Re: How much COD and PDF database gives the complete known structures?

Dear Shay, 1. If you trying to identify phases PDF is most comprehensive database for this and COD (and others) could be used to expand the search in case of negative results with PDF. 2) You are missing data that are not in COD and PDF. For example CSD data are no longer included in PDF + any

RE: How much COD and PDF database gives the complete known structures?

I agree with Alan, and may add that searching for isomorphous structures can help and happens very often. Complex anions may replace single atom anions etc. For the inorganic world I strongly recommend the Pearson Crystal Data which allows for nice combined search using for example atomic

Re: How much COD and PDF database gives the complete known structures?

At 17:12 10/01/2017 +0200, Shay Tirosh wrote: Dear retrievers I wander the followings: 1. How much COD and PDF overlaps? Indeed the answer is funny. It depends on you. How much of your own data have you sent to COD ? If zero, then there is no overlap at all, your own data will be only in PDF

Re: How much COD and PDF database gives the complete known structures?

It depends on what you want. If you want to identify a powder pattern you probably want to use the PDF, which may also help with the structure. If you want to find a particular structure, you can try COD. If you are planning a structure determination and want to be sure that it hasn't already been

RE: How much COD and PDF database gives the complete known structures?

This should be fun to watch… James P. Cline Materials Measurement Science Division National Institute of Standards and Technology 100 Bureau Dr. stop 8520 [ B113 / Bldg 217 ] Gaithersburg, MD 20899-8523USA jcl...@nist.gov (301) 975 5793 FAX (301) 975 5334 From: