Pressure- and temperature-dependent Raman spectra of CaFeO oxygen defect perovskite.

The Raman spectra of CaFeO were investigated up to 21.8 GPa at room temperature and up to 1073 K at ambient pressure, respectively. A phase transition begins around 13.

Raman and X-ray diffraction study of pressure-induced phase transition in synthetic MgTiO.

Synthetic MgTiO qandilite was investigated to 50 and 40.4 GPa at room temperature using Raman spectroscopy and X-ray diffraction, respectively. The Raman measurements showed that cubic MgTiO spinel transforms to a high pressure tetragonal (I4/amd, No.