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The Structures of Na3Ln(XO4)2 Phases (Ln = Rare-Earth, X = P, V, As)

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The Rare Earths in Modern Science and Technology

Abstract

A complete and detailed structural description of sodium rare-earth orthophosphates, orthovanadates and orthoarsenates, with general formula Na3Ln(XO4)2 (Ln = rare-earth, X = P, V, As), is presented. Their structural evolution has been studied not only as a function of the Ln3+ ion size and the (XO4)3− group, but also as a function of temperature.

A number of allotropic forms have been observed for each pair Ln3+−(XO4)3−. The different structure types found during this study have been identified due to the complete structure determinations of the low temperature varieties of Na3Nd(PO4)2, Na3La(VO4)2, Na3Nd(VO4)2 and Na3Er(VO4)2, and the high temperature form of Na3Yb(PO4)2. The first four structures can be considered as derivated structures of the glaserite type, while the last one corresponds to phases having an extended non-stoichiometry and is related to the structure of NaZr2(PO4)3.

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References

  1. M. Vlasse, R. Salmon and C. Parent, Inorg. Chem. 15: 1440 (1975)

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Author information

Authors and Affiliations

  1. Laboratoire de Chimie du Solide du C.N.R.S, Université de Bordeaux I, 351, cours de la Libération, 33405, Talence Cedex, France

    Marcus Vlasse, Claude Parent, Roger Salmon & Gilles Le Flem

Authors
  1. Marcus Vlasse
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  2. Claude Parent
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  3. Roger Salmon
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  4. Gilles Le Flem
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Editor information

Editors and Affiliations

  1. North Dakota State University, Fargo, North Dakota, USA

    Gregory J. McCarthy

  2. Pennsylvania State University, University Park, Pennsylvania, USA

    Gregory J. McCarthy

  3. National Bureau of Standards, Washington, D.C., USA

    James J. Rhyne

  4. University of Texas at San Antonio, San Antonio, Texas, USA

    Herbert B. Silber

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© 1980 Plenum Press, New York

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Vlasse, M., Parent, C., Salmon, R., Le Flem, G. (1980). The Structures of Na3Ln(XO4)2 Phases (Ln = Rare-Earth, X = P, V, As). In: McCarthy, G.J., Rhyne, J.J., Silber, H.B. (eds) The Rare Earths in Modern Science and Technology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3054-7_35

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  • DOI: https://doi.org/10.1007/978-1-4613-3054-7_35

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-3056-1

  • Online ISBN: 978-1-4613-3054-7

  • eBook Packages: Springer Book Archive

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