Dear cp2k users,<div><br /></div><div>I hope this email finds you well. I have a query regarding my CP2K AIMD simulation involving a water box with periodic boundary conditions (PBC) in the XY direction. Here is an excerpt from my input file:</div><div> <i><font color="#ff0000"> &CELL<br /> ABC 24.4797 24.4797 200.0<br /> ALPHA_BETA_GAMMA 90.0 90.0 90.0<br /> PERIODIC XY<br /> &END CELL</font></i><br /></div><div>During the simulation, I expected that when a water molecule crosses the box in the +X direction, it would reappear from the -X direction due to the periodicity. However, when I visualized the trajectory using VMD, I couldn't observe this behavior. Instead, the water molecule seemed to continue in the same direction after crossing the boundary.<br /><br />I would like to confirm whether this behavior is normal when using the XYZ file format or if any modifications are needed in the input file to correctly represent the periodicity.<br /><br />Any insights or suggestions would be greatly appreciated.<br /><br />Thank you for your time and assistance.<br /><br />Best regards,<br />Subhasish<br /></div>
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