The material structure described by Sm2V2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(5), one O(9), and two equivalent O(3) atoms. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(10), one O(13), one O(14), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the third Sm site, Sm(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(13), one O(3), one O(5), one O(6), and one O(9) atom. In the fourth Sm site, Sm(4) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(2), one O(7), and two equivalent O(8) atoms. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(12), one O(3), one O(5), and one O(6) atom to form distorted corner-sharing VO5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(14), one O(2), one O(4), one O(7), and one O(8) atom to form distorted corner-sharing VO5 trigonal bipyramids. In the third V site, V(3) is bonded to one O(10), one O(13), one O(4), and one O(5) atom to form corner-sharing VO4 tetrahedra. In the fourth V site, V(4) is bonded to one O(11), one O(12), one O(14), and one O(9) atom to form corner-sharing VO4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(3), and one V(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(4), and one V(2) atom. In the third O site, O(3) is bonded to one Sm(3), two equivalent Sm(1), and one V(1) atom to form edge-sharing OSm3V tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sm(2), one V(2), and one V(3) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sm(1), one Sm(2), one Sm(3), one V(1), and one V(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Sm(3), and one V(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sm(2), one Sm(4), and one V(2) atom. In the eighth O site, O(8) is bonded to one Sm(2), two equivalent Sm(4), and one V(2) atom to form distorted edge-sharing OSm3V tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Sm(3), and one V(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Sm(2), one Sm(4), and one V(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(3), one Sm(4), and one V(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Sm(3), one V(1), and one V(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Sm(2), one Sm(3), one Sm(4), and one V(3) atom. In the fourteenth O site, O(14) is bonded in a 1-coordinate geometry to one Sm(2), one Sm(4), one V(2), and one V(4) atom. is represented by the CIF card [CIF]
data_Sm2V2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.935
_cell_length_b   7.012
_cell_length_c   12.619
_cell_angle_alpha   99.701
_cell_angle_beta   100.556
_cell_angle_gamma   92.116
_symmetry_Int_Tables_number   1
_cell_volume   593.137
_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
  Sm  Sm0  1  0.174  0.974  0.139  1.0
  Sm  Sm1  1  0.781  0.717  0.361  1.0
  Sm  Sm2  1  0.261  0.719  0.873  1.0
  Sm  Sm3  1  0.664  0.617  0.631  1.0
  Sm  Sm4  1  0.336  0.383  0.369  1.0
  Sm  Sm5  1  0.739  0.281  0.127  1.0
  Sm  Sm6  1  0.219  0.283  0.639  1.0
  Sm  Sm7  1  0.826  0.026  0.861  1.0
  V  V8  1  0.687  0.821  0.104  1.0
  V  V9  1  0.318  0.834  0.395  1.0
  V  V10  1  0.152  0.807  0.619  1.0
  V  V11  1  0.736  0.510  0.878  1.0
  V  V12  1  0.264  0.490  0.122  1.0
  V  V13  1  0.848  0.193  0.381  1.0
  V  V14  1  0.682  0.166  0.605  1.0
  V  V15  1  0.313  0.179  0.896  1.0
  O  O16  1  0.504  0.989  0.122  1.0
  O  O17  1  0.677  0.963  0.675  1.0
  O  O18  1  0.152  0.020  0.953  1.0
  O  O19  1  0.256  0.963  0.536  1.0
  O  O20  1  0.136  0.995  0.738  1.0
  O  O21  1  0.780  0.623  0.168  1.0
  O  O22  1  0.115  0.658  0.367  1.0
  O  O23  1  0.513  0.679  0.458  1.0
  O  O24  1  0.171  0.665  0.039  1.0
  O  O25  1  0.916  0.702  0.548  1.0
  O  O26  1  0.869  0.687  0.819  1.0
  O  O27  1  0.579  0.662  0.957  1.0
  O  O28  1  0.310  0.636  0.682  1.0
  O  O29  1  0.402  0.642  0.247  1.0
  O  O30  1  0.598  0.358  0.753  1.0
  O  O31  1  0.690  0.364  0.318  1.0
  O  O32  1  0.421  0.338  0.043  1.0
  O  O33  1  0.131  0.313  0.181  1.0
  O  O34  1  0.084  0.298  0.452  1.0
  O  O35  1  0.829  0.335  0.961  1.0
  O  O36  1  0.487  0.321  0.542  1.0
  O  O37  1  0.885  0.342  0.633  1.0
  O  O38  1  0.220  0.377  0.832  1.0
  O  O39  1  0.864  0.005  0.262  1.0
  O  O40  1  0.744  0.037  0.464  1.0
  O  O41  1  0.848  0.980  0.047  1.0
  O  O42  1  0.323  0.037  0.325  1.0
  O  O43  1  0.496  0.011  0.878  1.0
[/CIF]
.
The material structure described by Sm2V2O7 crystallizes in the triclinic P-1 space group. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(2), one O(5), one O(9), and two equivalent O(3) atoms. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(10), one O(13), one O(14), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the third Sm site, Sm(3) is bonded in a 8-coordinate geometry to one O(1), one O(11), one O(12), one O(13), one O(3), one O(5), one O(6), and one O(9) atom. In the fourth Sm site, Sm(4) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(13), one O(14), one O(2), one O(7), and two equivalent O(8) atoms. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(12), one O(3), one O(5), and one O(6) atom to form distorted corner-sharing VO5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(14), one O(2), one O(4), one O(7), and one O(8) atom to form distorted corner-sharing VO5 trigonal bipyramids. In the third V site, V(3) is bonded to one O(10), one O(13), one O(4), and one O(5) atom to form corner-sharing VO4 tetrahedra. In the fourth V site, V(4) is bonded to one O(11), one O(12), one O(14), and one O(9) atom to form corner-sharing VO4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(3), and one V(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(4), and one V(2) atom. In the third O site, O(3) is bonded to one Sm(3), two equivalent Sm(1), and one V(1) atom to form edge-sharing OSm3V tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sm(2), one V(2), and one V(3) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sm(1), one Sm(2), one Sm(3), one V(1), and one V(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Sm(2), one Sm(3), and one V(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Sm(2), one Sm(4), and one V(2) atom. In the eighth O site, O(8) is bonded to one Sm(2), two equivalent Sm(4), and one V(2) atom to form distorted edge-sharing OSm3V tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sm(1), one Sm(3), and one V(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Sm(2), one Sm(4), and one V(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(3), one Sm(4), and one V(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Sm(3), one V(1), and one V(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Sm(2), one Sm(3), one Sm(4), and one V(3) atom. In the fourteenth O site, O(14) is bonded in a 1-coordinate geometry to one Sm(2), one Sm(4), one V(2), and one V(4) atom. is represented by the CIF card [CIF]
data_Sm2V2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.935
_cell_length_b   7.012
_cell_length_c   12.619
_cell_angle_alpha   99.701
_cell_angle_beta   100.556
_cell_angle_gamma   92.116
_symmetry_Int_Tables_number   1
_cell_volume   593.137
_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
  Sm  Sm0  1  0.174  0.974  0.139  1.0
  Sm  Sm1  1  0.781  0.717  0.361  1.0
  Sm  Sm2  1  0.261  0.719  0.873  1.0
  Sm  Sm3  1  0.664  0.617  0.631  1.0
  Sm  Sm4  1  0.336  0.383  0.369  1.0
  Sm  Sm5  1  0.739  0.281  0.127  1.0
  Sm  Sm6  1  0.219  0.283  0.639  1.0
  Sm  Sm7  1  0.826  0.026  0.861  1.0
  V  V8  1  0.687  0.821  0.104  1.0
  V  V9  1  0.318  0.834  0.395  1.0
  V  V10  1  0.152  0.807  0.619  1.0
  V  V11  1  0.736  0.510  0.878  1.0
  V  V12  1  0.264  0.490  0.122  1.0
  V  V13  1  0.848  0.193  0.381  1.0
  V  V14  1  0.682  0.166  0.605  1.0
  V  V15  1  0.313  0.179  0.896  1.0
  O  O16  1  0.504  0.989  0.122  1.0
  O  O17  1  0.677  0.963  0.675  1.0
  O  O18  1  0.152  0.020  0.953  1.0
  O  O19  1  0.256  0.963  0.536  1.0
  O  O20  1  0.136  0.995  0.738  1.0
  O  O21  1  0.780  0.623  0.168  1.0
  O  O22  1  0.115  0.658  0.367  1.0
  O  O23  1  0.513  0.679  0.458  1.0
  O  O24  1  0.171  0.665  0.039  1.0
  O  O25  1  0.916  0.702  0.548  1.0
  O  O26  1  0.869  0.687  0.819  1.0
  O  O27  1  0.579  0.662  0.957  1.0
  O  O28  1  0.310  0.636  0.682  1.0
  O  O29  1  0.402  0.642  0.247  1.0
  O  O30  1  0.598  0.358  0.753  1.0
  O  O31  1  0.690  0.364  0.318  1.0
  O  O32  1  0.421  0.338  0.043  1.0
  O  O33  1  0.131  0.313  0.181  1.0
  O  O34  1  0.084  0.298  0.452  1.0
  O  O35  1  0.829  0.335  0.961  1.0
  O  O36  1  0.487  0.321  0.542  1.0
  O  O37  1  0.885  0.342  0.633  1.0
  O  O38  1  0.220  0.377  0.832  1.0
  O  O39  1  0.864  0.005  0.262  1.0
  O  O40  1  0.744  0.037  0.464  1.0
  O  O41  1  0.848  0.980  0.047  1.0
  O  O42  1  0.323  0.037  0.325  1.0
  O  O43  1  0.496  0.011  0.878  1.0
[/CIF]
.