Crystal structure, morphotropic phase transition and luminescence in the new cyclosilicates Sr3R2(Si3O9)(2), R=Y, Eu-Lu / Tyutyunnik Alexander P.,Leonidov Ivan I.,Surat Ludmila L.,Berger Ivan F.,Zubkov Vladimir G. // JOURNAL OF SOLID STATE CHEMISTRY. - 2013. - V. 197, l. . - P. 447-455.

ISSN/EISSN:

0022-4596 / нет данных

Type:

Article

Abstract:

A new series of promising luminescent materials, cyclosilicates Sr3R2(Si3O9)(2), R=Y, Eu-Lu, has been synthesized via a solid-state reaction. X-ray and neutron powder diffraction studies show that these oxides crystallize in the monoclinic crystal system (S.G. C2/c, Z=4) and have a morphotropic phase transition between Er and Tm compounds followed by a step-like change of the unit cell constants. Isolated {[}Si3O9] rings located in layers are basic building units and stack with Sr/R layers along the {[}1 0 (1) over bar] direction. The rare earth atoms are distributed among three independent Sr/R sites coordinated by 8, 7 and 6 oxygen atoms, and the Sr-R populations change from mixed to 0.5/0.5 over site (1) and full occupation of sites (2) and (3) by Sr and R. respectively, at the transition. Changes of the conformation and mutual arrangement of {[}Si3O9] rings, as well as exchange of oxygen atoms from the first and the second coordination sphere of two Sr/R sites also feature the phase transition. Luminescence in Sr3Y2(Si3O9)(2):Eu3+ under ultraviolet (UV) excitation has been discussed. (C) 2012 Elsevier Inc. All rights reserved.

Author keywords:

Rietveld refinement; X-ray diffraction; Silicates; Luminescence RARE-EARTH IONS; NEUTRON POWDER DIFFRACTION; SOL-GEL PROCESS; ENERGY-TRANSFER; PHOTOLUMINESCENT PROPERTIES; STRONTIUM METASILICATE; CA3Y2SI3O12 PHOSPHORS; HOST LATTICES; SILICATE; SR

DOI:

10.1016/j.jssc.2012.09.009

Web of Science ID:

ISI:000312281000063

Соавторы в МНС:

Другие поля

Поле	Значение
Month	JAN
Publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE
Address	525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
Language	English
Keywords-Plus	RARE-EARTH IONS; NEUTRON POWDER DIFFRACTION; SOL-GEL PROCESS; ENERGY-TRANSFER; PHOTOLUMINESCENT PROPERTIES; STRONTIUM METASILICATE; CA3Y2SI3O12 PHOSPHORS; HOST LATTICES; SILICATE; SR
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Inorganic \& Nuclear; Chemistry, Physical
Author-Email	ivanleonidov@ihim.uran.ur
ResearcherID-Numbers	Tyutyunnik, Alexander/P-2230-2015 Leonidov, Ivan/I-6576-2013
ORCID-Numbers	Leonidov, Ivan/0000-0002-6635-4747
Funding-Acknowledgement	UB RAS {[}12-T-3-1009, 10-3-02, 11-3-01]
Funding-Text	Authors thank Dr. A. Garcia (ICMCB-CNRS, Pessac, France) for fruitful discussions. This work was supported by the UB RAS under Grants nos. 12-T-3-1009, 10-3-02 and 11-3-01.
Number-of-Cited-References	78
Usage-Count-Last-180-days	7
Usage-Count-Since-2013	53
Journal-ISO	J. Solid State Chem.
Doc-Delivery-Number	053NZ