Vibrational Spectroscopy Characteristics of Rare Mineral Chambersite in Jixian of Tianjin, China

Chambersite (Mn₃B₇O₁₃Cl) is a type of rare mineral. The Chambersite deposit in Jixian, Tianjin is the only commercially valuable deposit in the world. The Chambersite particle in Jixian is very fine (50-300 nm), which is different from that of American Chambersite. Until now, little study was carried out has been conducted on Chinese Chambersite. In order to explore the mineralogical and material characteristics of Chambersite in Jixian, a Vibration Spectrum and high-temperature Raman Spectrum were recorded. Normal-temperature Vibration Spectrum shows that the main spectrum band assignment of Chinese Chambersite is the same as that of American Chambersite. However, as a whole, the peak position is shifted toward the high-frequency direction and the spectral width and intensity are small. High-temperature Raman Spectroscopy shows that with the increase of temperature, bands generally shift to the low frequency, the displacement distance increases first and then decreases, and the displacement distance turns at 680-687 K. The small particle size is the main reason for spectrum peak changes. High-temperature Raman Spectroscopy technique was used to test and analyze Chambersite with very fine particle size, and the relationship between the peak change and phase transition was studied, thus demonstrating that high temperature Raman Spectroscopy can be used as an effective method to study mineral phase transition.