MAGNETIC-PROPERTIES AND SITE OCCUPANCY OF IRON IN NONTRONITE

被引：20
|
作者：
LEAR, PR
STUCKI, JW
机构：
来源：
CLAY MINERALS | 1990年 / 25卷 / 01期
关键词：
D O I：
10.1180/claymin.1990.025.1.02
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 magnetic susceptibilities of seven different nontronites in their natural oxidation states were measured between 5 and 100 K. Results revealed that the magnetic exchange interaction in all samples was antiferromagnetic, except no clear minimum occurred at the Neel temperature. Possible explanations for this phenomenon which are discussed include magnetic dilution due to isomorphous substitution, and antiferromagnetic frustration due to either non-centrosymmetric distribution of octahedral Fe3+ or tetrahedral Fe3+ substitution. A computer simulation model was developed to demonstrate the effects of these variables on long-range magnetic ordering. -from Authors
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页码：3 / 13
页数：11
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