Author Topic: What does a particle radius of 1.0 represents?  (Read 1052 times)

oreneya

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What does a particle radius of 1.0 represents?
« on: June 11, 2017, 01:08:34 PM »
I want to visualize the atoms with their "true" radius in reality. Given a file that already contains the particles type, e.g. Cu, is this 1.0 radius value corresponds to the ~130pm radius of copper?

Alexander Stukowski

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Re: What does a particle radius of 1.0 represents?
« Reply #1 on: June 11, 2017, 08:45:47 PM »
Particle radii in Ovito are specified in natural length units of your simulation, topically angstroms.

The value of 1.0 [angstroms] for the default particle radius is only used as a fallback if no per atom type radius has been set or if it is zero. Otherwise the per-type radii take precedence. If the data file contains named atom types (e.g. "Cu"), Ovito should automatically assign a reasonable radius to the types (e.g. 1.28 angstroms for "Cu"). The default radii for the chemical elements can be modified in the application settings dialog. You can also change the current per-type values after loading a data file by selecting the "Particle types" entry in the list box on the right of the main window.