[Pw_forum] Units in dynamical matrix files

[Paolo Giannozzi]

On Jul 8, 2009, at 16:26 , Cristian Degli Esposti Boschi wrote:

> And what are the typical units used for force constants?

I don't think there are "typical" units for force constants:
one chooses a system of units and uses those. All Q-E
codes use atomic Rydberg units, with the exception of
CP that uses atomic Hartree units

P.
---
Paolo Giannozzi, Dept of Physics, University of Udine
via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222