[Opium-talk] about opium pps

[Wu R. <g02...@nu...>]

Dear all,
I generated some pps from opium and did some tests. As I found that the
pps cannot produce proper lattice constants. Have you ever experienced
such a problem?
How to solve this problem then? I am aware of that lda underestimates
the lattice constant while gga go to the contrary.
=20
Rongqn wu=20