Flux Synthesis, Crystal Structure, and Luminescence Properties of a New Europium Fluoride−Silicate: K5Eu2FSi4O13
- 24 March 2007
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 46 (9), 3619-3622
- https://doi.org/10.1021/ic0700304
Abstract
The crystal structure and luminescence properties of flux-grown crystals of a new europium(III) fluoride-silicate, K5Eu2FSi4O13, 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 5D0-->7F0 transition and the relative intensities of the 5D0-->7F1 and 5D0-->7F2 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) A, b=5.7981(2) A, c=18.1675(6) A, beta=92.248(2) degrees , and Z=2.This publication has 36 references indexed in Scilit:
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