CIFs are required for those reporting new structures or refinements of the structures of known minerals. Please see guidelines at IUCr for how to prepare and check CIFs. We encourage you to also send the CIFs to the Inorganic Crystal Structure Database at ICSD (Fachinformationszentrum Karlsruhe). No matter the size of the .cif please "zip" it so it ends in .zip and use "dataset" as the type of item. If you do not have "zip" compression ability, change the .cif to .txt so the filename is "xxxxCIF.txt" and use "supplemental material" as the file type. You can always contact the editorial office for help with this upload!