The physical properties of vanadium in the temperature range 4.2-300°K

The temperature dependence of the electrical resistivity ρ, magnetic susceptibility χ, heat capacity Cp, and Hall constant R0 are studied in a vanadium single crystal. Anomalies are found in the functions ρ (T), R0(T), and Cp(T) near Ta = 195°K. It is proposed that in vanadium there exists a second order phase transition caused by ordering of an interstitial impurity (hydrogen) at T < Ta.