The compound described by H2V3O8 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), and three equivalent O(1) atoms. In the second V site, V(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(6), and two equivalent O(3) atoms. In the third V site, V(3) is bonded in a 5-coordinate geometry to one O(4), one O(8), and three equivalent O(7) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(5) and one O(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(3) atom. In the second O site, O(5) is bonded in a bent 150 degrees geometry to one V(2) and one H(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one V(2), one H(1), and one H(2) atom. In the fourth O site, O(7) is bonded in a distorted T-shaped geometry to three equivalent V(3) atoms. In the fifth O site, O(8) is bonded in a single-bond geometry to one V(3) atom. In the sixth O site, O(1) is bonded to one V(2) and three equivalent V(1) atoms to form a mixture of distorted edge and corner-sharing OV4 trigonal pyramids. In the seventh O site, O(2) is bonded in a single-bond geometry to one V(1) atom. In the eighth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one V(1) and two equivalent V(2) atoms. is represented by the CIF card [CIF]
data_V3(HO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.348
_cell_length_b   3.724
_cell_length_c   17.027
_cell_angle_alpha   88.507
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   592.548
_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
  V  V0  1  0.377  0.251  0.453  1.0
  V  V1  1  0.123  0.251  0.953  1.0
  V  V2  1  0.623  0.749  0.547  1.0
  V  V3  1  0.877  0.749  0.047  1.0
  V  V4  1  0.441  0.228  0.655  1.0
  V  V5  1  0.059  0.228  0.155  1.0
  V  V6  1  0.559  0.772  0.345  1.0
  V  V7  1  0.941  0.772  0.845  1.0
  V  V8  1  0.407  0.250  0.050  1.0
  V  V9  1  0.093  0.250  0.550  1.0
  V  V10  1  0.593  0.750  0.950  1.0
  V  V11  1  0.907  0.750  0.450  1.0
  H  H12  1  0.222  0.016  0.747  1.0
  H  H13  1  0.278  0.016  0.247  1.0
  H  H14  1  0.778  0.984  0.253  1.0
  H  H15  1  0.722  0.984  0.753  1.0
  H  H16  1  0.620  0.445  0.747  1.0
  H  H17  1  0.880  0.445  0.247  1.0
  H  H18  1  0.380  0.555  0.253  1.0
  H  H19  1  0.120  0.555  0.753  1.0
  O  O20  1  0.571  0.244  0.544  1.0
  O  O21  1  0.929  0.244  0.044  1.0
  O  O22  1  0.429  0.756  0.456  1.0
  O  O23  1  0.071  0.756  0.956  1.0
  O  O24  1  0.226  0.257  0.405  1.0
  O  O25  1  0.274  0.257  0.905  1.0
  O  O26  1  0.774  0.743  0.595  1.0
  O  O27  1  0.726  0.743  0.095  1.0
  O  O28  1  0.520  0.270  0.372  1.0
  O  O29  1  0.980  0.270  0.872  1.0
  O  O30  1  0.480  0.730  0.628  1.0
  O  O31  1  0.020  0.730  0.128  1.0
  O  O32  1  0.291  0.248  0.556  1.0
  O  O33  1  0.209  0.248  0.056  1.0
  O  O34  1  0.709  0.752  0.444  1.0
  O  O35  1  0.791  0.752  0.944  1.0
  O  O36  1  0.301  0.182  0.720  1.0
  O  O37  1  0.199  0.182  0.220  1.0
  O  O38  1  0.699  0.818  0.280  1.0
  O  O39  1  0.801  0.818  0.780  1.0
  O  O40  1  0.607  0.217  0.721  1.0
  O  O41  1  0.893  0.217  0.221  1.0
  O  O42  1  0.393  0.783  0.279  1.0
  O  O43  1  0.107  0.783  0.779  1.0
  O  O44  1  0.575  0.250  0.979  1.0
  O  O45  1  0.925  0.250  0.479  1.0
  O  O46  1  0.425  0.750  0.021  1.0
  O  O47  1  0.075  0.750  0.521  1.0
  O  O48  1  0.461  0.248  0.139  1.0
  O  O49  1  0.039  0.248  0.639  1.0
  O  O50  1  0.539  0.752  0.861  1.0
  O  O51  1  0.961  0.752  0.361  1.0
[/CIF]
.
The compound described by H2V3O8 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent V sites. In the first V site, V(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), and three equivalent O(1) atoms. In the second V site, V(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(6), and two equivalent O(3) atoms. In the third V site, V(3) is bonded in a 5-coordinate geometry to one O(4), one O(8), and three equivalent O(7) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(5) and one O(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(3) atom. In the second O site, O(5) is bonded in a bent 150 degrees geometry to one V(2) and one H(1) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one V(2), one H(1), and one H(2) atom. In the fourth O site, O(7) is bonded in a distorted T-shaped geometry to three equivalent V(3) atoms. In the fifth O site, O(8) is bonded in a single-bond geometry to one V(3) atom. In the sixth O site, O(1) is bonded to one V(2) and three equivalent V(1) atoms to form a mixture of distorted edge and corner-sharing OV4 trigonal pyramids. In the seventh O site, O(2) is bonded in a single-bond geometry to one V(1) atom. In the eighth O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one V(1) and two equivalent V(2) atoms. is represented by the CIF card [CIF]
data_V3(HO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.348
_cell_length_b   3.724
_cell_length_c   17.027
_cell_angle_alpha   88.507
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   592.548
_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
  V  V0  1  0.377  0.251  0.453  1.0
  V  V1  1  0.123  0.251  0.953  1.0
  V  V2  1  0.623  0.749  0.547  1.0
  V  V3  1  0.877  0.749  0.047  1.0
  V  V4  1  0.441  0.228  0.655  1.0
  V  V5  1  0.059  0.228  0.155  1.0
  V  V6  1  0.559  0.772  0.345  1.0
  V  V7  1  0.941  0.772  0.845  1.0
  V  V8  1  0.407  0.250  0.050  1.0
  V  V9  1  0.093  0.250  0.550  1.0
  V  V10  1  0.593  0.750  0.950  1.0
  V  V11  1  0.907  0.750  0.450  1.0
  H  H12  1  0.222  0.016  0.747  1.0
  H  H13  1  0.278  0.016  0.247  1.0
  H  H14  1  0.778  0.984  0.253  1.0
  H  H15  1  0.722  0.984  0.753  1.0
  H  H16  1  0.620  0.445  0.747  1.0
  H  H17  1  0.880  0.445  0.247  1.0
  H  H18  1  0.380  0.555  0.253  1.0
  H  H19  1  0.120  0.555  0.753  1.0
  O  O20  1  0.571  0.244  0.544  1.0
  O  O21  1  0.929  0.244  0.044  1.0
  O  O22  1  0.429  0.756  0.456  1.0
  O  O23  1  0.071  0.756  0.956  1.0
  O  O24  1  0.226  0.257  0.405  1.0
  O  O25  1  0.274  0.257  0.905  1.0
  O  O26  1  0.774  0.743  0.595  1.0
  O  O27  1  0.726  0.743  0.095  1.0
  O  O28  1  0.520  0.270  0.372  1.0
  O  O29  1  0.980  0.270  0.872  1.0
  O  O30  1  0.480  0.730  0.628  1.0
  O  O31  1  0.020  0.730  0.128  1.0
  O  O32  1  0.291  0.248  0.556  1.0
  O  O33  1  0.209  0.248  0.056  1.0
  O  O34  1  0.709  0.752  0.444  1.0
  O  O35  1  0.791  0.752  0.944  1.0
  O  O36  1  0.301  0.182  0.720  1.0
  O  O37  1  0.199  0.182  0.220  1.0
  O  O38  1  0.699  0.818  0.280  1.0
  O  O39  1  0.801  0.818  0.780  1.0
  O  O40  1  0.607  0.217  0.721  1.0
  O  O41  1  0.893  0.217  0.221  1.0
  O  O42  1  0.393  0.783  0.279  1.0
  O  O43  1  0.107  0.783  0.779  1.0
  O  O44  1  0.575  0.250  0.979  1.0
  O  O45  1  0.925  0.250  0.479  1.0
  O  O46  1  0.425  0.750  0.021  1.0
  O  O47  1  0.075  0.750  0.521  1.0
  O  O48  1  0.461  0.248  0.139  1.0
  O  O49  1  0.039  0.248  0.639  1.0
  O  O50  1  0.539  0.752  0.861  1.0
  O  O51  1  0.961  0.752  0.361  1.0
[/CIF]
.