Materials with the spinel struture reprsent an important class of multifunctional materials, and attracted great attentions in Earth and material sciences. In the present study, the structure evolution of Fe_0.8Ni_1.8Sb_0.4O₄ (NFSO) was investigated up to ~50 GPa by using the synchrotron-based X-ray diffraction and Raman techniques. A new form of post-spinel structure was discovered in NFSO, which may possess unique properties. This study shed a light in the pressure tuning of the structure and properties of the multifunctional materials with the spinel structure.
 

Spinel,Phase transition,High pressure,Raman spectroscopy,X-ray Diffraction