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Space Filling Versus Symmetry: Two Consecutive Crystal‐to‐Crystal Phase Transitions in a 2D Network
Author(s) -
Hu Chunhua,
Englert Ulli
Publication year - 2006
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.200504460
Subject(s) - crystal (programming language) , symmetry (geometry) , crystal structure , crystallography , materials science , phase (matter) , condensed matter physics , chemistry , physics , geometry , mathematics , quantum mechanics , computer science , programming language
Three structures for the price of one : The room‐temperature phase of the 2D network [Pb(μ‐Cl) 2 (μ‐bipy)] ∞ (bipy=4,4′‐bipyridine) undergoes crystal‐to‐crystal transformations both upon cooling (see picture; Pb pink, Cl green, N blue, C gray, H white) and upon heating. With increasing temperature, decreased packing efficiency is traded for higher symmetry.