Preliminary Study of Spectral Characteristics of HTHP Synthetic Jadeite
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摘要: 通过电子探针、X射线粉晶衍射、傅里叶变化红外光谱、激光拉曼光谱、紫外-可见光吸收光谱和光致发光光谱对合成翡翠矿物谱学特征及呈色机理进行系统的测试与分析。研究结果显示,合成翡翠与天然翡翠外观、矿物成分、拉曼光谱及光致发光光谱表征基本一致,但红外吸收光谱、紫外光谱以及化学成分均出现较为明显的差异,具体表现为:较低的Fe含量导致可见光区域内437 nm吸收谱带缺失;由于微量元素的含量和形成环境差异,导致红外光谱表征中ν(M/Cr-O)和νas(M-OH)伸缩振动所致的红外吸收谱带表征出与天然翡翠较大的差异。Abstract: The systematic test and analysis of the spectral characteristics and color mechanism of the synthetic jadeite are carried out by using electron probe, X-ray powder diffraction, Fourier transform infrared spectroscopy, laser Raman spectra and UV-VIS absorption spectra and photoluminescence spectra.The research results show that the appearance, mineral composition, Raman spectra, and photoluminescence spectra of the synthetic jadeite are almost the same as natural jade.However, there are obvious differences between FTIR, UV-VIS and chemical components.The specific performance is as follows:the low content of Fe leads to the loss of 437 nm absorption band in the visible range; in addition, the differences of content of trace elements and formation environment lead to large differences of infrared absorption band caused by stretching vibration of ν(M/Cr-O) and νas(M-OH).
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Key words:
- HTHP /
- synthetic jadeite /
- spectral characteristics /
- mineralogical characteristics
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表 1 合成翡翠与天然翡翠样品的化学成分
Table 1. Chemical analyses of synthetic and natural jadeite samples
(%) Sample Na2O Cr2O3 K2O MgO MnO CaO Al2O3 FeO TiO2 SiO2 Total NJ-1 13.721 0.073 0.052 0.370 0.012 0.962 22.467 1.870 0.092 59.951 99.570 SJ-2-1 15.087 0.062 0.016 0.006 0.018 0.044 24.787 0.025 0 59.478 99.523 SJ-2-2 13.847 0.064 0.028 0 0 0.063 23.826 0.015 0 62.353 100.196 SJ-2-3 13.446 0.066 0.031 0.016 0 0.064 23.962 0 0 61.090 98.675 SJ-2AVE 14.130 0.064 0.025 0.007 0.006 0.057 24.190 0.013 0 60.970 表 2 合成翡翠与天然翡翠的红外吸收光谱特征与归属
Table 2. Representation and attribution of FTIR of synthetic and natural jadeite samples
Sample No. Spectral peak/cm-1 Adscription SJ-1 3 612,3 470,3 373
1 089,1154
1 054,999,919,846
746,665
598
534,491,436,396νas(M—OH)
νas(Si—O—Si)
νas(O—Si—O)
νs(Si—O—Si)
δ(Si—O)
ν(M/Cr—O)NJ-1 3 614,3 541,3 461,3 397,3 325,3 228,3 181
1 077,1 164
959,856
745,665
582
529,467,435,399,363νas(M—OH)
νas(Si—O—Si)
νas(O—Si—O)
νs(Si—O—Si)
δ(Si—O)
ν(M/Cr, Fe—O) -
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