X-ray Fluorescence Subcommittee Minutes

X-ray Fluorescence Subcommittee
March 21, 2007
ICDD Headquarters, Conference room A
Newtown Square, PA G. Havrilla, Chairman

The meeting was called to order at 3:10 PM.

The attendance sheet was passed around for roll call. Helen McDonnell was drafted by popular acclaim to be the recorder for the minutes. The minutes of the previous meeting, March 2006, were read and approved. There was no liaison report as there were no motions for Board Action.

The mission statement has been stalled due to no focus for the XRF Subcommittee. There has been a lack of feedback from the Board about the value of the subcommittee to the ICDD.

A discussion ensued regarding the possibility of the XRF Subcommittee focusing on education instead of the PDF product. The XRF clinic and the new XRF sample preparation clinic are two existing possibilities for contributions of the subcommittee membership.

Two new workshops were discussed as possibilities: TXRF – total reflection X-ray fluorescence and micro X-ray fluorescence. A third possibility was added after the meeting adjourned on energy dispersive XRF. Mary Ann Zaitz and George Havrilla have discussed the possibility of the TXRF workshop for awhile. George will discuss the feasibility with Mary Ann and report back. As for the other workshops, George discussed with Tim Fawcett (off-line), the possibility of the Micro-X-ray Fluorescence (MXRF) workshop. There are a number of these instruments on the market with no known training courses specifically for MXRF. While the technology is similar to regular XRF, the capabilities of MXRF offer new opportunities that need specialized instructions. George noted that the energy dispersive workshops at DXC are well attended. This area may be another educational possibility for ICDD. George will explore potential market response at DXC in August.

Terry Maquire reported on the XRF clinics noting that John Anzelmo is the contact. She also reported on the sample preparation workshop. There were eight attendees which was just about the capacity for the equipment and space. Bruker supplied the instrument. This allowed the students to work on their samples and analyze them. The registration fee will be raised for the next workshop.

Paolo Scardi mentioned that Thermo sels a solid state detector for XRD which captures a small portion of an energy dispersive spectrum (EDS). He suggested that this might be useful by incorporating this elemental information into the search match. The use of the EDS for aiding the search match, although not complete, could potentially limit the possibilities for the search-match. George and Paolo discussed this potential addition to the PDF off-line. The results were an agreement between George and Paolo to do a small collaborative project where Paolo would collect a few spectra on powder samples and send them to George for analysis with his commercial EDXRF instruments for comparison. The results will be reported next spring.

A follow up to the TXRF education is that Bruker is now marketing the Picofox. They may be interested in collaborating on a training program. George will explore this with his contacts at Bruker.

Another possibility is adding some time to the existing XRF clinic for some of the new XRF specialties, like TXRF and MXRF. George will explore this with John Anzelmo and report back at the next meeting.

One comment regarding the PDF product and the inclusion of elemental information is the possibility of requiring the grant-in-aid recipients to provide elemental information with their powder diffraction data. This would be added information that the PDF would have for future products and possibly begin to add to the File for existing materials. George will discuss this issue with Tim Fawcett. Although this might create a need to increase the grant-in-aid amounts, the benefit of having the additional elemental data would enhance the data and information within the database. It would be an added benefit for the PDF.

Dave Taylor commented that as a result of the discussion, a potential mission statement looks promising. George will work on a draft for consideration at the Denver X-ray Conference.

No motions were proposed for Board Action.

The XRF Subcommittee was adjourned at 4:00 PM.

Thanks to Helen McDonnell for taking the minutes.

Minutes submitted by George J. Havrilla.