新型层状混合金属簇合物Fe_2Mo_2Te_4和Fe_2Ta_2Te_4的穆斯堡尔研究

Mossbauer Study of the New Layer-type Mixed Metal Cluster Compounds Fe_2Mo_2Te_4 and Fe_2Ta_2Te_4

本文测定了新型层状混合金属簇合物(a)Fe_2Mo_2Te_4和(b)Fe_2Ta_2Te_4的穆斯堡尔谱。由穆斯堡尔参数确定这两个簇合物的Fe原子都属高自旋+3价,处四面体配位中心。簇合物(a)中两个铁原子是等价的,而簇合物(b)中两个铁原子却是不等价的,这是由于簇合物(b)中Fe_1原子的构型畸变比Fe_1原子大的缘故。

The Mossbauer spectra a new layer-type mixed metal cluster compounds Fe2Mo2Te4 and Fe2Ta2Te4 have been measured. From Mossbauer data, it can be considered that the iron atoms in the two cluster compounds are in +3 high spin state and 4-coordination tetrahedrom. The iron atoms in the cluster compounds Fe2Mo2Te4 are equivalent, and the two iron atoms in the molecule of cluster compounds Fe2Ta2Te4 are non-equivalent.