Hidden negative linear compressibility in lithium L-tartrate

Hamish H. -M. Yeung, Rebecca Kilmurray, Claire L. Hobday, Scott C. McKellar, Anthony K. Cheetham, David R. Allan, Stephen A. Moggach

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

By decoupling the mechanical behaviour of building units for the first time in a wine-rack framework containing two different strut types, we show that lithium L-tartrate exhibits NLC with a maximum value, K-max = -21 TPa-1, and an overall NLC capacity, chi(NLC) = 5.1%, that are comparable to the most exceptional materials to date. Furthermore, the contributions from molecular strut compression and angle opening interplay to give rise to so-called "hidden'' negative linear compressibility, in which NLC is absent at ambient pressure, switched on at 2 GPa and sustained up to the limit of our experiment, 5.5 GPa. Analysis of the changes in crystal structure using variable-pressure synchrotron X-ray diffraction reveals new chemical and geometrical design rules to assist the discovery of other materials with exciting hidden anomalous mechanical properties.

Original languageEnglish
Pages (from-to)3544-3549
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume19
Issue number5
DOIs
Publication statusPublished - 7 Feb 2017
Externally publishedYes

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