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Mösbauer spectroscopic study of the decomposition mechanism of ankerite in CO2 atmosphere

Published online by Cambridge University Press:  05 July 2018

A. E. Milodowski ,
B. A. Goodman  and
D. J. Morgan
A. E. Milodowski
Affiliation:
British Geological Survey, Keyworth, Nottingham NG12 5GG
B. A. Goodman
Affiliation:
The Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB9 2QJ
D. J. Morgan
Affiliation:
British Geological Survey, Keyworth, Nottingham NG12 5GG
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Abstract

Mössbauer spectroscopy has been used to identify the iron-containing products that are formed during the thermal decomposition of ankerite in a CO2 atmosphere. The decomposition takes place in three stages and evidence is produced to show that the first stage involves decomposition of ankerite to yield a periclase-wustite solid solution, (Mg,Fe)O, along with calcite and CO2, the periclase-wustite then reacting with CO2 to produce magnesioferrite (MgFe2O4) and CO. In the second stage the magnesioferrite and calcite react to produce periclase and dicalcium ferrite. The third stage does not involve reaction of Fe-containing phases and corresponds to the decomposition of calcite to CaO.

Keywords

ankeritedecompositionMössbauer spectroscopyCO2 atmosphere
Type
Mineralogy
Information
Mineralogical Magazine , Volume 53 , Issue 372 , September 1989 , pp. 465 - 471
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1989

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