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.
Part of the crystal structure, showing the formation of R88(32) rings. Atoms marked with a star (*), dollar sign ($), an ampersand (&), a hash symbol (#) are at the symmetry positions (1/2 + x, 1/2 - y, 1 - z), (1.5 - x, 1/2 + y, z), (-1/2 + x, y, 1.5 - z), (1/2 + x, y, 1.5 - z) respectively.
