New nonlinear optical crystal: Tri-allylthiourea cadmium bromide

Recentty,orqarnaetatlic couptex crystals have attracted peoples in the exploration of new nonlinear optical and uLtifunctionat aateriats.This is because of their wide transparent ranqe: , Large nonlinear optical susceptibiLities, stable chemicaL and good sechanicat properties. Followinq the double group structure aodeL1,we have found and qrn a series of organometatlic complex crystals----BTCC2,TSCCC3,ATCC4.After AItC,we have discovered and grown several new crystats--Altylthiourea Cadiii(Mercury) Ihtoride or Bro.ideM[QI21HO12MItH,} 3X2, M= Cd, Hg;xCl,Br.Their poier SHG efficiencies are all largerthan that of IJrea.This paper sainty reports the growth. structure and properties of Tri-Allyithiourea Cadaii Bromide(ATtB)