Hi Alan,
Accelerator-driven neutron sources are a lot cheaper than spallation
sources. Moreover, Figure 54 in the ICONE document shows that the
scientific productivity of neutron sources does not depend on the flux
of the source. And the biggest point might be the return to building new
Hi Lubo,
if we speak of diffraction, we have a Fourier transformation, so we
are not 100% in the direct space with any structure solution method.
However, the "structure solution in direct space" does not attempt to
work in the reciprocal space - all the manipulations are done in the
direct
Title: Re: Cyberstar hot air blowers
Hello Simon,
we are successfully using a programmable hot air blower (25-750°C) called Le Mini Sensor Kit 800, from the Swiss company Leister. It costs about 2000 CHF, and is aimed at the industrial use. It allows to do ramps, it follows the protocol very
URL :http://www.unige.ch/sciences/crystal/cerny/rcerny.htm
De :alan.he...@gmail.com[mailto:alan.he...@gmail.com]De la part deAlan Hewat
Envoyé :vendredi 3 juillet 2015 12:15
À :Yaroslav Filinchuk UCL
Cc :SAJ Kimber;rietveld_l@ill.fr
Objet :Re: Cyberstar hot air blowers
2000 CHF? Precise temperatu
Dear Christina,
Chi2 may be small because of a high noise, so it indicates that the
model is over-refined with respect to the quality of the data (quick
collection using analyzer crystal). This is a trivial case and you
can't help it.
The other (more likely) option is that you have low-noise
Title: Re: diffraction patterns or spectra
Dear Brian,
to me spectroscopy sounds as a technique were an energy spectrum is used,
i.e. the light of different energies has a different absorption coefficient (IR),
or there is a different energy transfer for a fixed wavelength (Raman, INS, IXS).
of values, like a diagonalised matrix. Needless to say that in many
cases FT is standing between us and the physics and a
spectrum we see does not represent (directly!) a picture of the physics
behind any more.
Lubo
On Fri, 12 Feb 2010, Yaroslav Filinchuk, SNBL at ESRF wrote:
Dear Lubo,
I
Dear Martin,
What is called texture in the link you've provided actually is a
bad powder average. Texture sounds to me as a rather general term,
while preferred orientation is its particular case. Texture is
the distribution of crystallographic orientations in a
Dear Gerard,
The low-angle intensity problem might come from disordered
regions, like water or solvent molecules occupying some voids.
Also, poor modeling of weakly scattering atoms, like hydrogen,
may lead to the similar problem.
Best regards,
Yaroslav
http://filinchuk.com
You can merge the equivalents using Xprep.
===8==Original message text===
Dear All
Does anyone know a program for removing redundant and/or
symmetry-equivalent reflections from single crystal datasets
(typically hkl-files: h k l intensity)? Such data is necessary for
Dear Peter,
the most correct constraint would be to fix a sum of coordinates
of all atoms along polar axis, but not only of the first two.
It gives the best estimation of the standard uncertainties.
Yaroslav Filinchuk
PZ Bob,
PZ Thank you for the clarification. I never had doubts
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