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Synthesis and crystal structure of a new polymorph of potassium europium(III) bis(sulfate) mono-hydrate, KEu(SO4)2·H2O.


ABSTRACT: The mixed-metal sulfate, KEu(SO4)2·H2O, has been obtained as a new polymorph using hydro-thermal conditions. The crystal structure is isotypic with NaCe(SO4)2·H2O and shows a three-dimensional connectivity of the tetra-hedral sulfate units with EuIII and KI ions. Tricapped trigonal-prismatic EuO9 units and square-anti-prismatic KO8 units link the SO4 tetra-hedra, building the three-dimensional structure. Topological analysis reveals the existence of two nodes with 6- and 10-connected nets. The compound was previously reported [Kazmierczak & Höppe (2010 ?). J. Solid State Chem.183, 2087-2094] in the monoclinic space group P21/c with a similar structural connectivity and coordination environments to the present compound.

SUBMITTER: Paul AK 

PROVIDER: S-EPMC5956346 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature

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Synthesis and crystal structure of a new polymorph of potassium europium(III) bis(sulfate) mono-hydrate, KEu(SO<sub>4</sub>)<sub>2</sub>·H<sub>2</sub>O.

Paul Avijit Kumar AK  

Acta crystallographica. Section E, Crystallographic communications 20180126 Pt 2


The mixed-metal sulfate, KEu(SO<sub>4</sub>)<sub>2</sub>·H<sub>2</sub>O, has been obtained as a new polymorph using hydro-thermal conditions. The crystal structure is isotypic with NaCe(SO<sub>4</sub>)<sub>2</sub>·H<sub>2</sub>O and shows a three-dimensional connectivity of the tetra-hedral sulfate units with Eu<sup>III</sup> and K<sup>I</sup> ions. Tricapped trigonal-prismatic EuO<sub>9</sub> units and square-anti-prismatic KO<sub>8</sub> units link the SO<sub>4</sub> tetra-hedra, building the  ...[more]

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