CIFs have not to be located at the COD server side, this is the Web magic. If there is a CIF available somewhere in the Internet, the COD can provide a link to it. Thus, a minimal information can be sufficient to enter data in COD, allowing the search for cell parameters, volume, chemical formula, reference including text in publication title, authors, journal, year. Therefore, one can now deposit either CIF (preferably) or REF files to the COD.
A REF file is quite simple to build in a few seconds by a text editor. It contains 4 lines :
2- chemical formula with spaces (ex : C2 H6 O)
3- the 6 cell parameters in angstrom and degree : a b c alpha beta gamma separated by one space
4- space group in Hermann Mauguin notation, no space necessary between characters
Example for 2 entries (in blue) in the same REF file (named arbitrarily : cod35349.ref) :
A.J. Mora, A.N. Fitch, The low-temperature
crystal structure of RS-camphor, J. Solid State Chem 134 (1997) 211-214.
C. Feldmann, M. Jansen, To the knowledge of
cis-sodium hyponitrite, Z. Anorg. Allg. Chem. 623 (1997) 1803-1809.
(however, please check if the entries are not already in COD, deposited by a co-author).
Have you the permission to do so ? Is it ethical ? We at COD think definitely YES !