vacuo directive in MD

From NWChem

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In the MD part of the manual, it says that vacuo directive disables periodic boundary conditions. But I still get a PBC box by using vacuo directive, though the box dimension is very large. I am wondering if this box affect calculation results. Thanks

Roy

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There will always be box defined around a system, even if no PBC are used. If you simulation is reporting zero pressures that is an indication that PBC are disabled.


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