Is the Isolated Pentagon Rule Merely a Suggestion for Endohedral Fullerenes? The Structure of a Second Egg-Shaped Endohedral Fullereneî—¸Gd<sub>3</sub>N@<i>C</i><sub><i>s</i></sub>(39663)-C<sub>82</sub> MercadoBrandon Q. BeaversChristine M. OlmsteadMarilyn M. ChaurManuel N. WalkerKenneth HollowayBrian C. EchegoyenLuis BalchAlan L. 2008 Is the Isolated Pentagon Rule Merely a Suggestion for Endohedral Fullerenes? The Structure of a Second Egg-Shaped Endohedral Fullereneî—¸Gd<sub>3</sub>N@<i>C</i><sub><i>s</i></sub>(39663)-C<sub>82</sub>