The measured thermal conductivities of large bars (30 cm. x 1.2 cm2) of single crystal zinc obey the Voigt-Thomson symmetry relation. The ratio of the conductivities perpendicular and parallel to the axis is 1.057. Since this agrees with the ratio of the similar electrical conductivities the Wiedemann-Franz ratio is the same for all directions in the crystal. This ratio agrees within 10 per cent with the value predicted by the Sommerfeld theory.
Proceedings of the Iowa Academy of Science
©1934 Iowa Academy of Science, Inc.
Cinnamon, C. A.
"Thermal Conductivity and Wiedemann-Franz Ratio for Zinc Crystals,"
Proceedings of the Iowa Academy of Science, 41(1), 253-253.
Available at: https://scholarworks.uni.edu/pias/vol41/iss1/85