The thermal conductivities of glassy solids, when scaled by material parameters, have a similar magnitude and temperature dependence, from the lowest temperatures yet measured, to the melt. Both empirical results and theoretical models are reviewed briefly. It is emphasized that the thermal conductivity of an amorphous solid is not understood in any temperature range.

• Received 14 April 1986

DOI:https://doi.org/10.1103/PhysRevB.34.5684