CHARACTERISATION OF THE DEHYDRATION OF AUSTRALIAN SEDIMENTARY AND VOLCANIC PRECIOUS OPAL BY THERMAL METHODS

Australian precious opals derived from two geologically distinct environments, denoted as volcanic and sedimentary, have been characterised by thermogravimetric (TG) and thermomechanical (TMA) analysis. Significant differences were observed in the dehydration behaviour and are related to the charact...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2008-04, Vol.92 (1), p.91-95
Main Authors: SMALLWOOD, A. G, THOMAS, P. S, RAY, A. S
Format: Article
Language:English
Subjects:
Crystalline rocks
Earth sciences
Earth, ocean, space
Exact sciences and technology
Igneous and metamorphic rocks petrology, volcanic processes, magmas
Mineralogy
Silicates
Online Access:Get full text
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Summary:Australian precious opals derived from two geologically distinct environments, denoted as volcanic and sedimentary, have been characterised by thermogravimetric (TG) and thermomechanical (TMA) analysis. Significant differences were observed in the dehydration behaviour and are related to the character of the water and the morphology of the opal specimens.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-007-8742-z