Syntheses, crystal structures, and NLO properties of the quaternary sulfides RE3Sb0.33SiS7 (RE=La, Pr)

The RE3Sb0.33SiS7 (RE=La, Pr), crystalling in the Ce3Al1.67S7 structure type, have been prepared. The La3Sb0.33SiS7 exhibits a SHG signal about 0.5 times that of the IR NLO material AgGaS2. 200