Heat Capacity of Terbium from 15 to 350°K

Abstract

The heat capacity of terbium has been measured in the temperature range 15 to 350°K. A lambda anomaly has been observed with the peak at 227.7°K. There is, in addition, an anomalous region near 220°K. The heat capacity in this region depends on the thermal history of the sample. The value of the entropy at 273.16°K is 17.50 cal/ (g atom-deg) in agreement with the value predicted on the assumption that at room temperature the 4f electrons have the same configuration as in the free tripositive ion.