| 云南磷铝石谱学特征研究 |
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| 引用本文： | 魏中枢,狄敬如.云南磷铝石谱学特征研究[J].岩石矿物学杂志,2018,37(1):169-174. |
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| 作者姓名： | 魏中枢 狄敬如 |
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| 作者单位： | 中国地质大学(武汉)珠宝学院; |
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| 摘 要： | 使用电子探针、X射线粉晶衍射仪、傅里叶变换红外光谱仪、激光拉曼光谱仪、紫外可见分光光度计等仪器,对最近在云南发现的一种达到宝石级别的磷铝石进行了化学成分、矿物组成、红外吸收光谱、拉曼光谱、紫外可见吸收光谱等方面的研究。化学成分分析结果表明,该磷铝石的主要化学成分为P和Al,并含有少量的Fe和V;X射线粉晶衍射结果显示,该磷铝石的矿物成分主要为磷铝石,杂质较少;红外光谱与拉曼光谱分析均检出磷酸根基团的特征峰,红外光谱分析还显示有结晶水与结构水的存在;紫外可见吸收光谱在300和420 nm附近的吸收归属于Fe3+,630 nm附近较宽缓的吸收带由Fe3+和V3+共同产生。并将磷铝石与绿松石进行了谱学方面的对比分析,以便更好地区分两者。
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| 关 键 词： | 磷铝石 X射线粉晶衍射 化学成分 光谱 绿松石 |
| 收稿时间： | 2017/4/12 0:00:00 |
| 修稿时间： | 2017/9/25 0:00:00 |
Spectroscopic characteristics of natural variscite from Yunnan |
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| WEI Zhong-shu and DI Jing-ru.Spectroscopic characteristics of natural variscite from Yunnan[J].Acta Petrologica Et Mineralogica,2018,37(1):169-174. |
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| Authors: | WEI Zhong-shu and DI Jing-ru |
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| Institution: | Gemological Institute, China University of Geosciences, Wuhan 430074, China and Gemological Institute, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | Recently a new producing area of high-quality variscite has been found. The authors used such means as X-ray powder diffraction (XRD), EPMA analysis, infrared spectrometer, laser Raman spectrometer and ultra-violet-visible spectrophotometry to investigate this natural object. EPMA shows that the variscite in Yunnan is mainly composed of P and Al, and contains trace Fe and V; XRD shows that the mineral composition is very pure; the infrared spectrum and Raman spectrum show characteristic absorption band of group. FTIR also shows the existence of constitution water and crystallization water; UV spectra show that Fe3+ causes the absorption peaks around 300 nm and 420 nm whereas Fe3+ and V3+ cause the wild absorption band around 630 nm. Due to the fact that the variscite is often used as an imitation of turquoise, the authors made a comparative analysis of the spectra of the variscite and turquoise in order to distinguish the two minerals. |
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| Keywords: | variscite XRD chemical composition spectrum turquoise |
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