I could only find the structure parameters for Cs2Si2O5 in our reasonably
updated ICSD database. I wonder if there are any published structure data
out there. Good luck.
Tao
10/30/98
On Fri, 30 Oct 1998, Hongwu Xu wrote:
> Dear All:
>
> Does anyone have structural information (space grou
NRC-NIST Postdoctoral Research Associate
(Two-year term, $48,500/year)
This position requires a Ph. D. in Material Science/Engineering or Physics
awarded not earlier than five years before the time of application. The
anticipated starting date is July 1, 1999. The pos
review rietveld_l
Dear All:
Does anyone have structural information (space group, cell
parameters, atomic positions) of Cs2SiO3? The thermodynamic data for this
compound are available but I couldn't find any crystallographic info..
Thanks,
Hongwu Xu
Dear All,
I have been looking for some time for references to demonstrate that a
capillary
sample setup is better than a flat plate setup in reducing preferred
orientation - particularly for synchrotron radiation. (Assumptions - eg same
sample, operator etc)
Clearly common sense indicates that c
>Uii should be positive and greater than 0 to make physical sense.
Yes. In particular Uij should be a positive definite matrix. If Uii is
negative it means that some systematic error is being soaked up there
eg lack of an absorbtion correction will reduce the apparent temperature
factor, sinc
I do not know bout Lij but Uij can be negative -- However only when "i" is not equal
"j".
Uii should be positive and greater than 0 to make physical sense. Moreover,
there are other restrictions too and I can find them if you are interested.
Dr. Peter Y. ZavalijUniversity Crystallographer
Hi,
Concerning the "phase composition". Exactly what is it used for?
> Dear Tao (and others),
> The phase fractions are proportional to "mole fraction unit cells" of each
> phase in the sample. They need not sum to unity but can be rescaled by hand
> if desired. The .lst file output from GENLES c
x y z B
Zr 0 0 0 1.66
O 0 .5 .1853.11
a 3.64
b 3.64
c 5.27
Bruce A. Hudgens
Research Associate
USG Research & Technical Center
700 N Hwy 45
Libertyville, IL 60048
[EMAIL PROTECTED]
(847) 970-5064 Voice
(847
Hi everyone
I need some help with the atomic positions for
the following Zirconium Oxides.
1. Tetragonal (24-1164 , 42-1164, 17-0923) and
2. the cubic form
Can anyone help me?
Thanks
Regards Jack
Sorry,
the announced new BGMN web site is defective since 7:50 GMT.
We are working on this problem. Please, visit the site again, later!
Thank you!
Joerg Bergmann
Dear all,
I am working with GSAS for structure refinement. I am new in the field. So I
probably have some silly questions. When I introduce anisotropic thermal
parameters (U11, U22, ... U23) some of them are negative. Is this possible?
Should I always refine U12, U13 and U23? I used the third pea
Hi all,
there are good news about BGMN. The BGMN web site was moved to:
http://www.bgmn.de
This site is located on a high-performance server. Therefore,
you should be able for reading/download from all over the world.
Of course, Lachlan Cranswick is mirroring this new site.
In addition, this s
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