Low-Temperature Specific Heat of Arsenic and Antimony

The specific heats of arsenic and antimony have been measured from 0.7 to 4.0°K and 0.5 to 4.0°K, respectively. For the electronic contributions we find 0.194±0.007 mJ/mole °${\mathrm{K}}^2$ in arsenic, and 0.112±0.005 mJ/mole °${\mathrm{K}}^2$ in antimony. Both values are in agreement with de Haas-van Alphen measurements on these semimetals. The lattice specific heat for arsenic is found to be $C_L=0.0880\mathrm{}{T}^3+0.55\mathrm{}\times {10}^{-3\mathrm{}}{T}^5$ mJ/mole °K with ${\Theta }_D\mathrm{}\left(0\right)=280.5\mathrm{}\pm 1.0°$K. For antimony $C_L=0.206\mathrm{}{T}^3+0.0033\mathrm{}{T}^5$ mJ/mole °K with ${\Theta }_D\mathrm{}\left(0\right)=211.3\mathrm{}\pm 1.5°$K.