:Energy-dispersive X-ray diffraction

Image:EDXRD Schematic.png

Energy-dispersive X-ray diffraction (EDXRD) is an analytical technique for characterizing materials. It differs from conventional X-ray diffraction by using polychromatic photons as the source and is usually operated at a fixed angle.{{cite journal |last1=Kämpfe |first1=B. |last2=Luczak |first2=F. |last3=Michel |first3=B. |date=2005 |title=Energy Dispersive X-Ray Diffraction |url=https://link.springer.com/article/10.1007/BF02396775 |journal=Part. Part. Syst. Charact. |volume=22 |issue= 6|pages=391–396 |doi=10.1002/ppsc.200501007 |s2cid=97000421 |access-date=March 16, 2014}} With no need for a goniometer, EDXRD is able to collect full diffraction patterns very quickly. EDXRD is almost exclusively used with synchrotron radiation which allows for measurement within real engineering materials.{{cite web |url=http://www.diamond.ac.uk/Beamlines/Engineering-and-Environment/Techniques/EDD.html |title=Energy Dispersive Diffraction |publisher= Diamond Light Source |access-date=March 17, 2014}}

File:Sample data from an EDXRD experiment.pdf

History

EDXRD was originally proposed independently by Buras et al. and Giessen and Gordon in 1968.{{cite journal |last1=Laine |first1=E. |last2=Lähteenmäki |first2=I. |date=February 1980 |title=The energy dispersive X-ray diffraction method: annotated bibliography 1968–78 |journal=Journal of Materials Science |volume=15 |issue=2 |pages=269–277 |doi=10.1007/BF02396775 |bibcode = 1980JMatS..15..269L |s2cid=189834585 }}

Advantages

The advantages of EDXRD are (1) it uses a fixed scattering angle, (2) it works directly in reciprocal space, (3) fast collection time, and (4) parallel data collection. The fixed scattering angle geometry makes EDXRD especially suitable for in situ studies in special environments (e.g. under very low or high temperatures and pressures). When the EDXRD method is used, only one entrance and one exit window are needed. The fixed scattering angle also allows for measurement of the diffraction vector directly. This allows for high-accuracy measurement of lattice parameters. It allows for rapid structure analysis and the ability to study materials that are unstable and only exist for short periods of time. Because the whole spectrum of diffracted radiation is obtained simultaneously, it enables parallel data collection studies where structural changes can be determined over time.

Facilities

Facility	Location	Beamline	Energy range (keV)
class="wikitable"
National Synchrotron Light Source	Upton, NY	X17B1{{cite web \|url=http://beamlines.ps.bnl.gov/beamline.aspx?blid=X17B1 \|title=Beamline X17B1 \|publisher=Brookhaven National Laboratory \|access-date=March 17, 2014 \|archive-url=https://web.archive.org/web/20140318061251/http://beamlines.ps.bnl.gov/beamline.aspx?blid=X17B1 \|archive-date=March 18, 2014 \|url-status=dead }}	50–200
Advanced Photon Source	Argonne, IL	16-BM-B{{cite web \|url=http://www.aps.anl.gov/Beamlines/Directory/beamline.php?beamline_id=87 \|title=Beamline 16-BM-B: Sector 16 – Bending Magnet Beamline \|publisher=Argonne National Laboratory \|access-date=March 17, 2014 \|archive-url=https://web.archive.org/web/20140318052236/http://www.aps.anl.gov/Beamlines/Directory/beamline.php?beamline_id=87 \|archive-date=March 18, 2014 \|url-status=dead }}	10–120
German Electron Synchrotron	Hamburg, DE	P61B{{cite web \|url=https://photon-science.desy.de/facilities/petra_iii/beamlines/p61_high_energy_wiggler_beamline_lvp/p61b_large_volume_press_desy/index_eng.html \|title=P61B Large Volume Press (DESY) \|publisher=Helmholtz Association \|access-date=December 16, 2022}}	50–150
Cornell High Energy Synchrotron Source	Ithaca, NY	B1{{cite web \|url=http://www.chess.cornell.edu/chess/west/B1.htm \|title=CHESS West – B1 \|publisher=Cornell University \|access-date=March 17, 2014}}	unknown
Diamond Light Source	Oxfordshire, UK	I12{{cite web \|url=http://www.diamond.ac.uk/Home/Beamlines/I12.html \|title=I12: Joint Engineering, Environmental, and Processing (JEEP) \|publisher=Diamond Light Source \|access-date=March 17, 2014}}	50–150
SOLEIL	Paris, France	I03c{{cite web \|url=http://www.synchrotron-soleil.fr/Recherche/LignesLumiere/PSICHE \|title=PSICHÉ beamline \|publisher=Synchrotron SOLEIL – L'Orme des Merisiers Saint-Aubin \|access-date=March 17, 2014}}	15–100
Indus 2	India	BL-11{{cite journal\|last=Pandey\|first=K. K.\|display-authors=etal\|title=Energy-dispersive X-ray diffraction beamline at Indus-2 synchrotron source\|journal=Pramana\|date=April 2013\|volume=80\|issue=4\|pages=607–619\|doi=10.1007/s12043-012-0493-0\|bibcode = 2013Prama..80..607P \|s2cid=122303528}}	unknown

References

Category:Diffraction

Category:Synchrotron-related techniques