Crystal chemistry and thermodynamic properties of zircon structure-type materials

Author:

Strzelecki Andrew C.1234,Zhao Xiaodong12,Estevenon Paul5,Xu Hongwu46,Dacheux Nicolas7,Ewing Rodney C.8ORCID,Guo Xiaofeng1239ORCID

Affiliation:

1. Department of Chemistry, Washington State University, Pullman, Washington 99164, U.S.A.

2. Alexandra Navrotsky Institute for Experimental Thermodynamics, Washington State University, Pullman, Washington 99164, U.S.A.

3. Materials Science and Engineering, Washington State University, Pullman, Washington 99164, U.S.A.

4. Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.

5. CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, 30207, France

6. School of Molecular Sciences and Center for Materials of the Universe, Arizona State University, Tempe, Arizona 85287, U.S.A.

7. ICSM, University of Montpellier, CNRS, CEA, ENSCM, Site de Marcoule, Bagnols sur Ceze, 30207, France

8. Department of Earth and Planetary Sciences, Stanford University, Stanford, California 94305, U.S.A.

9. School of the Environment, Washington State University, Pullman, Washington 99164, U.S.A.

Abstract

Abstract Zircon-class ternary oxide compounds have an ideal chemical formula of ATO4, where A is commonly a lanthanide and an actinide, with T = As, P, Si, or V. Their structure (I41/amd) accommodates a diverse chemistry on both A- and T-sites, giving rise to more than 17 mineral end-members of five different mineral groups, and in excess of 45 synthetic end-members. Because of their diverse chemical and physical properties, the zircon structure-type materials are of interest to a wide variety of fields and may be used as ceramic nuclear waste forms and as aeronautical environmental barrier coatings, to name a couple. To support advancement of their applications, many studies have been dedicated to the understanding of their structural and thermodynamic properties. The emphasis in this review will be on recent advances in the structural and thermodynamic studies of zircon structure-type ceramics, including pure end-members [e.g., zircon (ZrSiO4), xenotime (YPO4)] and solid solutions [e.g., ErxTh1–x(PO4)x(SiO4)1–x]. Specifically, we provide an overview on the crystal structure, its variations and transformations in response to non-ambient stimuli (temperature, pressure, and radiation), and its correlation to thermophysical and thermochemical properties.

Publisher

Mineralogical Society of America

Subject

Geochemistry and Petrology,Geophysics

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