The structure of selected magnesium carbonate minerals - A near infrared and mid-infrared spectroscopic study

被引：28

作者：

Frost, Ray L. ^{[1
]}

Bahfenne, Silmarilly ^{[1
]}

Graham, Jessica ^{[1
]}

Reddy, B. Jagannadha ^{[1
]}

机构：

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

来源：

POLYHEDRON | 2008年 / 27卷 / 9-10期

基金：

澳大利亚研究理事会;

关键词：

artinite; dypingite; carbonate; NIR spectroscopy; vibrational spectroscopy; OH-overtones; cation substitution effects;

D O I：

10.1016/j.poly.2008.03.019

中图分类号：

O61 [无机化学];

学科分类号：

070301 [无机化学]; 081704 [应用化学];

摘要：

The approach to remove green house gases by pumping liquid CO2 several kilometres below the ground implies that many carbonate containing minerals will be formed. Among these minerals the formation of dypingite and artinite are possible; thus necessitating a study of such minerals Two car. bonate bearing minerals dypingite and artinite with a hydrotalcite related formulae have been characterised by a combination of infrared and near-infrared spectroscopy. The infrared spectra of both minerals are characterised by CH and water stretching vibrations. Both the first and second fundamental overtones of these bands are observed in the NIR spectra in the 7030-7235 cm(-1) and 10490-10570 cm(-1). Intense (CO3)(2-) symmetric and antisymmetric stretching vibrations confirm the distortion of the carbonate anion. The position of the water bending vibration indicates water is strongly hydrogen bonded to the carbonate anion in the mineral structure. Split NIR bands at around 8675 and 11100 cm(-1) indicates that some replacement of magnesium ions by ferrous ions in the mineral structure has occurred. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2069 / 2076

页数：8

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[1]

HYDROGEN-BONDING OF ARTINITE [J].