Compression behavior and phase transition of β-Si3N4 under high pressure
Gong Hong-xia1, Kou Zi-li1, †, Fan Cong1, Liang Hao1, Wang Qi-ming1, Zhang Lei-lei1, Peng Fang1, Yang Ming1, Ni Xiao-lin1, Liu Jing2
       

(color online) Compressibility of the normalized lattice parameters of β-Si3N4. As the pressure increases the anisotropy of β-Si3N4 becomes more and more distinct.