Metals and Alloys Subcommittee Agenda and Minutes

APPROVED MINUTES
Metals and Alloys Subcommittee
March 16, 2005

Secretary's Note: It will help in understanding these minutes to know how the number of M&A entries has grown since 1998 (see the table, below). This growth drives many M&A Subcommittee activities.

Year

Approximate Number of Entries

1998

20,000

2001

30,000

2004

41,000

Today

93,600

1. Call to Order

The chairman called the meeting to order at 10 am . The agenda follows these minutes, and the attendance sheets are filed at headquarters.

2. Appointment of Secretary

Jeff Dann took notes for this meeting, and Pete Wallace wrote the minutes.

3. Approval of Minutes of March 2004

There were no changes or additions to the 2004 minutes, and they were approved as written.

4. Board of Directors Liaison Report ( Cam Hubbard)

No report was needed, since there were no M&A motions sent to the Board for approval in 2004.

5. The M&A Web Page (Camille Jones, Monika Kottenhahn, and Terry Kahmer)

Camille presented a brief overview of the web page's development as well as its contents (Attachment 1). The M&A web page has been approved by the ICDD Publication Committee for limited use and is currently available only to members of the M&A working group and ICDD staff. Monika gave a brief demonstration of the website. The site contains seven sections, and only a few of these contain all the required content.

6. The PSCI (Pearson Symbol Code Index)-II Editorial Review (Pete Wallace)

This review covers over 30,000 M&A Powder Diffraction File (PDF) entries, each of which was checked for correct prototype structure assignment and Pearson Symbol Code (PSC). Prototype structures and PSCs were assigned as appropriate. The review started several years ago, and it lacks only the review of about 600 entries to be complete. [Secretary's Note: Review of the last 600 entries was completed the following day.] The last step, the quality review, will be completed this summer.

7. The M&A Virtual Blue Book (Mike Bennett and Howard Jones)

Mike reviewed the history of the M&A blue book (published by the ICDD in 1992 as the Metals and Alloys Indexes ) and the electronic virtual blue book (VBB) Howard and Mike later created. The VBB contains all current M&A entries, including those in the editorial process, and is intended to be an editorial tool. The VBB has most of the tables of the original hardcover book, namely the Alphabetical Formula Index, the Pearson Symbol Code Index, and several tables involving prototype structure lists. The VBB does not have the Strukturbericht Symbol Index or the Common Names Index of the original blue book. The latter indexes can be added to the VBB when they are needed.

The VBB is available for M&A volunteers and ICDD staff in two formats: Adobe for perusal or html for interactive usage. The html version was demonstrated for the first time at this meeting. Chief among the features shown was the ability to jump between the various VBB tables using various links. When the bugs are removed from these links, these links will be extremely useful to M&A volunteers performing editorial reviews. In the future, these links should also enhance the ability of researchers to solve metallurgical and structural problems. Mike and Howard also noted that additional links are planned for the VBB that will allow direct access to PDF data. Some features of the VBB will be incorporated into the PDF-4 database.

8. Adoption of Linus Pauling File (LFP) Prototype Structures for the M&A Subfile (Jeff Dann and Pete Wallace)

The ICDD has approved the use of Linus Pauling File prototype structures within the PDF in addition to prototype structures currently used. Jeff gave some examples of how what we are using compares to the LPF usage (Attachment 2).

9. Assigning (LPF) prototype structures to M&A subfile entries (Pete Wallace and ICDD staff)

The M&A Subcommittee will assign LPF prototype structures to as many M&A PDF entries as possible. The following items are needed to do this:

  1. Appropriate storage locations in the editorial relational database,
  2. A lookup table that permits comparison of PDF prototype structures to those in the LPF, and
  3. An automated means of assigning the LPF prototype structures to M&A entries.

The ICDD is working on Item 1, and Pierre Villars has supplied Item 2. For Item 3, M&A volunteers are developing a flow chart describing the steps needed to identify when a match to an LPF prototype structure has been found for an PDF entry. Much more work is needed on this flow chart. M&A volunteers will review all computer-assigned LPF prototype structure assignments. [Secretary's Note: Reviewing 93,000+ prototype structure assignments will be a formidable task.]

10. M&A Calculated Pattern Round Robin (Jeff Dann)

This round robin will use Larry Calvert's powder pattern calculation test data to evaluate various powder pattern calculation programs. But before sending out the test data, Jeff and other volunteers are validating the test data. All problems that are found will be corrected before sending out the data. In the discussion that followed, Pete Wallace noted that there is an ASTM standard for round robins that may be of use to us.

11. Review of Current M&A Patterns (Pete Wallace)

All data sets sent to Pete prior to this meeting have been completed and returned to ICDD Headquarters. A new package of 153 patterns was given to Pete at this meeting.

12. New/Old Business

ICDD Headquarters has developed a computerized process for deciding which PDF entries will be in the M&A subfile. This process will be tried out shortly on a large batch of new entries, and the results checked by ICDD Headquarters and M&A volunteers.

13. Adjournment

The meeting was adjourned at 10:45 am .

Metals and Alloys Subcommittee Agenda for March 16, 2005

  1. Call to Order
  2. Appointment of Secretary
  3. Approval of Minutes of March 2004
  4. Board of Directors Liaison Report ( Cam Hubbard)
  5. The M&A Web Page (Camille Jones, Monika Kottenhahn, and Terry Kahmer)
  6. The PSCI (Pearson Symbol Code Index)-II Editorial Review (Pete Wallace)
  7. The Metals and Alloys Virtual Blue Book (VBB) (Mike Bennett and Howard Jones)
  8. Adoption of Linus Pauling File (LFP) Prototype Structures for the M&A Subfile (Jeff Dann and Pete Wallace)
  9. Assigning (LPF) prototype structures to M&A subfile entries (Pete Wallace and ICDD staff)
  10. M&A Calculated Pattern Round Robin (Jeff Dann)
  11. Review of Current M&A Patterns (Pete Wallace)
  12. New/Old Business
  13. Adjournment