High-temperature, high-pressure hydrothermal synthesis, crystal structure, and luminescence properties of Cs3EuSi6O15, a new europium(III) silicate with a three-dimensional framework structure

Meow Yu Huang, Yi Hsiu Chen, Bor Chen Chang, Kwang Hwa Lii

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Abstract

The crystal structure and luminescence properties of hydrothermally grown crystals of Cs3EuSi6O15 are reported. The structure consists of loop-branched vierer double chains of silicate with four-, six-, and eight-membered rings, which are connected via 10-membered rings at their interfaces to form a 3-D silicate framework. The six-coordinate europium atoms are located at sites between six-membered silicate rings. This Cs, Eu silicate is the second example of 3-D silicate framework with Si:O = 2:5, which contains only tertiary [SiU4] tetrahedra. The sharp peaks in the emission spectrum are assigned, and the lifetime measurements confirm the presence of one local Eu3+ environment. Crystal data: monoclinic, space group P21/n, a = 7.1664(1) Å, b = 28.4756(6) Å, c = 8.5418(2) Å, β= 104.976(1)°, V = 1683.89(7) Å 3, and Z = 4.

Original languageEnglish
Pages (from-to)5743-5747
Number of pages5
JournalChemistry of Materials
Volume17
Issue number23
DOIs
StatePublished - 15 Nov 2005

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