According to Wikipedia[1] (or somewhere else, but everyone has Wikipedia  :-) ),
the magnetic permeability is the volumetric susceptability plus one

\mu_r = \chi_m + 1

\chi_m can be found from the link, I sent the last time[2], but the value is

\chi_m = -3.73E-6

// Morten Aaroe
[1]: http://en.wikipedia.org/wiki/Permeability_%28electromagnetism%29
[2]: http://www.periodictable.com/Elements/014/data.html



David Nemeth wrote:
> No, that's the dielectric constant.  The magnetic permeability should be 1
> or very close to it.
>
> David Nemeth
>
>