A spin-frustrated cobalt(II) carbonate pyrochlore network

TitleA spin-frustrated cobalt(II) carbonate pyrochlore network
Publication TypeJournal Article
Year of Publication2011
AuthorsZheng YZ, Ellern A, Kogerler P
Journal TitleActa Crystallographica Section C-Crystal Structure Communications
Date Published11
Type of ArticleArticle
ISBN Number0108-2701
Accession NumberWOS:000296738500002

The crystal structure of the cobalt(II) carbonate-based compound cobalt(II) dicarbonate trisodium chloride, Co(CO(3))(2)Na(3)Cl, grown from a water-ethanol mixture, exhibits a three-dimensional network of corner-sharing {Co(4)(mu(3)-CO(3))(4)} tetrahedral building blocks, in which the Co(II) centres define a pyrochlore lattice and reside in a slightly distorted octahedral Co(O-CO(2))(6) environment. The space outside the hexagonal framework defined by these interlinked groups is occupied by Na(+) and Cl(-) ions. Antiferromagnetic coupling between adjacent Co II centres, mediated by carbonate bridges, results in geometric spin frustration which is typical for pyrochlore networks. The Co and Cl atoms reside on the special position (3) over bar, one Na atom on position 2 and a carbonate C atom on position 3.

Alternate JournalActa Crystallogr. Sect. C-Cryst. Struct. Commun.