Temperature Dependence of the Phase Transition in Cerium

The cubic-condensed cubic transition in cerium has been observed as a function of temperature and pressure from 360°K and 11 000 atmos to 78°K and zero pressure. The data which were obtained definitely link the high pressure, room temperature and the low temperature, zero pressure transitions which have been observed previously. While the data show some unexplained features, the calculated value for the latent heat of transition at 288°K (1150±100 cal/mole) agrees as to order of magnitude with a directly measured value (880±40 cal/mole) by other workers.