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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >NIR spectroscopy of jarosites
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NIR spectroscopy of jarosites

机译：黄钾铁石的近红外光谱

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Near-infrared (NIR) spectroscopy has been used to analyse a suite of synthesised jarosites of formula M-n(Fe3+)(6)(SO4)(4)(OH)(12) where M is K, Na, Ag, Pb, NH4+ and H3O+. Whilst the spectra of the jarosites show a common pattern, differences in the spectra are observed which enable the minerals to be distinguished. The NIR bands in the 6360-7000 cm(-1) region are attributed to the first fundamental overtone of the infrared and Raman hydroxyl stretching vibrations. The NIR spectrum of the ammonium-jarosite shows additional bands at 6460 and 6143 cm(-1), attributed to the first fundamental overtones of NH stretching vibrations. A set of bands are observed in the 4700-5500 cm(-1) region which are assigned to combination bands of the hydroxyl stretching and deformation vibrations. The ammonium-jarosite shows additional bands at 4730 and 4621 cm(-1), attributed to the combination of NH stretching and bending vibrations. NIR spectroscopy has the ability to distinguish between the jarosite minerals even when the formula of the minerals is closely related. The NIR spectroscopic technique has great potential as a mineral exploratory tool on planets and in particular Mars. (c) 2005 Elsevier B.V. All rights reserved.
机译：近红外（NIR）光谱已用于分析一组合成的通式为Mn（Fe3 +）（6）（SO4）（4）（OH）（12）的钾盐，其中M为K，Na，Ag，Pb，NH4 +和H3O +。虽然黄钾铁矾的光谱显示出共同的模式，但观察到光谱的差异，从而可以区分矿物。在6360-7000 cm（-1）区域中的NIR波段归因于红外和拉曼羟基拉伸振动的第一基本泛音。铵铁矾的近红外光谱显示在6460和6143 cm（-1）处的其他谱带，这归因于NH拉伸振动的第一个基本泛音。在4700-5500 cm（-1）区域中观察到一组谱带，这些谱带分配给羟基拉伸和变形振动的组合谱带。黄铁矿铵在4730和4621 cm（-1）处显示附加谱带，这归因于NH拉伸和弯曲振动的结合。即使矿物的配方密切相关，NIR光谱学也能够区分黄钾铁矾矿物。近红外光谱技术作为行星，特别是火星上的矿物探测工具具有巨大的潜力。 （c）2005 Elsevier B.V.保留所有权利。

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