Difference between revisions of "Standards Data"
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===NAC (Na2Ca3Al2F14)=== | ===NAC (Na2Ca3Al2F14)=== | ||
Na2Ca3Al2F14 (NAC) is not a official SRM from NIST, but can be used as a low Z sharp line profile standard with strong peaks at lower 2theta (compared to LaB6) | Na2Ca3Al2F14 (NAC) is not a official SRM from NIST, but can be used as a low Z sharp line profile standard with strong peaks at lower 2theta (compared to LaB6) See [''http://www.sciencedirect.com/science/article/pii/0022459688902393 JSSC Volume 76, Issue 2, October 1988, Pages 426–431] | ||
'' | |||
===== 11-BM data for NAC ===== | ===== 11-BM data for NAC ===== | ||
*[http://11bm.xray.aps.anl.gov/data/standards/NAC/current/11BM_NAC.fxye GSAS .fxye format] | *[http://11bm.xray.aps.anl.gov/data/standards/NAC/current/11BM_NAC.fxye GSAS .fxye format] | ||
Revision as of 15:50, 28 October 2014
starting May 2013, data are moved here from the 11BM webpage (http://11bm.xray.aps.anl.gov/standards_data.html)
Standard Reference Materials
Details of powder diffraction data measured at 11-BM for standard reference materials are listed below and are available in several formats. These are periodically updated. Contact 11-BM staff with questions.
Data are typically measured at ~ 30 keV under ambient conditions. Check the file header for full details and scan parameters.
More information about 11-BM data collection and data formats can be found here:
NIST SRM Certificates (with lattice values etc) are available for download here:
Lanthanum Hexaboride (LaB6) - SRM 660a
NIST SRM 660a data
Rietveld Fit LaB6 660a
- CIF file for LaB6 660a
- LaB6 Rietveld Fit Notes with GSAS
- LaB6 Rietveld Fits with GSAS-II
- LaB6 Rietveld Fits with Topas
- LaB6 660a Plot (png)
Lanthanum Hexaboride (LaB6) - SRM 660b
SRM 660b is the NEW reference material for LaB6 from NIST see Powder Diffraction, Volume 26, Issue 02, pp 155-158
NIST SRM 660b data
Rietveld Fit LaB6 660b
- CIF file for LaB6 660b
- LaB6 660b Rietveld Fit Notes with GSAS/EXPGUI
- LaB6 660b Plot (image of GSAS fit)
Silicon (Si), NIST SRM 640c
- Si 640c Plot (jpg)
- GSAS .fxye format
- GSAS .raw format
- TOPAS .xye format
- ASCII .csv format
- Fullprof .xy format
NIST SRM 674b
Standard Reference Material 674b consists of four oxide powders to be used as internal standards for qualitative X-ray diffraction analysis. See the NIST reference sheets for more information.
ZnO powder for 674b
11-BM data
- ZnO 674b data: GSAS .fxye format
- ZnO 674b data: TOPAS .xye format
- ZnO 674b data: Fullprof .xy format
- ZnO 674b data: ASCII .csv format
Rietveld fits
- CIF file for ZnO 674b
- ZnO 674b Rietveld Fit Notes with GSAS/EXPGUI
- ZnO 674b Plot (image of GSAS fit)
TiO2 674b
Cr2O3 674b
CeO2 powder for 674b
11-BM data
- CeO2 674b data: GSAS .fxye format
- CeO2 674b data: TOPAS .xye format
- CeO2 674b data: Fullprof .xy format
- CeO2 674b data: ASCII .csv format
Rietveld fits
- CIF file for CeO2 674b
- CeO2 674b Rietveld Fit Notes with GSAS/EXPGUI
- CeO2 674b Plot (image of GSAS fit)
Empty 11-BM Kapton sample capillary
- Empty Kapton Plot (jpg)
- GSAS .fxye format
- GSAS .raw format
- TOPAS .xye format
- ASCII .csv format
- Fullprof .xy format
11-BM background, air scatter only (no sample)
Note: exact background shape for 2θ < 2° may vary due to beamstop positioning. Contact 11-BM staff with questions.
- Background Air Scatter (jpg)
- GSAS .fxye format
- GSAS .raw format
- TOPAS .xye format
- ASCII .csv format
- Fullprof .xy format
NAC (Na2Ca3Al2F14)
Na2Ca3Al2F14 (NAC) is not a official SRM from NIST, but can be used as a low Z sharp line profile standard with strong peaks at lower 2theta (compared to LaB6) See [http://www.sciencedirect.com/science/article/pii/0022459688902393 JSSC Volume 76, Issue 2, October 1988, Pages 426–431]
11-BM data for NAC
Rietveld Fitting NAC
- CIF file for NAC Note: see CIF text file header for more info about NAC sample
- NAC_DataFitNotes.txt
- NAC Plot (png)
Instrument Parameter and Input Files
GSAS
On-site and Mail-in users requesting GSAS format data will receive an appropriate .prm parameter file with their data.
When using the example .prm files with SRM data above, manually modify the wavelength in the .prm file as needed.
TOPAS
11-BM data can be obtained in a TOPAS (.xye) format compatible with both professional and academic versions of the software.
TOPAS does not use an instrument parameter file like GSAS and FullProf, instead it has instrumental parameters nested within the .INP file.
The TOPAS .inp file below uses the "simple axial model" (combining a pseudo-Voigt profile with an axial divergence asymmetry correction) to fit an example LaB6 660a dataset collected at 11-BM.
Important : The .inp file provided here is meant for TOPAS in launch mode. If you are attempting to load it in project mode, it will not work. To load it in launch mode, click on Launch then Launch Kernal. Afterwards set the inp file with the corresponding menu option. If you want to see what the inp file is doing, you can open it in any text editor.
Note : is only one example of a TOPAS profile fit using the Simple_Axial_Model; your data may be best fit by an alternative profile. For details consult the .inp file and other TOPAS resources, this example kindly provided by Dr. Saul Lapidus at Argonne National Laboratory
FullProf
11-BM data can be obtained in a Fullprof (.xy) INSTRM=10 format. However, we do not provide supporting .prc or .irf files.
11-BM users may find the example files below useful when starting a FullProf refinement.
- Instrumental Resoution Function (.irf) file
- FullProf PCR input (.pcr) file
- Plot of FullProf Fit (.png)
Note: based on a refinement of LaB6 660a data; 2010-1 cycle (30 keV), kindly provided by Dr. Joel Reid at the International Centre for Diffraction Data
Please contact beamline staff if you have 11-BM instrument parameter files for other refinement software packages that you'd like to share with our users - we'd be happy to post it here. Fits using the above standard reference data would be particularly welcome
