Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10

The title compound, K5EuLi2F10, belongs to so-called self-activated materials containing lanthanoid ions within the matrix. A common feature of these systems is a large separation between the closest lanthanoid ions, which is one of the crucial factors governing the self-quenching of luminescence. T...

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Main Author: Anna Gagor
Format: Article
Language:English
Published: International Union of Crystallography 2009-11-01
Series:Acta Crystallographica Section E
Online Access:http://scripts.iucr.org/cgi-bin/paper?S1600536809044055
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spelling doaj-320fbca0f31345f782a48958992756592020-11-25T01:38:00ZengInternational Union of CrystallographyActa Crystallographica Section E1600-53682009-11-016511i82i8210.1107/S1600536809044055Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10Anna GagorThe title compound, K5EuLi2F10, belongs to so-called self-activated materials containing lanthanoid ions within the matrix. A common feature of these systems is a large separation between the closest lanthanoid ions, which is one of the crucial factors governing the self-quenching of luminescence. The crystal structure of K5EuLi2F10 is isotypic with other K5RELi2F10 compounds (RE = Nd, Pr). As expected from the lanthanoid contraction, the unit-cell volume for crystal with Eu3+ ions is the smallest of the three structures. Accordingly, the corresponding interatomic RE—RE distances are shorter. In the structure, distorted EuF8 dodecahedra and two different LiF4 tetrahedra, all with m symmetry, are present, forming sheets parallel to (100). The isolated EuF8 dodecahedra exhibit a mean Eu—F distance of 2.356 Å. The K+ cations are located within and between the sheets, leading to highly irregular KFx polyhedra (x = 8–9) around the alkali metal cations. http://scripts.iucr.org/cgi-bin/paper?S1600536809044055
collection DOAJ
language English
format Article
sources DOAJ
author Anna Gagor
spellingShingle Anna Gagor
Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10
Acta Crystallographica Section E
author_facet Anna Gagor
author_sort Anna Gagor
title Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10
title_short Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10
title_full Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10
title_fullStr Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10
title_full_unstemmed Pentapotassium europium(III) dilithium decafluoride, K5EuLi2F10
title_sort pentapotassium europium(iii) dilithium decafluoride, k5euli2f10
publisher International Union of Crystallography
series Acta Crystallographica Section E
issn 1600-5368
publishDate 2009-11-01
description The title compound, K5EuLi2F10, belongs to so-called self-activated materials containing lanthanoid ions within the matrix. A common feature of these systems is a large separation between the closest lanthanoid ions, which is one of the crucial factors governing the self-quenching of luminescence. The crystal structure of K5EuLi2F10 is isotypic with other K5RELi2F10 compounds (RE = Nd, Pr). As expected from the lanthanoid contraction, the unit-cell volume for crystal with Eu3+ ions is the smallest of the three structures. Accordingly, the corresponding interatomic RE—RE distances are shorter. In the structure, distorted EuF8 dodecahedra and two different LiF4 tetrahedra, all with m symmetry, are present, forming sheets parallel to (100). The isolated EuF8 dodecahedra exhibit a mean Eu—F distance of 2.356 Å. The K+ cations are located within and between the sheets, leading to highly irregular KFx polyhedra (x = 8–9) around the alkali metal cations.
url http://scripts.iucr.org/cgi-bin/paper?S1600536809044055
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