A study of the vapour pressure of manganese using a new high-temperature torsion - effusion apparatus

Abstract

The vapour pressure of manganese has been measured over the temperature range 1250-1550°K by means of the torsion-effusion technique. The data have been treated by the Third Law method and a value of the standard heat of sublimation (ΔH0298) of 68 095 ± 400 cal per gramme atom obtained (ΔH00 = 67 805 cal per gramme atom). Vapour pressure equations for the β, γ, δ and liquid forms of manganese have been computed.