Hello everyone.

I have simulated 0.1 water in 0.9 n-hexane (Geo. Opt>NVT(100ps)>NPT(2000ps)>NVT(2000)ps). When I draw the MSD to calcalate the diffiusion coefficient the MSD of water flacuate but MSD of n-hexane has constant slope. Is this tru? What's the problem? The files have been attached.

Regards