Journal
MOLECULAR SIMULATION
Volume 40, Issue 1-3, Pages 6-15Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/08927022.2013.840898
Keywords
zeolites; force field; lattice parameter; structural deformation; alkaline and alkaline earth cations
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We present a transferable force field able to model the structure of zeolites when different cation types are considered. Based on simple functional forms and interactions, it can be easily implemented in most common molecular simulation codes. The optimised force field is validated on structural properties (lattice parameters and Si-O-Al angles) for a large variety of zeolites, including faujasites of different Si/Al ratio and different extra-framework cation types (Li+, Na+, K+, Mg2+, Ca2+ and Co2+). The transferability of the force field was successfully tested on zeolites of different topologies such as FAU, LTA, MFI, FER and TON. The predictive capabilities of the potential were tested on structural deformations of alkaline earth Na, Co-X faujasites with different ion-exchange ratios.
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