Synthesis and characterisation of substituted smithsonite and calcite

Hales, Matthew Cameron (2008) Synthesis and characterisation of substituted smithsonite and calcite. Masters by Research thesis, Queensland University of Technology.

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Carbonate minerals play a very important role in nature, they represent some of the most diverse and common mineral species on the Planet. They are directly involved in the carbon dioxide (CO2) cycle acting as relatively stable long term chemical storage reservoirs, moderating both global warming trends and oceanaquatic chemistry through carbonate buffering systems. A range of synthetic metal carbonates have been synthesised for analysis under multiple experimental conditions, in order to study the variation in physical and chemical properties such as phase specificity, metal substitution, hydration/hydroxy carbonate formation under varying partial pressures of CO2 and thermal stability. Synthetic samples were characterised by a variety of instrumental analysis techniques in order to investigate chemical purity and phase specificity. Some of the techniques included, vibrational spectroscopy (IR/Raman), thermal analysis (TGA-MS) (thermal Raman), X-Ray diffraction (XRD) and electron microscopy (SEM-EDX). From the instrumental characterisation techniques, it was found that single phase smithsonite, hydrozincite, calcite and nesquehonite could successfully be synthesised under the conditions used. Minor impurities of other minerals and / or phases were found to form under specific chemical or physical conditions such as in the case of hydrozincite / simonkolleite if zinc chloride was used during hydrothermal synthesis.

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ID Code: 16643
Item Type: QUT Thesis (Masters by Research)
Keywords: Raman, Infrared, IR, spectroscopy, characterisation, synthesis, synthetic, natural, scanning electron microscopy, SEM, thermo-gravimetric analysis, mass spectroscopy, TGA-MS, X-Ray diffraction, XRD, carbonate, hydrogen carbonate, hydroxy, hydrate, minerals, crystal, point group, factor group, phase, symmetry, elements, calcite, magnesite, aragonite, vaterite, aurichalcite, azurite, malachite, hydrozincite, zincite, nesquehonite, strontianite, witherite, oxide zone, partial pressure, carbon dioxide, CO2, geological, settling, coral, geo-sequestration, green house gas
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Department: Faculty of Science
Institution: Queensland University of Technology
Copyright Owner: Copyright Matthew Cameron Hales
Deposited On: 03 Dec 2008 04:07
Last Modified: 09 Feb 2011 13:52

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