Structure evolution of Bi4O7 under high pressure

What is it about?

Attempts to obtain pure Bi(V) oxide, Bi2O5, were not successful to date. An oxide that at least partly contains Bi(V), Bi4O7, was investigated with regard to its stability at high pressures up to 30 GPa. With the help of in situ P-XRD and Raman spectroscopy under high pressure, changes in compressibility, phase transitions and finally amorphisation can be detected.

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Photo by SOULSANA on Unsplash

Photo by SOULSANA on Unsplash

Why is it important?

Mixed-valent compounds, including Bi(III/V) oxides, are catalytically active. For a precise understanding of the reactions that take place, an exact knowledge of the structural conditions as well as their possible changes with variation of the physical reaction conditions such as pressure and temperature is necessary.