Good question, it is not explicitly stated in any manual. However, I'd guess
that one should take that what is said in units.f90 is what is actually
used:

  ! Define various unit conversion factors from internal units.

  ! internally, siesta works with length: Bohr.
  !                               energy: Rydberg.
  !                                 time: femtosecond

So I'd guess that the lengths should be the internal ones. I have just
grepped the names of the constants that are stated in units, and I see no
conversions. IMO this is another hint that the units are siesta's internal
ones.

Marcos

On Fri, Oct 1, 2010 at 1:23 PM, Ian Shuttleworth <[email protected]
> wrote:

> Just a quick (I think) related question, to the MPR files:
>
> What are the units of "bond distance range" (an example below) in these
> files?
>
> With thanks
>
> Ian Shuttleworth
>
> > Ti3d-O2s  # Coop/Cohp for Ti(3d)-O(2s)
> > Ti_3d
> > 2.0 3.0 # Bond distance range in calculating COOP/COHP
> > O_2s
> > Ti3d-O2p # Coop/Cohp for Ti(3d)-O(2p)
> > Ti_3d
> > 2.0 3.0 # Bond distance range in calculating COOP/COHP
> > O_2p
> > The rest of the lines is pretty self-explanatory, I guess. Hope this
> helps.
> > Marcos
>

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