High temperature vapor pressure and the critical point of potassium

High-temperature thermal properties of liquid metals, gases, and vapors. Progress report, October 1, 1972--September 30, 1973

“…The first vapor pressure and critical point study (15) was completed last year by Jerez, and provided the backbone of the K results. Subsequently, Freyland and Hensel (16) published work claiming a critical point for K about 150°F.…”