Thermal behaviour of analcimes from two different genetic environments
Thermal behaviour of analcimes from two different genetic environments
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来自两种不同遗传环境的方沸石的热行为
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
G. Lombardi
中科院分区：
文献类型：
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作者：
C. Giampaolo;G. Lombardi
来自意大利不同地区的热液方沸石（H型）和白榴石衍生方沸石（X型）具有非常相似的XRD图谱，但热行为不同。H型方沸石的脱水在350° C和370°C之间产生DTA峰，而X型方沸石在235° C和320°C之间产生宽带。H型方沸石的活化能为6.9-7.1千卡/摩尔，而X型方沸石的活化能为5.3千卡/摩尔。这些结果具有相对价值，只是因为它们是从非等温实验中得出的，并且受到所选计算方法的强烈影响。DTA和TG方法都为不同成因环境结晶的方沸石结构中H2O键合能的差异提供了证据
Hydrothermal analcimes (H-type) and leucite-derived analcimes (X-type) from different Italian localities have very similar XRD patterns but different thermal behaviours. Dehydration of the H-type analcime gives a DTA peak between 350° and 370°C, whereas the X-type yields a wide band between 235° and 320°C. Activation energy in the H-type analcime is 6.9-7.1 kcal/mole, whilst in the X-type it is 5.3 kcal/mole. Such results are of relative value only because they are derived from non-isothermal runs and are strongly affected by the chosen method of calculation. Both DTA and TG methods provide evidence for a difference in the H 2 O bonding energies within the analcime structure crystallized in different genetic environments