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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Hydrothermal synthesis and structure determination of a new calcium iron ruthenium hydrogarnet
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Hydrothermal synthesis and structure determination of a new calcium iron ruthenium hydrogarnet

机译：新型钙铁钌水电retnet的水热合成和结构测定

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摘要

A new calcium iron ruthenium hydrogarnet with the approximate composition Ca3(Ru2?xFex)(FeO4)2?y(H4O4)1+y (x=1, y≈0.35) has been obtained by hydrothermal synthesis under oxidizing alkaline conditions. The compound crystallizes in the cubic space group Ia3?d (No. 230) with a lattice parameter of a=12.4804(4) ? (T=100 K) and Z=8. The octahedral site of the garnet structure is equally occupied by Ru and Fe, whereas the tetrahedral site is partially occupied by Fe only. A partial substitution of the oxide anions by hydroxide ions is necessary for charge balancing, corresponding to the so-called hydrogarnet defects. The presence of hydroxide groups is proven by infrared spectroscopy. 57Fe M?ssbauer spectroscopic data provide evidence for two different Fe3+ coordination environments as well as a magnetic ordering of two iron substructures with the respective ordering temperature above room temperature. The crystal composition was verified by energy-dispersive X-ray spectroscopy and the thermal behavior of the calcium iron ruthenate was studied by difference thermal analysis.
机译：通过在氧化碱性条件下，通过氧化碱性条件下的水热合成获得了一种具有近似组合物Ca 3（Ru2×Xfex）（FeO 4）2 y（x = 1，y≈0.35）的新的钙钌水胆碱。该化合物在立方体空间组IA3Δd（No.230）中结晶，具有A = 12.4804（4）的晶格参数？ （t = 100 k）和z = 8。石榴石结构的八面体部位被Ru和Fe占据，而四面体部位仅被FE部分占据。氢氧化物离子的氧化物阴离子的部分取代是电荷平衡所必需的，对应于所谓的肝胆缺陷。通过红外光谱证明氢氧化物基团的存在。 57FE M？SSBauer光谱数据为两个不同的Fe3 +配位环境提供证据，以及两个铁子结构的磁性排序，其各自的订购温度高于室温。通过能量分散X射线光谱验证晶体组合物，通过差异热分析研究了铁钌酸钙的热行为。

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