THERMAL-STABILITY OF HALLOYSITE BY HIGH-PRESSURE DIFFERENTIAL THERMAL-ANALYSIS

被引:19
作者
JOHNSON, SL
GUGGENHEIM, S
VANGROOS, AFK
机构
关键词
D O I
10.1346/CCMN.1990.0380503
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
Platy (Te Puke, New Zealand), cylindrical (Spruce Pine, North Carolina), and spherical (North Gardiner mine, Huron, Lawrence County, Indiana) halloysite samples were analyzed by high-pressure differential thermal analysis (HP-DTA) to determine the effect of morphological and chemical differences on their respective thermal stability. In halloysite, these morphological differences imply structural features. The lower thermal stability of the Te Puke sample may be related to its higher iron content, although additional data are necessary to confirm that it is not related also to the platy structure. Furthermore, morphological differences between the cylindrical and spherical varieties appear to have had little effect on the energy required to dehydroxylate these halloysite structures. -from Authors
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页码:477 / 484
页数:8
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