> It seems Avogadro always generate cif files with “ _atom_site_Cartn_“ form. > Is there any option to save/convert it to “_atom_site_fract_“ form?
Does your system in Avogadro have a unit cell defined? If there's no unit cell information, I don't think Avogadro (or more accurately Open Babel can convert to fractional space). -Geoff
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