Vapor pressures of platinum, iridium, and rhodium

Abstract

The vapor pressures of platinum, iridium, and rhodium h ave been measured using a microbalance t echnique based on the Langmuir method. Heats of sublimation at 298 oK were calculated with the aid of free energy functions. The least square lines for the vapor pressure data, the heats of sublimation, and the normal boiling points obtained were as follows: