摘要
Tourmaline is an important functional and gem material. The current study examines pink, green, and brownish-green tourmalines from Altay deposit. Based on X-ray fluorescence （XRF） quantitative analyses and ultrariolet-visible-near-infrared （UV-VIS NIR） spectral analyses in combination with annealing ex- periments, the color center of tourmaline is found to be related to the d - d transitions of ions or the d - d transitions of exchange coupled ions. Annealing crystMs treatment affects the color improvement of tourmaline
Tourmaline is an important functional and gem material. The current study examines pink, green, and brownish-green tourmalines from Altay deposit. Based on X-ray fluorescence （XRF） quantitative analyses and ultrariolet-visible-near-infrared （UV-VIS NIR） spectral analyses in combination with annealing ex- periments, the color center of tourmaline is found to be related to the d - d transitions of ions or the d - d transitions of exchange coupled ions. Annealing crystMs treatment affects the color improvement of tourmaline
