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[xd0533@163.com]

dear PMA;
I tried HGH pseudopotentials.Its ecut is very high.For different ecut(I 
choose ecut from 60 to 100),the total energy is in big difference(2eV).The 
total energy is changeable all the time.It is hard to converge in ecut.Higher 
ecut,more time.So,I give up  HGH pseudopotentials.
I saw  the parameter strfact.But its explaination is simple.I don't 
understand it.Can you show me how to settle  the parameter?Thank you!
Best wishes!
xiang