Monitoring the Process of Spodumene Phase Transition Based on Raman Spectroscopy

The high-temperature crystalline transformation of spodumene is critical for efficient lithium extraction and utilization. In this study, we employ Raman spectroscopy to investigate the phase transition behavior of spodumene under thermal treatment. The results reveal that the optimal transformation conditions for Nigerian spodumene are achieved at 1050 °C with a 30 min dwell time, as validated by X-ray diffraction (XRD). Comparative analysis demonstrates that Raman spectroscopy offers distinct advantages over XRD, including minimal sample preparation and the ability to conduct ex situ measurements of spectral changes after heat-induced phase evolution. These findings highlight the potential of Raman spectroscopy to guide process optimization in lithium extraction by precisely identifying crystallographic transformation thresholds.