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Retrieving "Symmetry Axis" from the archives

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  1. Molecular Rotation

    Linked via "symmetry axis"

    Symmetrical Tops
    Symmetrical tops have two identical moments of inertia (e.g., $\text{NH}3$, $\text{CHCl}3$). The energy levels depend on $J$ and a secondary quantum number, $K$, which describes the component of the total angular momentum along the unique principal axis (the symmetry axis):
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