English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Single-crystal elastic moduli, Cij, and the B1-B2 phase transition of NaClwere investigated experimentally, using time-domain Brillouin scattering(TDBS), and theoretically, via density-functional-theory (DFT), to 41 GPa.Thus, we largely extended pressure range where Cij and elastic anisotropy ofthe solid are measured, including the first experimental data for thehigh-pressure B2 phase, NaCl-B2. NaCl-B1 exhibits a strong and growing withpressure anisotropy, in contrast to NaCl-B2. Theoretical values obtained usingdifferent advanced DFT functionals were compared with our measurements but noone could satisfactorily reproduce our experimental data for NaCl-B1 andNaCl-B2 simultaneously. For all available DFT results on the principal shearmoduli and anisotropy, the deviation became pronounced when the degree ofcompression increased significantly. Similar deviations could be alsorecognized for other cubic solids having the same B1-type structure and similarbonding, such as CaO, MgO, or (Mg1-x,Fex)O. Furthermore, the availableexperimental data suggest that the B1-B2 phase transition of NaCl and the abovementioned compounds are governed by the Born stability criterion C44(P) - P >0.

Single-crystal elastic moduli, anisotropy and the B1-B2 phase transition of NaCl at high pressures: Experiment vs. ab-initio calculations