Dear All,I would need to get good quality powder pattern, suitable for Rietveld
analysys, working on mineral microcrystalline fragments with dimensions around
0.1-0.2 mm. From your experience, which could be an European synchrotron
beamline with a suitable experimental setup to get these data?b
Dear Natale,
do you think about a Gandolfi like setup? Or can the fragments be
crushed?
best
Miguel
---
michele gregorkiewitz
Dip Scienze Fisiche, della Terra e dell'Ambiente
Università di Siena
via Laterina 8, I-53100 Siena
gre...@unisi.it, +39'0577'233810
Il 2015-07-29 11:33 Natale Perc
Dear Natale,
Why you are not collecting single crystal data with such beautiful crystals?
For powders the best beamline is that one which will be the first to give you
the beamtime☺
Radovan Cerny
Laboratoire de Cristallographie, DQMP
Université de Genève
24, quai Ernest-Ansermet
CH-1211 Geneva
… or, indeed, can the fragments be put on a 4-circle single crystal machine at
your local university?!
Simon
> On 29 Jul 2015, at 10:48, GREGORKIEWITZ MICHAEL
> wrote:
>
> Dear Natale,
>
> do you think about a Gandolfi like setup? Or can the fragments be crushed?
>
> best
>
> Miguel
>
>
Hola Miguel,
A Gandolfi like setup would be definitely easier. I guess you suggest
alternatevely to crush and dilute the material in a matrix? !
Cheers Natale
Inviato da Yahoo Mail su Android
Da:"GREGORKIEWITZ MICHAEL"
Data:Mer, 29 Lug, 2015 alle 12:16
Oggetto:Re: synchrotron beamline info
Dear Natale
A good quality powder pattern starts with a good quality powder. Using a
2D area detector is probably easier than trying to align a small sample
on a Gandolfi spinner, to increase grain statistics. Also a lower
resolution instrument will have fewer problems for grain averaging. Wit
dear Natale,
I think a combination of Gandolfi spinning and 2D detector could indeed
be interesting!
Both reorientation and detector height matter:
J Applied Crystallography (1994) 27: 855-859.
best
Miguel
---
michele gregorkiewitz
Dip Scienze Fisiche, della Terra e dell'Ambiente
Universit
About ten years ago, I was working on a D4 with lynx eye, had to put an air scatter blocker 1 or 2 mm above the powder sample. In the beginning, I had to put simple geometry into the bgmn configuration sav-file until Dr Bergmann put a parameter airscatter=#. Now I came back to the business with a D
About ten years ago, I was working on a D4 with lynx eye, And had to put an air scatter blocker 1 or 2 mm above the powder sample with fixture on the stage. In the beginning, I had to put simple geometry into the bgmn configuration sav-file until Dr Bergmann put a parameter airscatter=#. Now I came
Hi
What do you mean by "handle it"?
If the knife edge is correctly set up, the only thing that should change is
the background.
Matthew Rowles
On 30 Jul 2015 3:04 am, "ji zhang" wrote:
>
> About ten years ago, I was working on a D4 with lynx eye, had to put an
> air scatter blocker 1 or 2 mm a
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Hi Jilin
You could probably add a note to your input file.
Not everything you use in your hardware can be either properly modelled, or
influence the pattern significantly. Do you need to model the anti-scatter
slits? They help reduce background.
One thing that could happen is that if the knife i
Hi Matthew,
what you mentioned earlier is not completely correct:
An anti-air scatter (or beam knife) does not only reduce background (mainly
at low angles), but also cuts intensity at higher 2theta values, if not
installed correctly. It does not result in a sample displacement error, it
just
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