The crystal structure described by Sr2V2O7 crystallizes in the triclinic P-1 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(11), one O(12), one O(14), one O(2), one O(4), one O(6), and one O(7) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(10), one O(13), one O(14), one O(2), one O(7), one O(8), one O(9), and two equivalent O(5) atoms. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to one O(10), one O(13), one O(14), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(4), one O(6), one O(7), one O(9), and two equivalent O(12) atoms. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(12), one O(7), and one O(9) atom to form corner-sharing VO4 tetrahedra. In the second V site, V(2) is bonded to one O(14), one O(3), one O(5), and one O(8) atom to form corner-sharing VO4 tetrahedra. In the third V site, V(3) is bonded to one O(10), one O(13), one O(3), and one O(4) atom to form corner-sharing VO4 tetrahedra. In the fourth V site, V(4) is bonded to one O(1), one O(11), one O(2), and one O(6) atom to form corner-sharing VO4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sr(4), and one V(4) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sr(3), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), one Sr(4), and one V(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(3), two equivalent Sr(2), and one V(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), and one V(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(4), and one V(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), and one V(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(4), and one V(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(4), and one V(3) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one V(1), and one V(4) atom. In the twelfth O site, O(12) is bonded to one Sr(1), two equivalent Sr(4), and one V(1) atom to form distorted edge-sharing OSr3V tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Sr(3), and one V(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(2) atom. is represented by the CIF file [CIF]
data_Sr2V2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.057
_cell_length_b   7.103
_cell_length_c   13.007
_cell_angle_alpha   99.308
_cell_angle_beta   93.637
_cell_angle_gamma   90.905
_symmetry_Int_Tables_number   1
_cell_volume   641.930
_cell_formula_units_Z   4
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  0.752  0.266  0.346  1.0
  Sr  Sr1  1  0.248  0.734  0.654  1.0
  Sr  Sr2  1  0.075  0.342  0.844  1.0
  Sr  Sr3  1  0.925  0.658  0.156  1.0
  Sr  Sr4  1  0.672  0.714  0.861  1.0
  Sr  Sr5  1  0.328  0.286  0.139  1.0
  Sr  Sr6  1  0.634  0.128  0.638  1.0
  Sr  Sr7  1  0.366  0.872  0.362  1.0
  V  V8  1  0.836  0.804  0.411  1.0
  V  V9  1  0.164  0.196  0.589  1.0
  V  V10  1  0.841  0.181  0.082  1.0
  V  V11  1  0.159  0.819  0.918  1.0
  V  V12  1  0.553  0.199  0.887  1.0
  V  V13  1  0.447  0.801  0.113  1.0
  V  V14  1  0.780  0.602  0.609  1.0
  V  V15  1  0.220  0.398  0.391  1.0
  O  O16  1  0.686  0.397  0.542  1.0
  O  O17  1  0.314  0.603  0.458  1.0
  O  O18  1  0.927  0.566  0.712  1.0
  O  O19  1  0.073  0.434  0.288  1.0
  O  O20  1  0.694  0.063  0.969  1.0
  O  O21  1  0.306  0.937  0.031  1.0
  O  O22  1  0.455  0.035  0.789  1.0
  O  O23  1  0.545  0.965  0.211  1.0
  O  O24  1  0.992  0.672  0.955  1.0
  O  O25  1  0.008  0.328  0.045  1.0
  O  O26  1  0.610  0.750  0.660  1.0
  O  O27  1  0.390  0.250  0.340  1.0
  O  O28  1  0.303  0.364  0.665  1.0
  O  O29  1  0.697  0.636  0.335  1.0
  O  O30  1  0.048  0.972  0.851  1.0
  O  O31  1  0.952  0.028  0.149  1.0
  O  O32  1  0.008  0.872  0.340  1.0
  O  O33  1  0.992  0.128  0.660  1.0
  O  O34  1  0.303  0.658  0.171  1.0
  O  O35  1  0.697  0.342  0.829  1.0
  O  O36  1  0.929  0.717  0.528  1.0
  O  O37  1  0.071  0.283  0.472  1.0
  O  O38  1  0.309  0.009  0.553  1.0
  O  O39  1  0.617  0.680  0.048  1.0
  O  O40  1  0.698  0.325  0.159  1.0
  O  O41  1  0.302  0.675  0.841  1.0
  O  O42  1  0.691  0.991  0.447  1.0
  O  O43  1  0.383  0.320  0.952  1.0
[/CIF]
.
The crystal structure described by Sr2V2O7 crystallizes in the triclinic P-1 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(11), one O(12), one O(14), one O(2), one O(4), one O(6), and one O(7) atom. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(10), one O(13), one O(14), one O(2), one O(7), one O(8), one O(9), and two equivalent O(5) atoms. In the third Sr site, Sr(3) is bonded in a 9-coordinate geometry to one O(10), one O(13), one O(14), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(4), one O(6), one O(7), one O(9), and two equivalent O(12) atoms. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(11), one O(12), one O(7), and one O(9) atom to form corner-sharing VO4 tetrahedra. In the second V site, V(2) is bonded to one O(14), one O(3), one O(5), and one O(8) atom to form corner-sharing VO4 tetrahedra. In the third V site, V(3) is bonded to one O(10), one O(13), one O(3), and one O(4) atom to form corner-sharing VO4 tetrahedra. In the fourth V site, V(4) is bonded to one O(1), one O(11), one O(2), and one O(6) atom to form corner-sharing VO4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Sr(1), one Sr(4), and one V(4) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sr(3), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(3), one Sr(4), and one V(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(3), two equivalent Sr(2), and one V(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(3), one Sr(4), and one V(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(4), and one V(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), and one V(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Sr(2), one Sr(4), and one V(1) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Sr(2), one Sr(3), one Sr(4), and one V(3) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one V(1), and one V(4) atom. In the twelfth O site, O(12) is bonded to one Sr(1), two equivalent Sr(4), and one V(1) atom to form distorted edge-sharing OSr3V tetrahedra. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Sr(3), and one V(3) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one V(2) atom. is represented by the CIF file [CIF]
data_Sr2V2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.057
_cell_length_b   7.103
_cell_length_c   13.007
_cell_angle_alpha   99.308
_cell_angle_beta   93.637
_cell_angle_gamma   90.905
_symmetry_Int_Tables_number   1
_cell_volume   641.930
_cell_formula_units_Z   4
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  0.752  0.266  0.346  1.0
  Sr  Sr1  1  0.248  0.734  0.654  1.0
  Sr  Sr2  1  0.075  0.342  0.844  1.0
  Sr  Sr3  1  0.925  0.658  0.156  1.0
  Sr  Sr4  1  0.672  0.714  0.861  1.0
  Sr  Sr5  1  0.328  0.286  0.139  1.0
  Sr  Sr6  1  0.634  0.128  0.638  1.0
  Sr  Sr7  1  0.366  0.872  0.362  1.0
  V  V8  1  0.836  0.804  0.411  1.0
  V  V9  1  0.164  0.196  0.589  1.0
  V  V10  1  0.841  0.181  0.082  1.0
  V  V11  1  0.159  0.819  0.918  1.0
  V  V12  1  0.553  0.199  0.887  1.0
  V  V13  1  0.447  0.801  0.113  1.0
  V  V14  1  0.780  0.602  0.609  1.0
  V  V15  1  0.220  0.398  0.391  1.0
  O  O16  1  0.686  0.397  0.542  1.0
  O  O17  1  0.314  0.603  0.458  1.0
  O  O18  1  0.927  0.566  0.712  1.0
  O  O19  1  0.073  0.434  0.288  1.0
  O  O20  1  0.694  0.063  0.969  1.0
  O  O21  1  0.306  0.937  0.031  1.0
  O  O22  1  0.455  0.035  0.789  1.0
  O  O23  1  0.545  0.965  0.211  1.0
  O  O24  1  0.992  0.672  0.955  1.0
  O  O25  1  0.008  0.328  0.045  1.0
  O  O26  1  0.610  0.750  0.660  1.0
  O  O27  1  0.390  0.250  0.340  1.0
  O  O28  1  0.303  0.364  0.665  1.0
  O  O29  1  0.697  0.636  0.335  1.0
  O  O30  1  0.048  0.972  0.851  1.0
  O  O31  1  0.952  0.028  0.149  1.0
  O  O32  1  0.008  0.872  0.340  1.0
  O  O33  1  0.992  0.128  0.660  1.0
  O  O34  1  0.303  0.658  0.171  1.0
  O  O35  1  0.697  0.342  0.829  1.0
  O  O36  1  0.929  0.717  0.528  1.0
  O  O37  1  0.071  0.283  0.472  1.0
  O  O38  1  0.309  0.009  0.553  1.0
  O  O39  1  0.617  0.680  0.048  1.0
  O  O40  1  0.698  0.325  0.159  1.0
  O  O41  1  0.302  0.675  0.841  1.0
  O  O42  1  0.691  0.991  0.447  1.0
  O  O43  1  0.383  0.320  0.952  1.0
[/CIF]
.