The structures of 'textbook' NaCl (left) and 'forbidden' A3Y (A=Li, Na, K; Y= Cl, Br) (right) are shown. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases ...

Fölsch et al. 20 reported a puckered hexagonal c(4 × 2) bilayer structure on NaCl(001) surface by low energy electron diffraction (LEED) analysis, which is different from what we observed in ...