[Pw_forum] calculation about isotope substitution

[li niu]

Dear Stefano de Gironcoli and L.F.Huang,

  Thank you so much for your help and quick reply. I understand your mean and I will do it right now. Thanks again for your kind help.

Wishing you a sparkling Christmas and bright happy New Year!

Best Regards,

Li Niu
Ph.D. Candidate,
Center for Composite Materials,
Harbin Institute of Technology,
Harbin, Heilongjiang, 150080, China



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