Synthesis, crystal structure and nonlinear optical property of Rb sub(3)V sub(5)O sub(14)

The new nonlinear optical crystal Rb sub(3)V sub(5)O sub(14) has been synthesized by solid state reaction and characterized by single-crystal X-ray diffraction, IR and thermogravimetric analysis. The crystal Rb sub(3)V sub(5)O sub(14) crystallizes in the trigonal system with space P31m (No. 157), a=b=8.7134(12) Aa, c=5.2807(11) Aa and alpha =90 degree , beta =90 degree , gamma =120 degree , Z=1, [rho]=3.516 g/cm super(3). It is a layered structure that is very flat and strongly parallel to c. The V sub(5)O sub(14) layer structure consists of corner-linked square and triangular pyramids. The layers are separated by Rb super(+) ions, which fit equally well on the V sub(5)O sub(14) layer. The Kurtz powder SHG measurement, using 1064 nm radiation, showed that the second-harmonic generation efficiency of Rb sub(3)V sub(5)O sub(14) is about two times that of KDP.