THE S-K AND P-K POLARIZED ABSORPTION-SPECTRA OF LAYERED THIOPHOSPHATES MPS(3) (M=MN, FE, NI, ZN, MG)

The S-K and P-K polarized absorption spectra were measured on the laye red thiophosphates MPS(3) (M=Mn, Fe, Ni, Zn, Mg) single crystals with linearly polarized synchrotron radiation light source. The S-K polariz ation spectra indicate large polarization dependency especially on NiP S3. MnPS3 and FePS3 show the similar feature, while NiPS3 shows differ ent feature. No polarization dependency is observed in the spectra of MgPS3. The P-K polarized absorption spectra also exhibit a small polar ization dependency. From these spectra, the information about the p(x, y) and p(z) unoccupied states is obtained. Metal dependency is observe d especially in the S p(z) spectra. It is revealed that the S p(z) sta te is largely mixed with the d orbitals of transition metal ion. Furth ermore, we supposed that the P p states and the S p states are overlap ped each other in the transition-metal thio-phosphates.