ELECTRONIC-STRUCTURE OF PLATINUM - A COMPTON PROFILE ANALYSIS

In this paper we report the results of a Compton profile study on poly crystalline platinum. The measurement has been made using Am-241 gamma -rays and is compared with APW calculations of Papanicolaou et al, and also with our calculations based on the renormalized-free-atom (RFA) model. It is seen that tile incorporation of electron correlation effe cts improves slightly the agreement bettween APW theory and experiment but the best fit to our experimental data is seen for the simple RFA model for 5d(9.2)6s(0.8) configuration. A comparison of the equal vale nce-electron-density Compton profiles of platinum and the other two is ogroup metals, namely palladium and nickel, reveals an interesting tre nd for the d-band width in agreement with the results based on photoem ission measurements. The d-band occupancy as determined from RFA analy sis is in agreement with Lytle's estimates.