Hemimorphite,known for its pure and beautiful sky-blue color,enjoys favor a-mong consumers in the jewelry market.However,a majority of hemimorphite available for sale in the market exhibits a lighter color and lacks high quality.Considering the cur-rent research status of hemimorphite,this study conducted hydrothermal diffusion treat-ment experiments on lightly colored hemimorphite.By optimizing parameters such as so-lution ratio,experimental temperature,and treatment duration,blue-colored hemimor-phite specimens were obtained.The study subjected both pre-treated and post-treated hemimorphite experimental samples to X-ray fluorescence spectroscopy and UV-Visible absorption spectroscopy to elucidate the color change mechanism during the hydrothermal treatment of hemimorphite.The results of the research indicate that during the hydro-thermal treatment process,an ion exchange occurred between the Zn2+ions in the hemi-morphite samples and the Cu2+ions in the aqueous solution.This exchange resulted in an increase in the concentration of Cu2+ions within the hemimorphite samples,accompanied by a decrease in the concentration of Zn2+ions.The Cu2+ions generated a prominent ab-sorption peak in the red-light region,enhancing the blue hue of the hemimorphite samples and thereby achieving the objective of color improvement.Given the significant global re-serves of hemimorphite,the hydrothermal color enhancement scheme proposed in this study can be applied to poorly colored hemimorphite specimens,thereby elevating their value as mineral specimens or appreciation stones.
维普
万方数据