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A pseudo-merohedrally twinned rare-earth sulfate: K6[Ce(HSO4)2(SO4)4]·H2O, a novel structure type

Barbara M. Casari ; Vratislav Langer (Institutionen för kemi- och bioteknik, Oorganisk miljökemi)
Acta Crystallographica C: Crystal Structure Communications (0108-2701). Vol. C63 (2007), 4, p. i25-i27.
[Artikel, refereegranskad vetenskaplig]

A novel structure type of an acidic rare-earth sulfate, hexapotassium cerium dihydrogensulfate tetrasulfate monohydrate, is reported. The crystal is twinned, mimicking tetragonal symmetry. The CeIV atom is nine-coordinate, connecting to one corner-sharing and four edge-sharing sulfate groups. One of the potassium ions is disordered over two general positions. The compound is unique as it contains rare-earth monomers, [Ce(HSO4)(SO4)4]5-. The structure is composed of these monomers, water molecules, discrete hydrogensulfate ions and potassium ions held together by ionic interactions. There are two types of alternating layers in the structure, with compositions [K4Ce(HSO4)(SO4)4]- and [K2(HSO4)(H2O)]+.

Nyckelord: cerium, crystallography, coordination

Denna post skapades 2007-04-25. Senast ändrad 2007-04-25.
CPL Pubid: 40932


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Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)


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