Mössbauer spectroscopy in the investigation of new mineral–related materials
Mössbauer spectroscopy in the investigation of new mineral–related materials
复制标题
穆斯堡尔光谱在新矿物相关材料研究中的应用
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Marco
中科院分区：
文献类型：
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作者：
F. Berry;B. P. Laune;C. Greaves;M. J. Whitaker;Michael F. Thomas;J. Marco
New materials based on the composition of the mineral schafarzikite, FeSb2O4$_{2} extit {O}_{4}$, have been synthesised. 57$^{57}$Fe- and 121$^{121}$Sb- Mössbauer spectroscopy shows that iron is present as Fe2+$^{2+}$ and that antimony is present as Sb3+$^{3+}$. The presence of Pb2+$^{2+}$ on the antimony sites in materials of composition FeSb1.5$_{1.5}$Pb0.5O4$_{0.5} extit {O}_{4}$ induces partial oxidation of Fe2+$^{2+}_{}$to Fe3+$^{3+}$. The quasi-one-dimensional magnetic structure of schafarzikite is retained in FeSb1.5$_{1.5}$Pb0.5O4$_{0.5} extit {O}_{4}$ and gives rise to weakly coupled non-magnetic Fe2+$^{2+}$ ions coexisting with Fe3+$^{3+}$ ions in a magnetically ordered state. A similar model can be applied to account for the spectra recorded from the compound Co0.5$_{0.5}$Fe0.5$_{0.5}$Sb1.5$_{1.5}$Pb0.5O4$_{0.5} extit {O}_{4}$.
New materials based on the composition of the mineral schafarzikite, FeSb2O4$_{2} extit {O}_{4}$, have been synthesised. 57$^{57}$Fe- and 121$^{121}$Sb- Mössbauer spectroscopy shows that iron is present as Fe2+$^{2+}$ and that antimony is present as Sb3+$^{3+}$. The presence of Pb2+$^{2+}$ on the antimony sites in materials of composition FeSb1.5$_{1.5}$Pb0.5O4$_{0.5} extit {O}_{4}$ induces partial oxidation of Fe2+$^{2+}_{}$to Fe3+$^{3+}$. The quasi-one-dimensional magnetic structure of schafarzikite is retained in FeSb1.5$_{1.5}$Pb0.5O4$_{0.5} extit {O}_{4}$ and gives rise to weakly coupled non-magnetic Fe2+$^{2+}$ ions coexisting with Fe3+$^{3+}$ ions in a magnetically ordered state. A similar model can be applied to account for the spectra recorded from the compound Co0.5$_{0.5}$Fe0.5$_{0.5}$Sb1.5$_{1.5}$Pb0.5O4$_{0.5} extit {O}_{4}$.