High-pressure and low-temperature study of electrical resistance of lithium

The electrical-resistance behavior of Li is studied for pressures up to 410 kbar and temperatures from 300 K down to about 2 K. We found that between 220 and 320 kbar the electrical resistance of Li at low temperature exhibits a sharp drop around 7 K, suggesting a phase transition. It is suggested that Li transforms from the hcp to fcc phase near 260 kbar at low temperature.