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首页> 外文期刊>Crystal growth & design >DIFFaX Modeling of Faulting in the Triclinic Zeolite UZM-55 and Description of a New Polymorph: UZM-55FM
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DIFFaX Modeling of Faulting in the Triclinic Zeolite UZM-55 and Description of a New Polymorph: UZM-55FM

机译:三半沸石UZM-55中断层的差异模拟及新多晶型图片的描述:UZM-55FM

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摘要

While zeolites are utilized frequently for hydrocarbon conversion and adsorption applications, faulting sometimes creates difficulty in the structural understanding of these materials. We previously reported the idealized structure of UZM-55 and noted some faulting via transmission electron microscopy and electron diffraction experiments. Here, we delineate the fault mode and generate the faulted polymorph model, UZM-55FM. UZM-55FM is also triclinic with the same kinked, one-dimensional pore containing 10-MR and 12-MR delimiting rings but with an AB(A) stacking sequence rather than an ABC sequence as in the idealized UZM-55 structure. The DIFFaX program was used to model a full range of faulting probabilities after constructing an orthogonal layer and three-dimensional stacking vector, and showed that experimentally synthesized UZM-55 possesses about 20% faulting of a 2-fold type operation on the b axis.
机译:虽然沸石经常用于烃转化和吸附应用,但断层有时会在对这些材料的结构理解中产生难度。 我们之前报道了UZM-55的理想化结构,并通过透射电子显微镜和电子衍射实验指出了一些故障。 在这里,我们描绘了故障模式并生成故障的多晶型模型UZM-55FM。 UZM-55FM也是三角形,其具有相同的扭结,一维孔,含有10-MR和12-MR限定环,但是用AB(A)堆叠序列而不是ABC序列,如在理想的UZM-55结构中。 在构建正交层和三维堆叠向量之后,Diffax程序用于模拟全系列的故障概率,并且显示实验合成的UZM-55具有在B轴上的2倍型操作的约20%的误差。

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  • 来源
    《Crystal growth & design》 |2019年第10期|共6页
  • 作者单位

    Honeywell UOP Adv Characterizat 25 East Algonquin Rd Des Plaines IL 60017 USA;

    Honeywell UOP Adv Characterizat 25 East Algonquin Rd Des Plaines IL 60017 USA;

    Honeywell UOP Exploratory Catalysis &

    Mat Res 25 East Algonquin Rd Des Plaines IL 60017 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
  • 关键词

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