EFFECT OF SILICATE SPECIES ON THE TRANSFORMATION OF FERRIHYDRITE INTO GOETHITE AND HEMATITE IN ALKALINE MEDIA

被引：193

作者：

CORNELL, RM ^{[1
]}

GIOVANOLI, R ^{[1
]}

SCHINDLER, PW ^{[1
]}

机构：

[1] UNIV BERN,ELECTRON MICROSCOPY LAB,CH-3000 BERN 9,SWITZERLAND

来源：

CLAYS AND CLAY MINERALS | 1987年 / 35卷 / 01期

关键词：

CRYSTALS - Morphology - MICROSCOPIC EXAMINATION - SILICATES - Applications;

D O I：

10.1346/CCMN.1987.0350103

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The transformation of ferrihydrite to goethite and/or hematite in alkaline media is strongly retarded by the presence of silicate species. These species probably stabilize ferrihydrite by adsorbing on the particles of ferrihydrite and linking them into an immobile network. At concentrations low enough for the transformation to proceed, silicate species promote the formation of hematite and hinder the nucleation of goethite.

引用

页码：21 / 28

页数：8

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