New X-ray powder diffraction data and Rietveld refinement for Gd2O3 monodispersed fine spherical particles

被引：41

作者：

Pires, AM ^{[1
]}

Davolos, MR ^{[1
]}

Paiva-Santos, CO ^{[1
]}

Stucchi, EB ^{[1
]}

Flor, J ^{[1
]}

机构：

[1] UNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2003年 / 171卷 / 1-2期

关键词：

gadolinium oxide; europium(III); Gd2O3 : Eu3+; precursor; luminescent material; basic carbonate;

D O I：

10.1016/S0022-4596(02)00224-4

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Nominally pure Gd2O3 C-form structure from basic carbonate fine spherical particles and its differences concerning the XRD data among literature patterns using Rietveld method is reported. Gd2O3: Eu3+ from basic carbonate and Gd2O3 from oxalate were also investigated. All samples, except the one from oxalate precursor, are narrow sized, 100-200 nm. Only non-doped Gd2O3 from basic carbonate presents XRD data with smaller d(hkl) values than the literature ones. From Rietveld refinement, non-doped Gd2O3 from basic carbonate has the smallest crystallite size and from oxalate shows the greatest one. Also, the unit cell parameters indicate a plan contraction of the Gd2O3 from basic carbonate. The presence of Eu3+ increases crystallite size when basic carbonate precursor is used to prepare Gd2O3 and avoids plan contraction. The structural differences observed among Gd2O3 samples obtained are related to the type of precursor and to the presence or not of doping ion. (C) 2003 Elsevier Science (USA). All rights reserved.

引用

页码：420 / 423

页数：4

共 18 条

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