Flux synthesis, crystal structure, and luminescence properties of a new europium fluoride-silicate: K5Eu2FSi4O 13

Pei Yun Chiang, Tsai Wei Lin, Jian Hung Dai, Bor Chen Chang, Kwang Hwa Lii

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Abstract

The crystal structure and luminescence properties of flux-grown crystals of a new europium(III) fluoride-silicate, K5Eu2FSi 4O13, are reported. The structure consists of octahedral dimers of the composition [Eu2O10F], which are linked by unbranched tetrasilicate chains to form a 3-D framework with 5- and 6-ring channels parallel to the b axis where the K+ cations are located. The sharp peaks in the room-temperature emission spectrum are assigned. The number of lines in the region for the 5D07F0 transition and the relative intensities of the 5D07F1 and 5D07F2 transitions confirm the presence of two local Eu3+ environments and strongly distorted Eu3+-ligand surroundings. The room-temperature fluorescence decay curves are well fit by a single-exponential function yielding a lifetime value of about 2.0 ms. Crystal data: monoclinic, space group P21/m, a = 7.1850(2) Å, b = 5.7981(2) Å, c = 18.1675(6) Å, β = 92.248(2)°, and Z = 2.

Original languageEnglish
Pages (from-to)3619-3622
Number of pages4
JournalInorganic Chemistry
Volume46
Issue number9
DOIs
StatePublished - 30 Apr 2007

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