Title: Pressure-induced structural transition in lanthanide pyrochlore zirconates
Authors: SURBLE SUZYHEATHMAN StephenRAISON PhilippeBOUEXIERE DanielPOPA KarinCACIUFFO Roberto
Citation: PHYSICS AND CHEMISTRY OF MINERALS vol. 37 no. 10 p. 761 - 767
Publisher: SPRINGER
Publication Year: 2010
JRC Publication N°: JRC55900
ISSN: 0342-1791
URI: http://www.springerlink.com/content/0342-1791/37/10/
http://publications.jrc.ec.europa.eu/repository/handle/JRC55900
DOI: 10.1007/s00269-010-0374-3
Type: Articles in Journals
Abstract: The structural behaviour under pressure of three lanthanide pyrochlore zirconates Ln2Zr2O7 (Ln3+ = Ce, Nd and Gd) has been investigated by x-ray diffraction up to 50 GPa. For all three compounds a symmetry reduction from cubic to monoclinic is observed under increasing pressure dependant upon a pressure value that increases with the ionic radius of the lanthanide ions, rA. The cubic and monoclinic phases coexist over a wide pressure range which increases with rA. The zero-pressure bulk modulus of the cubic phase, B0, and its pressure derivative, B0', have been determined by fitting the experimental compressibility curves to the Birch-Murnaghan equation of state.
JRC Institute:Institute for Transuranium Elements

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