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    reps.odt


    Hi, basically I need to know why A1 is the symmetric stretch and B2 is asymmetric.
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    (Original post by franniexo)
    reps.odt


    Hi, basically I need to know why A1 is the symmetric stretch and B2 is asymmetric.
    Because the transformation vectors of the moving atoms transform as that irrep under the operations of the point group.

    It's also good to look at which Cartesian functions the irreps transform as.
 
 
 
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