Comparing Raman scattering spectrum of those two crystals with that of the non-substituted Gd_3Ga_5O_(12), obvious broadening of Raman peaks shows the disorder character of those two crystals. This disorder character differs from that of amorphes.

• 与不替代的Gd_3Ga_5O_(12)晶体的拉曼光谱相比很明显的拉曼谱线增宽表现了与非晶不同的一种无序性。