Layered Tetramethylammonium Vanadium Oxide [N(CH3)4]V3O7 by X‐ray Rietveld Refinement

Tetramethylammonium trivanadium heptaoxide crystallizes in the monoclinic space group P2 1 /n when prepared hydrothermally. Its structure was solved from conventional X-ray powder diffraction with final R(Bragg) = 0.052 and R(prof) 0.078. Vanadium coordination polyhedra are square pyramids and a tetrahedron which form layers parallel to the bc plane. The tetramethyl- ammonium cations are incorporated between the layers.