Nuclear Magnetic Resonance Study of V2O5

Abstract

The quadrupole‐coupling and the chemical‐shift tensors of ⁵¹V were measured in a single crystal of V₂O₅ at room temperature. The quadrupole‐coupling constant is 805(6) kc/sec and the anisotropy factor η is 0.04(1). The chemical‐shift tensor, relative to a solution of Na₃VO₄, has principal values of −1.8(4)×10⁻⁴, +6.5(3)×10⁻⁴, and −3.0(3)×10⁻⁴. Attempts to calculate the electric‐field‐gradient tensor at the vanadium nucleus, using a point‐charge model, led to results that did not agree with experiment.