The compound described by V3CrO8 crystallizes in the monoclinic Cm space group. There are three inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(8) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one Cr(1)O6 octahedra, corners with two equivalent V(1)O6 octahedra,  an edgeedge with one V(3)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-25°. In the second V site, V(2) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and two equivalent O(1) atoms. In the third V site, V(3) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(7) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(1)O6 octahedra, corners with two equivalent V(3)O6 octahedra,  an edgeedge with one V(1)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-32°. Cr(1) is bonded to one O(5), one O(6), one O(7), one O(8), and two equivalent O(2) atoms to form CrO6 octahedra that share  a cornercorner with one V(1)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, edges with two equivalent V(1)O6 octahedra, and edges with two equivalent V(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 19-27°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one V(3) and two equivalent V(2) atoms. In the second O site, O(2) is bonded to one V(1), one V(3), and two equivalent Cr(1) atoms to form distorted OV2Cr2 trigonal pyramids that share corners with two equivalent O(2)V2Cr2 trigonal pyramids and edges with two equivalent O(7)V3Cr tetrahedra. In the third O site, O(3) is bonded in a linear geometry to one V(1) and one V(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one V(3) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one V(1), one V(2), and one Cr(1) atom. In the sixth O site, O(6) is bonded in a linear geometry to one V(2) and one Cr(1) atom. In the seventh O site, O(7) is bonded to one V(2), two equivalent V(3), and one Cr(1) atom to form OV3Cr tetrahedra that share corners with two equivalent O(7)V3Cr tetrahedra and edges with two equivalent O(2)V2Cr2 trigonal pyramids. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to two equivalent V(1) and one Cr(1) atom. is represented by the CIF file [CIF]
data_V3CrO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.387
_cell_length_b   6.387
_cell_length_c   6.472
_cell_angle_alpha   73.604
_cell_angle_beta   73.604
_cell_angle_gamma   34.902
_symmetry_Int_Tables_number   1
_cell_volume   144.319
_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
  V  V0  1  0.599  0.599  0.298  1.0
  V  V1  1  0.399  0.399  0.722  1.0
  V  V2  1  0.703  0.703  0.711  1.0
  Cr  Cr3  1  0.293  0.293  0.312  1.0
  O  O4  1  0.866  0.866  0.692  1.0
  O  O5  1  0.757  0.757  0.357  1.0
  O  O6  1  0.642  0.642  0.986  1.0
  O  O7  1  0.554  0.554  0.636  1.0
  O  O8  1  0.449  0.449  0.355  1.0
  O  O9  1  0.361  0.361  0.993  1.0
  O  O10  1  0.243  0.243  0.646  1.0
  O  O11  1  0.135  0.135  0.292  1.0
[/CIF]
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The compound described by V3CrO8 crystallizes in the monoclinic Cm space group. There are three inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(8) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one Cr(1)O6 octahedra, corners with two equivalent V(1)O6 octahedra,  an edgeedge with one V(3)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-25°. In the second V site, V(2) is bonded in a 6-coordinate geometry to one O(4), one O(5), one O(6), one O(7), and two equivalent O(1) atoms. In the third V site, V(3) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(7) atoms to form distorted VO6 octahedra that share  a cornercorner with one V(1)O6 octahedra, corners with two equivalent V(3)O6 octahedra,  an edgeedge with one V(1)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-32°. Cr(1) is bonded to one O(5), one O(6), one O(7), one O(8), and two equivalent O(2) atoms to form CrO6 octahedra that share  a cornercorner with one V(1)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, edges with two equivalent V(1)O6 octahedra, and edges with two equivalent V(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 19-27°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one V(3) and two equivalent V(2) atoms. In the second O site, O(2) is bonded to one V(1), one V(3), and two equivalent Cr(1) atoms to form distorted OV2Cr2 trigonal pyramids that share corners with two equivalent O(2)V2Cr2 trigonal pyramids and edges with two equivalent O(7)V3Cr tetrahedra. In the third O site, O(3) is bonded in a linear geometry to one V(1) and one V(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one V(3) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one V(1), one V(2), and one Cr(1) atom. In the sixth O site, O(6) is bonded in a linear geometry to one V(2) and one Cr(1) atom. In the seventh O site, O(7) is bonded to one V(2), two equivalent V(3), and one Cr(1) atom to form OV3Cr tetrahedra that share corners with two equivalent O(7)V3Cr tetrahedra and edges with two equivalent O(2)V2Cr2 trigonal pyramids. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to two equivalent V(1) and one Cr(1) atom. is represented by the CIF file [CIF]
data_V3CrO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.387
_cell_length_b   6.387
_cell_length_c   6.472
_cell_angle_alpha   73.604
_cell_angle_beta   73.604
_cell_angle_gamma   34.902
_symmetry_Int_Tables_number   1
_cell_volume   144.319
_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
  V  V0  1  0.599  0.599  0.298  1.0
  V  V1  1  0.399  0.399  0.722  1.0
  V  V2  1  0.703  0.703  0.711  1.0
  Cr  Cr3  1  0.293  0.293  0.312  1.0
  O  O4  1  0.866  0.866  0.692  1.0
  O  O5  1  0.757  0.757  0.357  1.0
  O  O6  1  0.642  0.642  0.986  1.0
  O  O7  1  0.554  0.554  0.636  1.0
  O  O8  1  0.449  0.449  0.355  1.0
  O  O9  1  0.361  0.361  0.993  1.0
  O  O10  1  0.243  0.243  0.646  1.0
  O  O11  1  0.135  0.135  0.292  1.0
[/CIF]
.