XCV. The valency of the transition metals in some binary and ternary alloys

Summary The changes of valency of transition metal atoms in different alloy systems is considered. Reasons are given for expecting the valency to decrease as the electron concentration in the conduction band increases. Rough agreement with the experimental results of Haworth and Hume- Rothery is obtained in the cases of Mn, Fe and Co. Suggestions are made to account for the apparent fractional valency of Ni.