Synthesis and characterization of lanthanide orthothiophosphates: LaPS4

The single crystal structure of LaPS4, (1), is reported. The space group is tetragonal, I4(1)/acd. Unit cell dimensions are a = 10.9641(3) Å and c = 19.4828(9) Å. The far infrared absorption and Raman spectra (100–600 cm−1) are consistent with the PS43- groups being in a distorted tetrahedral geometry. The room temperature emission spectrum of LaPS4 doped with Er3+ is also presented. Emission peaks at 529, 534, 549, and 554 nm were observed when the sample was excited at 492 nm. The compound reported here is isomorphous and isostructural to several other lanthanide orthothiophosphates.

The lanthanide orthothiophosphate LaPS4 has been prepared and characterized. It is isomorphous and isostructural to several other lanthanide orthothiophosphates. The Raman and infrared spectra are compared with the Raman shown to be the preferred method of analysis. In addition to being prepared pure, the title compound was also prepared with an Er3+ doping. The room temperature luminescence spectrum of this material is consistent with Er3+ substituting for La3+.Figure optionsDownload as PowerPoint slide