Luminescence analysis and subsequent revision of the crystal structure of triclinic L-EuBO3

被引：34

作者：

Corbel, G

Leblanc, M

Antic-Fidancev, E

Lemaître-Blaise, M

Krupa, JC

机构：

[1] Univ Maine, UPRES A 6010, Lab Fluorures, F-72085 Le Mans, France

[2] ENSCP, UMR 7574, Lab Chim Appl Etat Solide, F-75231 Paris 05, France

[3] Inst Phys Nucl, IN2P3, CNRS, F-91406 Orsay, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 287卷 / 1-2期

关键词：

orthoborates; low temperature form; crystal structure; luminescence; cross relaxation;

D O I：

10.1016/S0925-8388(99)00023-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure of L-EuBO3 is revised by using the centric P-1 space group with two crystallographic sites for Eu3+, in perfect agreement with the luminescence results (site A and site B). The structure, refined from single crystal X-ray diffraction data, is triclinic, space group P-1, Z = 4, with a = 6.468(7) Angstrom, b = 6.477(7) Angstrom, c = 6.220(7) Angstrom, alpha = 107.78(6)degrees, beta = 108.00(7)degrees, gamma = 93.07(4)degrees, R-1 = 0.025, wR(2) = 0.062. The three-dimensional network is built up from corrugated sheets of EuO8 polyhedra, approximately parallel to the ((1) over bar (1) over bar 1) planes. Luminescence analysis indicates that site to site energy transfer is efficient at 77 K and is phonon assisted from site B to site A. At 12 K, this site B to site A phonon coupling disappears. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：71 / 78

页数：8

共 17 条

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