The enhanced V-51 NMR in Al2O3 and [C(NH2)(3)]Al(SO4)(2)center dot 6H(2)O have been studied. Both systems are Van Vleck paramagnets. Analysis of enhanced (51) V NMRand V3+ ESR data allowed us to estimate vanadium nuclear quadrupole frequencies and hyperfine interaction constant B for V-51(3+) ions in corundum for the first time.