Skip to main content
U.S. flag

An official website of the United States government

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.

3. Mass Frame

This frame allows the user to set the mass. The units are amu, or if an angle rather than a distance is used for the x coordinate then the units are amu Å2.

Created May 18, 2016, Updated August 25, 2016