Letter. Actinides in Geology, Energy, and the Environment: Thermally induced transformation of vorlanite to “protovorlanite”: Restoration of cation ordering in self-irradiated CaUO4

Evgeny V. Galuskin; Irina O. Galuskina; Leonid S. Dubrovinsky; Janusz Janeczek

doi:10.2138/am.2012.4092

Published by De Gruyter April 2, 2015

Letter. Actinides in Geology, Energy, and the Environment: Thermally induced transformation of vorlanite to “protovorlanite”: Restoration of cation ordering in self-irradiated CaUO₄

Evgeny V. Galuskin , Irina O. Galuskina , Leonid S. Dubrovinsky and Janusz Janeczek

From the journal American Mineralogist

https://doi.org/10.2138/am.2012.4092

Showing a limited preview of this publication:

Abstract

Vorlanite, cubic CaUO₄ heated at temperatures above 750 °C, transforms irreversibly into rhombohedral CaUO₄, proving that the latter crystallized as a precursor of vorlanite in high-temperature skarns, Vorlanite most probably originated due to pseudomorphic transformation of rhombohedral CaUO₄, caused by disordering of cations and uranyl-bonds that resulted from α-decay events of uranium. The ease of the transition from rhombohedral CaUO₄ to vorlanite and the fast reversal transition during heating can be explained by the similarity of both structures. Formation of vorlanite prevents CaUO₄ from undergoing metamictization.

Keywords: Vorlanite; rhombohedral CaUO4; radiation damage; phase transformation; Raman spectroscopy

Received: 2012-1-3

Accepted: 2012-2-18

Published Online: 2015-4-2

Published in Print: 2012-5-1

Letter. Actinides in Geology, Energy, and the Environment: Thermally induced transformation of vorlanite to “protovorlanite”: Restoration of cation ordering in self-irradiated CaUO₄

Abstract

Journal and Issue

Articles in the same Issue