Mossbauer study of transformation mechanism of Fe cations in olivine after thermal treatments in air

被引：15

作者：

Barcova, K

Mashlan, M

Zboril, R

Martinec, P

机构：

[1] Palacky Univ, Dept Expt Phys, Olomouc 77146, Czech Republic

[2] Palacky Univ, Dept Inorgan & Phys Chem, Olomouc 77146, Czech Republic

[3] Acad Sci Czech Republ, Inst Geon, Ostrava 70800, Czech Republic

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2003年 / 255卷 / 03期

关键词：

D O I：

10.1023/A:1022588500878

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The transformation mechanism of Fe cations in natural olivine after thermal treatments in air has been studied using mainly Fe-57 Mossbauer spectroscopy. gamma-Fe2O3 nanoparticles appear as the primary Fe3+ phase in Mossbauer spectra of olivine samples heated at 600-900 degreesC. These nanoparticles are thermally unstable and they are transformed to alpha-Fe2O3 with the increase of heating time. Another transformation mechanism of iron related with the complete decomposition of olivine structure has been observed at temperatures of 1000 degreesC and higher. The mixed oxide MgFe2O4 with the spinel structure and enstatite MgSiO3 were identified as iron-bearing decomposition products.

引用

页码：529 / 533

页数：5

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