A methodology for quantifying sodalite and cancrinite phase mixtures and the kinetics of the sodalite to cancrinite phase transformation

Barnes, Mark C., Addai-Mensah, Jonas, and Gerson, Andrea R. (1999) A methodology for quantifying sodalite and cancrinite phase mixtures and the kinetics of the sodalite to cancrinite phase transformation. Microporous and Mesoporous Materials, 31 (3). pp. 303-319.

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Abstract

A simple methodology for determining the cancrinite proportion of a sodalite and cancrinite phase mixture was developed using powder X-ray diffraction. Using this methodology to quantify phase mixtures, the kinetics of the sodalite to cancrinite phase transformation were determined. The transformation reaction leading to cancrinite formation was found to be first order with respect to the relative concentration of sodalite. Over the temperature range 160–240°C, an activation energy for this process was estimated to be 133 kJ mol−1. The techniques of 29Si MAS NMR and FTIR were both found to be unsuitable for quantifying dimorphic phase mixtures due to the ambiguity of the results they produced.

Item ID: 38190
Item Type: Article (Refereed Research - C1)
Keywords: sodalite; scale; cancrinite; phase transformation; kinetics
ISSN: 1873-3093
Funders: Comalco Aluminium, Queensland Alumina, Australian Research Council (ARC)
Date Deposited: 15 Apr 2015 05:31
FoR Codes: 03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030602 Chemical Thermodynamics and Energetics @ 30%
03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030605 Solution Chemistry @ 40%
03 CHEMICAL SCIENCES > 0306 Physical Chemistry (incl Structural) > 030603 Colloid and Surface Chemistry @ 30%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8402 Primary Mining and Extraction Processes of Mineral Resources > 840201 Mining and Extraction of Aluminium Ores @ 100%
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