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Fractal MTW Zeolite Crystals: Hidden Dimensions in Nanoporous Materials
Author(s) -
Wang Lei,
Zhu Shengcai,
Shen Meikun,
Tian Haiwen,
Xie Songhai,
Zhang Hongbin,
Zhang Yahong,
Tang Yi
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704499
Subject(s) - dislocation , spiral (railway) , materials science , zeolite , fractal , crystallography , crystal structure , nanoporous , symmetry (geometry) , phase (matter) , crystal (programming language) , chemical physics , condensed matter physics , nanotechnology , geometry , physics , chemistry , composite material , mathematics , computer science , mathematical analysis , biochemistry , quantum mechanics , programming language , catalysis
Abstract Screw dislocation structures in crystals are an origin of symmetry breaking in a wide range of dense‐phase crystals. Preparation of such analogous structures in framework‐phase crystals is of great importance in zeolites but is still a challenge. On the basis of crystal‐structure solving and model building, it was found that the two specific intergrowths in MTW zeolite produce this complex fractal and spiral structure. With the structurally determined parameters (spiral pitch h, screw angle θ, and spatial angle ψ) of Burgers circuit, the screw dislocation structure can be constructed by two different dimensional intergrowth sections. Thus the reported complexity of various dimensions in diverse crystals can be unified.