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Query with identify diamond modifier

For "identify diamond modifier": Does this work only when the simulation box is cubic?

The number of atoms in diamond structure is different for cubic and non-cubic simulation boxes. I am wondering if this due to OVITO or the MD simulation itself. The other conditions, including starting configurations are same for the two simulation boxes.

Generally, the shape of the simulation cell should have no influence on the results of the Identify Diamond modifier. The modifier can deal with non-cubic cells as well as non-orthogonal cells.

Could you please clarify what "non-cubic" means in your case? Is that simulation cell orthogonal but just not cubic? Or is it non-orthogonal (sheared)? To further investigate the origin of the differences you observe, it would be helpful if you could post the two simulation files here, or at least pictures of the two models. Thank you.