Abstract: A new condensed form of GaN nanocrystallite solid was synthesised by using ammonothermal reaction.The final product is semi-transparrent and with pale yellow color.The average diameter of the composed particles is 12nm.This GaN solid has a wurtzite structure.From Raman scattering of the GaN nanocrystallite solid,the red-shift of E2(high) phonon,broaden of bands and occurrence of new bands (656cm-1 and 714cm-1) were observed,which would be resulted from the nano-size effect of the solid.

Key words: A new condensed form of GaN nanocrystallite solid was synthesised by using ammonothermal reaction.The final product is semi-transparrent and with pale yellow color.The average diameter of the composed particles is 12nm.This GaN solid has a wurtzite structure.From Raman scattering of the GaN nanocrystallite solid,the red-shift of E2(high) phonon,broaden of bands and occurrence of new bands (656cm-1 and 714cm-1) were observed,which would be resulted from the nano-size effect of the solid.