036  1.0
  O  O23  1  0.736  0.708  0.194  1.0
  O  O24  1  0.778  0.558  0.450  1.0
  O  O25  1  0.925  0.145  0.961  1.0
  O  O26  1  0.828  0.108  0.554  1.0
  O  O27  1  0.961  0.481  0.198  1.0
[/CIF]
.