Y[Fe1鈭?/sub>xCox(CN)6]路4H2O (0 猢?#xa0;x 猢?#xa0;1) solid solutions: Synthesis, crystal structure, thermal decomposition and spectroscopic and magnetic properties
- 作者：Diego M. Gila ; J. Guimpelb ; 1 ; Andrea Paesano Jr.c ; Raú ; l E. Carboniod ; 1 ; Marí ; a Iné ; s Gó ; meza ; mgomez@fbqf.unt.edu.ar
- 关键词：Y[Fe1&minus ; xCox(CN)6]· ; 4H2O ; Crystal structure refinement ; Rietveld analysis ; Infrared spectroscopy ; Thermal decomposition
- 刊名：Journal of Molecular Structure
- 出版年：2012
- 期刊代码：62_00222860
- 类别：ch
- 出版时间：16 May, 2012
- 卷：1015
- 期：Complete
- 页码：112-117
- 文件大小：1026 K
摘要
The series of solid solutions Y[Fe1鈭?/sub>xCox(CN)6]路4H2O (0 猢?#xA0;x 猢?#xA0;1) were prepared and characterized by means of powder X-ray diffraction (PXRD), Infrared and M枚ssbauer spectroscopy and magnetic measurements. The thermal decomposition process has been followed by thermogravimetric and differential thermal analysis (TGA-DTA). The crystal structure of the complexes was refined by means of Rietveld analysis. The Y[Fe1鈭?/sub>xCox(CN)6]路4H2O complexes crystallize in the orthorhombic crystal system, space group Cmcm. The Y3+ ion is eight-coordinated forming a bicapped distorted trigonal prism YN6O2. The Fe3+ and Co3+ ions are six-coordinated in the form of an irregular octahedra (Fe,Co)C6 group and cyanide linkages between YN6O2 and (Fe,Co)C6 groups build an infinite polymeric array.
The M枚ssbauer spectra of all solid solutions Y[Fe1鈭?/sub>xCox(CN)6]路4H2O present quadrupolar splittings with negative isomer shifts values due to the existence of a strong 蟺 back-bonding effect from the Fe3+ ion towards the CN ligands. All compounds follow the Curie-Weiss law showing anti-ferromagnetic interactions at very low temperatures.
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