Abstract
Методами растровой электронной микроскопии и энергодисперсионной рентгеновской спектроскопии установлено распределение ионов лантана в структуре природных цеолитов – стильбита, шабазита, анальцима, мезолита. Показано, что ионы лантана по поверхности зерна цеолита локализованы неравномерно, концентрируясь на различных структурных дефектах в составе кристаллической фазы.
Highlights
This paper presents the results of the study of lanthanum-containing forms of natural zeolites using scanning electron microscopy and energy dispersive X-ray spectroscopy
In electron microscopic photographs of a slice of zeolite grains, an insignificant content of lanthanum is established at local sites
SEM studies of the surface of the grains revealed the concentration of lanthanum ions in the form of clusters, aggregates of rather large sizes, unevenly distributed to a greater extent on the gaps and roughnesses
Summary
This paper presents the results of the study of lanthanum-containing forms of natural zeolites (stilbit, analcime, shabazite, mesolite) using scanning electron microscopy and energy dispersive X-ray spectroscopy. Electron microscopic examination and energy dispersive analysis of the elemental composition of natural zeolites made it possible to establish a predominantly surface, uneven distribution of lanthanum ions. On the surface of the monomineral zeolite grains, lanthanum ions are found in the composition of the crystalline phase localized at various structural defects. It is assumed that lanthanum ions concentrate on the surface of zeolites in the form of aqua and hydroxo complexes.
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