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Recrystallization of metamict allanite

Published online by Cambridge University Press:  05 July 2018

T. Beirau ,
C. Paulmann  and
U. Bismayer
T. Beirau*
Affiliation:
Department of Earth Sciences, University of Hamburg, Grindelallee 48, 20146 Hamburg, Germany
C. Paulmann
Affiliation:
Department of Earth Sciences, University of Hamburg, Grindelallee 48, 20146 Hamburg, Germany
U. Bismayer
Affiliation:
Department of Earth Sciences, University of Hamburg, Grindelallee 48, 20146 Hamburg, Germany
*
*E-mail: tobias.beirau@mineralogie.uni-hamburg.de
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Abstract

Allanite is a common accessory mineral in igneous rocks. Allanite becomes metamict over geological time-scales as a result of the α-decay of radioactive elements in the crystal structure. This study focuses on the recrystallization of metamict allanite from Savvushka, Russia. The structural recovery produced by annealing was investigated by X-ray powder diffraction, single-crystal synchrotron X-ray diffraction and infrared spectroscopy. A kinetic analysis is presented that shows that the recrystallization process proceeds by at least two different mechanisms.

Keywords

allanitemetamictX-ray diffractionsynchrotron diffractionrecrystallization
Type
Research Article
Information
Mineralogical Magazine , Volume 75 , Issue 4 , August 2011 , pp. 2393 - 2399
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2011

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