Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Views of the T = 1.82 chiral fibre (a) showing particle centres only, projected onto a plane perpendicular to the main thread axis and coloured for layer: green, 1; blue, 2; red, 3; (b,c) different views showing the particles in layers 0 and 2 fully resolved and colour-coded for orientation.
