The 3 symbols give amplitudes for pairs of quantum spins to be in different quantum states. Change the magnitudes of the quantum spins and see the distributions of amplitudes for different states. For large spins the distributions become smooth and have semiclassical features.

When , , do not satisfy the triangle inequality, the spins with magnitudes j_{1} and j_{2} cannot combine to give a spin with magnitude , and all the quantum amplitudes vanish.