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 journalArticlepeer-review

15 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, Kmax = -21 TPa-1, and an overall NLC capacity, χNLC = 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
Early online date6 Jan 2017
DOIs
Publication statusPublished - 7 Feb 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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