Leonid,
The lognormal distribution for particle size is not my modeling
(unfortunately), but if you insist, let see once again your equations.
D = Da + 0.25(DaDv)^0.5 and sigmaD = D(Dv/Da - 1/2)/2
For lognormal distribution first equation becomes:
2=(4/3)(1+c)**2+(1/4)sqrt[2*(1+c)**5]
For c=0.05
Title: Message
This is by far the best topic on
this list for a long time as opposed to requests for Journal papers which as
pointed out by someone else is inappropriate in the first place and illegal in
the second.
Nicolae wrote:
(i) but a sum of two Lorentzians
is not sharper than the
Dear all,
Just a simple question about GSAS
refinement:
What physical meaningdoes a negative
extinction coefficient have?
if it's meaningless then, what's going
on?
Thaks indeed,
buna Nicolae,
Not only arithmetic, I think is clear that both R and c were refined in a
whole pattern least square fitting. A private program, not a popular
Rietveld program because no one has inplemented the size profile caused by
the lognormal distribution.
not sure no one did.. we're
Nic,
Thanks,it will take a while (as usual) to implement.
Bob
R.B. Von Dreele
IPNS Division
Argonne National Laboratory
Argonne, IL 60439-4814
-Original Message-
From: Nicolae Popa [mailto:[EMAIL PROTECTED]
Sent: Sunday, April 17, 2005 1:27 AM
To: rietveld_l@ill.fr
Bob,
A nice
