STRUCTURAL STUDIES OF SILICA SPRINGS ALLOPHANE

被引：31

作者：

CHILDS, CW ^{[1
]}

PARFITT, RL ^{[1
]}

NEWMAN, RH ^{[1
]}

机构：

[1] DSIR,DIV CHEM,LOWER HUTT,NEW ZEALAND

来源：

CLAY MINERALS | 1990年 / 25卷 / 03期

关键词：

D O I：

10.1180/claymin.1990.025.3.08

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 spectra are consistent with a mixture of Si-O-Si, Si-O-Al, and Si-OH linkages. A structure based on fragments of single curved 1:1 aluminosilicate layers, with the tetrahedral sheet on the outer surfaces, is suggested, the diameter of curvature being 2-3 nm. Electron micrographs suggest that, at least in some cases, the fragments from more or less complete spherules. The minimum pH at which Silica Springs allophane has precipitated corresponds to the initial presence of tetrahedrally coordinated Al species in solution. -from Authors

引用

页码：329 / 341

页数：13

共 26 条

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[2]

Fanning D. S., 1977, Minerals in Soil Environments (Dixon, J.B.

[3]

Weed, S.B., Editors)., P195

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