At 05:23 PM 2/12/99 +1100, you wrote:
>
>There is an Cu Ka2 elimination algorithm described in:
>J.Appl.Cryst. 8 (1975) p.499-506 by J.Ladell, A.Zagofsky and S.Pearlman
>
>====================================================
>Marek W. Schmidt
>Department of Applied Mathematics
>Research School of Physical Sciences and Engineering
>Australian National University
>====================================================
>
>On Fri, 12 Feb 1999, Nita DRAGOE wrote:
>
>> Hello
>>
>> I am in a search for references concerning Kalpha 2 stripping methods
>> (except that one of Rachinger from 1930 or so...). I would appreciate
>> if someone points me in the right direction.
>>
>> Another question (easy ?) for people more in the knowledge than me:
>>
>> In a typical laboratory XRD experiment (without incident
>> monochromator) one get the overlap of the diffraction with Ka1 and Ka2
>> (neglect Kbeta now).
>> If we separate these two contributions and assume that Ka2 is a
>> statistically "independent" experiment we can obtain two data sets (I
>> think we can assume that they are "independent", is the ergodic(?)
>> theory). If we make Rietveld refinement on both of them we should get
>> the results with different standard deviations since sin(theta)/lambda
>> and intensities are different.
>> What do you think is the relation between Rwp of these two data sets
>> and the original (i.e. overlapped) one ?
>> Because I don't know why this procedure is not applied I guess it is
>> meaningless. Why ?
>>
>> Thanks for comments,
>> N
>> --
>> Nita DRAGOE
>> http://www.hongo.ecc.u-tokyo.ac.jp/~tdragoe
>> ____________________________________________________
>>
We have developed a new and more accurate Cu Ka2 elimination algorithm
which will be published in the next issue of J.Appl.Cryst. (1999) by Cheng
Dong, Hong Chen & Fei Wu.
This new algorithm together with modified version of the previous
algorithms of Rachinger and Ladell are implemented in our x-ray data
analysis program "PowderX", which is freely distributed to academic users.
Cheng Dong
Dr. Cheng Dong
Institute of Physics | Tel. 86-10-62582173
Chinese Academy of Sciences | Fax. 86-10-62568834
P.O.Box 603, Beijing 100080,|E-mail [EMAIL PROTECTED]
P.R. China |
