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首页> 外文期刊>Hyperfine Interactions: Journal Devoted to Research in the Border Regions of Solid State, Atomic and Nuclear Physics >BaSnF4 fast ion conductor: Variations versus the method of preparation and anomalous temperature variation of the quadrupole splitting
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BaSnF4 fast ion conductor: Variations versus the method of preparation and anomalous temperature variation of the quadrupole splitting

机译：BaSnF4快速离子导体：四极分裂的变化与制备方法的关系以及温度的异常变化

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摘要

A new method of preparation of high performance fluoride ion conductor, BaSnF4, by water leaching of newly discovered barium tin(II) chloride fluorides, has been designed, and the materials have been studied and compared to the solid prepared by the usual dry method. The unit-cell parameters and crystallite dimensions were found to vary with the method of preparation. In addition, the crystallite dimensions were found to be highly anisotropic for the samples obtained by the wet method. The Mossbauer spectrum is made of a large tin(II) quadrupole doublet, and a broad tin(IV) oxide peak due to surface oxidation. The tin(II) spectrum is in agreement with covalently bonded tin(II) having a strongly stereoactive lone pair. An unusually high dependence of the quadrupole splitting at low temperatures was observed (5.8 times larger than for alpha-SnF2).
机译：设计了一种通过水浸新发现的氯化钡锡（II）氟化物制备高性能氟化物离子导体的新方法BaSnF4，并对其材料进行了研究并与通过常规干法制备的固体进行了比较。发现晶胞参数和微晶尺寸随制备方法而变化。另外，发现通过湿法获得的样品的微晶尺寸是高度各向异性的。 Mossbauer光谱由一个大的四级锡（II）锡和由于表面氧化而形成的一个宽的锡（IV）氧化峰组成。锡（II）光谱与具有强立体活性孤对的共价键合锡（II）一致。观察到低温下四极分裂的异常高依赖性（比α-SnF2大5.8倍）。

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