A POTASSIUM-RICH BEIDELLITE FROM A LATERITE PALLID ZONE IN WESTERN AUSTRALIA

被引：10
作者：
SINGH, B
GILKES, RJ
机构：
[1] Soil Science & Plant Nutrition, Univ of Western Australia, Nedlands
来源：
CLAY MINERALS | 1991年 / 26卷 / 02期
关键词：
D O I：
10.1180/claymin.1991.026.2.07
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：
A smectite formed by weathering of mica in a laterite pallid zone at Boddington, Western Australia has been investigated by analytical electron microscopy. The evidence suggests that this mineral has the chemical composition and swelling properties of ideal beidellite but is anomalous in containing abundant non-exchangeable K. This K balances half of the layer charge that arises mostly from tetrahedral substitution of Al3+ for Si4+, with the K+ occupying one sixth of the sites occupied by K in mica.
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页码：233 / 244
页数：12
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