From:   SMTP%"Nicki.Agron-Olshina@csiro.au"  9-JUL-2002 03:13:16.67
To:     cockcroft@img.cryst.bbk.ac.uk
CC:
Subj:   FW: need help with Assignment 6

Dear Jeremy Karl,

I sent the following email to you at a different email address and have not
yet received an answer.  Perhaps it will get through to you at the address
used today.

Regards,

Nicki Agron-Olshina

>  -----Original Message-----
> From:         Agron-Olshina, Nicki (Minerals, Clayton)
> Sent:         Wednesday, 3 July 2002 5:29 PM
> To:           'pd@img.cryst.bbk.ac.uk'
> Subject:      need help with Assignment 6
>
> Dear Jeremy Karl,
>
> I have been struggling with Assignment 6 and have come to an impasse.
>
> I have used the Zone Indexing Program to index the first 20 of the 2 theta
> values given in the data sets. Even though some of the ten Equivalent
> Real-Space Unit Cells have suspiciously low Figures of Merit ( N=3 to 6) I
> have tried all ten possibilities in the Program to Generate hkl, d, and 2
> theta Values.
>
>  I made a spread sheet of the values there acquired and compared the
> results.  In every one of the ten possibilities some 2 theta values did
> not index.  The two best fits nevertheless are N=1 and N=9.  If I put the
> N=1 values in the Program to Refine Unit-Cell Parameters and ignore the
> unindexed 2 theta value of 18.27 I get what I think (hope) are reasonable
> values.
>
> We were warned not to ignore low count peaks when indexing but it seems
> that 18.27 just does not fit if included.  Can you give me some hint that
> might get me going in the right direction again?
>
> On another matter, would it be possible to have an extension on the due
> date for Assignment 6?  I have a number of family health issues which
> might prevent my completing this assignment in time.
>
> Thanks for your help in advance.
>
> Regards,
>
> Nicki Agron-Olshina
>
> ------------------------------------------------------------------------
> |Nicki Agron-Olshina   | Email nicki.agron-olshina@minerals.csiro.au   |
> |CSIRO - Minerals      | ph (03)  9545-8711                            |
> |P.O. 312, Clayton Sth | fax (03) 9562-8919                            |
> |Victoria              | Int. Prefix +613                              |
> |Australia    3169     | http//www.minerals.csiro.au                   |
> ------------------------------------------------------------------------
>

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