X-RAY PHOTOELECTRON SPECTRA OF 3d TRANSITION METAL PYRITES.

Article abstract of DOI:10.1016/0022-4596(80)90543-5

Photoelectron spectra of the synthetic compounds FeS//2, CoS//2, NiS//2, MnSe//2, CoSe//2, and NiSe//2 and of a natural crystal of MnS//2, all with the pyrite structure, are reported. The sulfur 3s and selenium 4s contributions are split into peaks for bonding and antibonding orbitals due to the covalent bonding in the molecular anion pairs. The difference in lineshape of the peaks for the bonding and antibonding orbitals is attributed to vibronic effects. The metal 2p//3/////2 spectra show the effects of multiplet splitting and satellites due to shake-up or shake-off processes. The valence band spectra consist of slightly overlapping contributions of anion p and metal 3d electrons. The metal 3d spectrum of FeS//2 has a single strong peak of width 0. 9 eV.