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Porosity and Absorption of Aggregate01:20

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Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
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Embedded Isoreticular Zeolites: Concept and Beyond.

Jung Cho1, Hyun June Choi1, Peng Guo2

  • 1Center for Ordered Nanoporous Materials Synthesis, Division of Environmental Science and Engineering, POSTECH, Pohang, 37673, Korea.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 9, 2017
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Summary
This summary is machine-generated.

Researchers present naming and building rules for embedded isoreticular zeolites (EIZs). A new KFI family of EIZs was identified, offering insights for predicting novel zeolite structures.

Keywords:
crystal engineeringembedded isoreticular zeolitesmicroporous materialsnaming rulesstructure predictionzeolites

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Area of Science:

  • Materials Science
  • Crystallography
  • Chemistry

Background:

  • Embedded isoreticular zeolites (EIZs) offer tunable properties for various applications.
  • Understanding the structural complexity and building principles of EIZs is crucial for their rational design.

Purpose of the Study:

  • To establish naming and building rules for body-centered cubic EIZs using the lta cage.
  • To explore the generation of new EIZ families through cage rearrangements and computational methods.
  • To identify and validate a unique EIZ family based on structural coding.

Main Methods:

  • Development of naming and building rules for EIZs.
  • Utilizing strong reflections and fragment methods for zeolite structure prediction.
  • Analysis of structure factor amplitudes and phases for structural coding.
  • Local interatomic distance and T-T-T angle analysis for structural credibility.

Main Results:

  • Presented naming and building rules for body-centered cubic EIZs with lta cages.
  • Generated three new zeolite families: HPO, RHO(b), and KFI.
  • Identified the KFI family as the sole EIZ family exhibiting consistent structural coding.
  • Confirmed the existence of tetragonal EIZ families.

Conclusions:

  • The established rules facilitate the prediction of novel EIZ structures.
  • The KFI family represents a unique and structurally validated EIZ family.
  • This work provides a framework for discovering unprecedented EIZ families.