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Dilute Nd in simple cubic LaB$_6$ shows electrical resistance and specificheat features at low temperature consistent with a Kondo scale of $T_K\lesssim$ 0.3 K. Nd has a well localized {\it 4f}$^{3}$ {\it J} = 9/2 Hund'sRule configuration which is not anticipated to be Kondo coupled to theconduction electrons in LaB$_6$. We conjecture that the unexpected Kondo effectarises via participation of {\it 4f} quadrupolar degrees of freedom of the Ndcrystal field ground state quartet.

Kondo Physics in a Rare Earth Ion with Well Localized 4f Electrons