Wu, Y. D. and Bensch, Wolfgang (2009) K(2)Ln(2)As(2)Se(9) (Ln = Sm, Gd): The First Quaternary Rare-Earth Selenoarsenate Compounds with a 3D Framework Containing Chairlike As2Se4 Units. Inorganic Chemistry, 48 (7). pp. 2729-2731. DOI 10.1002/chin.200925021.

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Abstract

The new compounds K(2)Ln(2)As(2)Se(9) (Ln = Sm, Gd) were obtained by applying the reactive flux method, The structure consists of a three-dimensional (M) [Ln(2)As(2)Se(9)](2-) framework with K+ ion-filling tunnels running along the b axis. The two unique Ln(3+) cations are coordinated by two Se-2(2-) dumbbells, two AsSe33- pyramids, and one chairlike As2Se42- unit in a bicapped trigonal-prismatic geometry. The Ln(3+)-centered trigonal prisms share triangular faces with neighboring prisms, forming one-dimensional chains along the b axis. These chains are linked to each other to form layers by sharing Se2- anions on the capped sites of the trigonal prisms. The As2Se4 units connect these layers to form the 3D framework.

Document Type:	Article
Keywords:	highly-symmetrical compoundsf-elements electronic-structure single-crystal selenophosphates tris(bis(trimethylsilyl)amido)samarium(iii) keupse4 flux cs rb
Research affiliation:	Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence Kiel University
Refereed:	Yes
Open Access Journal?:	No
Publisher:	American Medical Association
Projects:	Future Ocean
Date Deposited:	12 Nov 2010 13:49
Last Modified:	29 Aug 2019 08:07
URI:	https://oceanrep.geomar.de/id/eprint/9849

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