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DTA and quenching methods in the system CaO-CO_2-H_2O

Wyllie, P. J. and Raynor, E. J. (1965) DTA and quenching methods in the system CaO-CO_2-H_2O. American Mineralogist, 50 (11-12). ISSN 0003-004X. http://resolver.caltech.edu/CaltechAUTHORS:20160113-153203458

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Abstract

Harker (1964) recently described a simple technique for differential thermal analysis in closed systems containing volatile components under pressure, which promises to be of great utility. He contrasted the reaction temperatures recorded in his preliminary studies with those reported in the same systems by quenching techniques, and he noted some rather large temperature discrepancies. This led him to conclude that the accuracy of the quenching technique in systems where the liquid phase cannot be quenched to a glass "is often somewhat low and sometimes quite misleading." However, if the melting temperature of portlandite recorded by Wyllie and Tuttle (1960) is corrected as shown by Gittins and Tuttle (1964), the results obtained by DTA and quenching techniques are almost identical, and Harker's concern for the validity of the quenching technique becomes unnecessary, in this system at any rate. This note contains revised values for melting reactions in the system CaO-CO_2H_2O measured by one of us (EJR) using the quench technique, and a discussion of this technique and DTA by the other (PJW).


Item Type:Article
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http://www.minsocam.org/msa/collectors_corner/amtoc/toc1965.htmPublisherIssue Table of Contents
Alternate Title:DTA and quenching methods in the system CaO-CO2-H2O
Additional Information:© 1965 Mineralogical Society of America. Drs. R. I. Harker, D. M. Roy, and O. F. Tuttle kindly read the manuscript. The Department of Scientific and Industrial Research supported the work of E. J. Raynor at Leeds University, and the National Science Foundation Grant NSF G-19588 covered the costs of preparation of this paper.
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Department of Scientific and Industrial Research (UK)UNSPECIFIED
NSFG-19588
Record Number:CaltechAUTHORS:20160113-153203458
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160113-153203458
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ID Code:63661
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:14 Jan 2016 20:02
Last Modified:14 Jan 2016 20:02

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