SYNTHESIS AND CHARACTERIZATION OF EUROPIUM(II)-HOLOBORATES, EU2B5O9CL AND EU2B5O9BR

被引：14

作者：

MACHIDA, K ^{[1
]}

ISHINO, T ^{[1
]}

ADACHI, G ^{[1
]}

SHIOKAWA, J ^{[1
]}

机构：

[1] OSAKA UNIV,FAC ENGN,DEPT APPL CHEM,SUITA,OSAKA 565,JAPAN

来源：

MATERIALS RESEARCH BULLETIN | 1979年 / 14卷 / 12期

关键词：

D O I：

10.1016/0025-5408(72)90222-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Europium(II)-haloborates, Eu2B5O9Cl and Eu2B5O9Br, were synthesized and characterized by X-ray analysis, magnetic susceptibility and luminescent spectral measurements. The chloroborate Eu2B5O9Cl crystallizes in the tetragonal system, D64-P42212, with cell dimensions: a=11.349(4), c=6.500(4) A ̊ and Z=4, and Eu2B5O9Br in the orthorhombic system, C102v-Pnn2 or D122h-Pnnm, with cell dimensions: a=11.503(3), b=11.382(3), c=6.484(2) A ̊ and Z=4. Both of them were paramagnets with paramagnetic Curie temperature at about -1 K, and band emissions peaking at about 430 and 435 nm which were based on a 4f7-4f65d transition of Eu2+ ion were observed on Eu2B5O9Cl and Eu2B5O9Br, respectively. © 1979.

引用

页码：1529 / 1534

页数：6