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Open-Framework Cadmium Oxalates with Channels Stabilized by Alkali Metal Ions

✍ Scribed by R. Vaidhyanathan; Srinivasan Natarajan; C.N.R. Rao

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 404 KB
Volume: 162
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.2001.9186

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✦ Synopsis

Two new cadmium oxalates, M 4 Cd 2 (C 2 O 4 ) 4 ' 4H 2 O, M ‫؍‬ Na(I) and K (II) with open architectures have been synthesized hydrothermally. The Cd atoms have the unusual eightcoordination with respect to the oxalate oxygens. The connectivity between the Cd and oxalate units forms layers with 12membered apertures (six Cd and six oxalate units), with the layers interpenetrating to give rise to three-dimensional structures possessing 8-membered channels (four Cd and four oxalate units), wherein the Na ؉ and K ؉ ions are nestled. The Na ؉ ion conductivity in I is rather low, but the activation energy for conduction is comparable to those in glasses. Crystal data for I: monoclinic, space group P2 1 /n (No. 14),

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