文章基本信息

标题：Experimental investigation of the reaction: An-rich plagioclase + quartz + fluid = analcime-wairakitess
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作者：Liuza Galbarczyk-Gąsiorowska ; Ewa Słaby
期刊名称：Acta geologica Polonica
印刷版ISSN：0001-5709
出版年度：2001
卷号：51
期号：2
页码：155-162
语种：English
出版社：Institute of Geology, University of Warsaw
摘要：The reaction An-rich plagioclase + quartz + fluid = analcime (NaAlSi4O12 * 2H2O) - wairakite (CaAl2Si4O12 * 2H2O)[ss] (solid solution series) has been studied experimentally in the temperature range 350-200oC. Distilled water or 0.1 M NaHCO3 solution was used as fluid. All experiments have been performed under low silica activity. Due to the short duration of the experiments the reaction had not approached equilibrium and partly metastable phases were formed. Wairakite nucleated in the laumontite stability field in the system plagioclase-quartz-H2O. Higher sodium activites led to the formation of mixed analcime-wairakite crystals or analcime crystals. The mechanisms of zeolite formation seems to comprise topotaxial growth on the plagioclase surface caused by a dissolution-precipitation process. Some variations in the nucleation and growth kinetics were noticed which appear to be due to different physico-chemical conditions of zeolite formation.
关键词：Analcime-wairakites [ss] Hydrothermal synthesis;Plagioclase;Growth kinetics