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We report the local (NMR) and bulk (magnetization and heat capacity)properties of the vanadium-based S=1/2 uniform spin chain compoundBi6V3O16(Bi4V2O10.66). In the low-temperature {\alpha} phase, the magnetic ions(V4+) are arranged in one-dimensional chains. The magnetic susceptibility showsa broad maximum around 50 K signifying a short-range magnetic order. Heatcapacity measurements also reveal low-dimensional magnetism. The 51V magicangle spinning nuclear magnetic resonance measurements clearly show that themagnetic V4+ and nonmagnetic V5+ species are located on differentcrystallographic sites with no mixed occupation. The spin susceptibilitycalculated from the shift of the 51V NMR spectra reproduces the behaviorobserved in magnetic susceptibility and agrees well with the S=1/2 uniform spinchain model with J=113(5) K.

NMR, magnetization, and heat capacity studies of the uniform spin-1/2 chain compound Bi6V3O16