Laser-flash calorimetry IV. Heat capacity of gallium from 80 to 600 K in two solid phases and liquid phase

Abstract

The heat capacity of gallium has been measured by laser-flash calorimetry at temperatures ranging from 80 to 302 K for Ga-I (α-Ga), 210 to 254 K for β-Ga, and 250 to 600 K for liquid gallium. The results are as follows: C p (Ga-I, 298.15 K) = 26.33 J·K −1·mol −1; C p ( β-Ga, 250 K) = 27.67 J·K −1·mol −1; C p (Ga, 1,302.93 K) = 28.24 J·K −1·mol −1. The peculiarity of gallium has been discussed in terms of anharmonic heat capacity of solid phases and of the configurational entropy of the liquid phase.