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本文收集了一组钛榴石样品,作了穆斯堡尔谱和化学分析。采用各对应双峰等值限制拟合。拟合结果,统计误差X~2均较小。文中还分析了钛榴石结构的阳离子占位情况,并对其五对双峰谱指派如下:Fe~(3+)在[Y]位和(Z)位,Fe~(2+)在{X}和[Y]位,而另一对双峰指派为Fe~(2+){X}→Fe~(3+)(Z)的电荷离域。从化学分析和穆斯堡尔谱数据求出二种方法Fe~(2+)/∑Fe的差值,说明钛榴石中有Ti~(3+)的存在,用此简便方法估算了Ti~(3+)的含量,得出了四面体中阳离子的占位择优为Fe~(3+)>(Al~(3+),Ti~(4+))的结论。
This article collected a group of garnet samples, made Mossbauer spectroscopy and chemical analysis. The corresponding bimodal equivalent limit fitted. Fitting results, statistical error X ~ 2 are smaller. In this paper, the cation occupancy of the garnet structure is also analyzed. The five pairs of bi-modal spectra are assigned as follows: Fe ~ (3+) at [Y] and (Z) X} and [Y] bits while the other pair of bimodals assign charge delocalization of Fe ~ (2 +) {X} → Fe ~ (3 +) (Z). The difference of Fe ~ (2 +) / ΣFe was calculated from the chemical analysis and Mossbauer spectroscopy data to show the existence of Ti ~ (3 +) in the garnet. Using this simple method, the Ti ~ (3 +), the conclusion that the dominant position of the cation in the tetrahedron is Fe ~ (3 +)> (Al ~ (3 +), Ti ~ (4 +)) is obtained.