This page demonstrates some relatively new capabilities
    in Jmol relating to 
incommensurately modulated structures
    (msCIF data). Some interesting features highlighted include
    easy manipulation of data arrays for tabulation, the animated
    GIFS created using the CAPTURE command, the dynamic 
    measurements, and a few more goodies that you can find 
    in 
plott.spt. Oh -- and the modulations being visualized as 
    phased "vibrations." See 
Jmol.zip
    -- Bob Hanson Dec 12, 2013