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Licensed Unlicensed Requires Authentication Published by De Gruyter (O) May 3, 2011

High-pressure synthesis of rare-earth metal disulfidesand diselenides LnX2 (Ln = Sm, Gd, Tb, Dy, Ho, Er and Tm; X = S, Se)

Carola J. Müller, Thomas Doert and Ulrich Schwarz

Abstract

A series of rare-earth metal disulfides LnS2 and diselenides LnSe2 (Ln = Sm, Gd, Tb, Dy, Ho, Er and Tm has been prepared by high-pressure high-temperature synthesis at 8(1) GPa. The dichalcogenides LnX2 (X = S, Se) are found to crystallize in the α-LaS2 type with the monoclinic space group P121/a1 (no. 14). The crystal structure is a twofold superstructure of the ZrSSi aristotype and consists of puckered cationic [LnX]+ double slabs which are sandwiched by planar chalcogen sheets containing X22– dumbbells.


* Correspondence address: Technische Universität Dresden, Fachrichtung Chemie und Lebensmittelchemie, Helmholtzstr. 10, 01069 Dresden, Deutschland,

Published Online: 2011-05-03
Published in Print: 2011-08

© by Oldenbourg Wissenschaftsverlag, Dresden, Germany

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