State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Engineering, Ningbo University, Ningbo, Zhejiang 315211, PR China
The new nonlinear optical crystal CsV2O5 has been synthesized by solid state reaction and characterized by single-crystal X-ray diffraction and thermogravimetric analysis. The crystal CsV2O5 crystallizes in the orthorhombic system with space Ima2 space group. It is a layered structure that is very flat and strongly parallel to c. The striking structural feature is that the V atom in single crystallographic site has two different valence states (V4+ and V5+). The [V2O5]n layer consists of corner-linked tetrahedron. The six tetrahedrons lie very nearly in the same z-plane forming almost regular hexagons. The Kurtz powder SHG measurement, using 1064 nm radiation, showed that the second-harmonic generation efficiency of CsV2O5 is about six times that of KDP.
Graphical abstract
View of the structure of CsV2O5, corner-connected VO4 triangular pyramids interspersed with layers Cs ions.
