Abstract

The TiL II,III emission bands (3 d+4 s2 p transition) have been obtained from TiC 0·95 and TiN x (x=0·2 to 0·8) interstitial compounds and TiCr 2, TiCo, TiNi and TiFe intermetallic compounds. Additional peaks on the low energy side of the TiL III band from TiC and TiN x appear to be cross transitions from the 2 s and 2 p bands of the non-metal to the 2 p level of titanium. Agreement was found between the soft X-ray band spectra and the band calculations of Ern and Switendick on TiC and TiN. The soft X-ray emission spectra from TiC indicated strong admixture of the titanium 3 d and carbon 2 p bands which is in disagreement with LCAO band calculations of Lye and Logothetis. However, the 2 p band of nitrogen was shown to be below the Ti 3 d band indicating a localized state and a possible transfer of electrons from titanium to nitrogen. The TiL II,III bands from TiCr 2, TiCo, TiFe and TiNi show a progressive change with increasing electronegativity difference between titanium and the combining element indicating that there may be ionic character to the bond. No peaks were observed on the low energy side of the TiL III bands as was observed for TiC and TiN, but a distinct splitting was observed in the peak of the TiL III band from Ti 2Ni, TiNi and TiNi 3.

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