Near-infrared spectroscopy of natural alunites

被引：10

作者：

Frost, Ray L. ^{[1
]}

Wain, Daria L. ^{[1
]}

机构：

[1] Queensland Univ Technol, Sch Phys & Chem Sci, Inorgan Mat Res Program, Brisbane, Qld 4001, Australia

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2008年 / 71卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

Alunite; Natroalunite; Ammonioalunite; Jarosite; Infrared and near-infrared spectroscopy; Sulphate;

D O I：

10.1016/j.saa.2007.11.029

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Near-infrared spectroscopy (NIR) has been used to analyse alunites of formula K(Al3+)(6)(SO4)(4)(OH)(12). Whilst the spectra of the alunites shows a common pattern differences in the spectra are observed which enable the minerals to be distinguished. These differences are attributed to subtle variations in alunite composition. The NIR bands in the 6300-7000 cm(-1) region are attributed to the first fundamental overtone of both the infrared and Raman hydroxyl 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. NIR spectroscopy has the ability to distinguish between the alunite 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) 2008 Elsevier B.V. All rights reserved.

引用

页码：490 / 495

页数：6

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