Abstract
The heat capacity of K3Fe(CN)6 has been measured in fields of 0, 1400, 2800, 7000, 12 000, 16 300, and 21 500 G, from 0.4 to 4 °K, along with observations of intensity of magnetization and of the course of both temperature and magnetization along isentropes. These data are presented along with values of the entropy of the salt, as a function of field and temperature, derived from them. All properties show the effects of strong antiferromagnetic interactions.