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矿物晶体的种类含量及演化温度的识别,对于探究矿物晶体的演化规律及矿产资源的合理开发利用有着重要的意义。采用蒸发结晶的方法制备不同Na Cl、KCl含量配比及蒸发温度的样品,用于模拟不同组分含量和生长温度的混合晶体。利用太赫兹时域光谱系统对样品进行检测,通过分析样品的太赫兹光学参数发现,在相同生长温度下混合晶体的折射率和吸收系数都随着Na Cl质量分数的增加呈线性上升的趋势;相同组分配比的混合晶体的折射率随生长温度增加呈正弦曲线的变化趋势。结果表明太赫兹时域光谱技术可以同时表征混合晶体的组分含量和生长温度,这将为探究矿物晶体的演化规律及矿产资源的合理开发利用提供一种新的有效评价手段。
It is of great significance to explore the evolution of mineral crystals and the rational exploitation and utilization of mineral resources. The samples with different ratios of NaCl and KCl and the evaporation temperature were prepared by evaporation crystallization. The mixed crystals were used to simulate the content of different components and the growth temperature. The samples were detected by terahertz time-domain spectroscopy. By analyzing the terahertz optical parameters of the samples, it was found that the refractive index and absorption coefficient of the mixed crystals all increased linearly with the increase of NaCl mass fraction at the same growth temperature. The refractive index of mixed crystals with the same composition ratio shows a sinusoidal curve as the growth temperature increases. The results show that terahertz time-domain spectroscopy can simultaneously characterize the compositional content and growth temperature of mixed crystals, which will provide a new effective evaluation method for exploring the evolution of mineral crystals and the rational exploitation and utilization of mineral resources.