Cubane Clusters Containing Lanthanide Ions:  (py)<sub>8</sub>Yb<sub>4</sub>Se<sub>4</sub>(SePh)<sub>4</sub> and (py)<sub>10</sub>Yb<sub>6</sub>S<sub>6</sub>(SPh)<sub>6</sub> FreedmanDeborah MelmanJonathan H. EmgeT. J. BrennanJ. G. 1998 Cubane Clusters Containing Lanthanide Ions:  (py)<sub>8</sub>Yb<sub>4</sub>Se<sub>4</sub>(SePh)<sub>4</sub> and (py)<sub>10</sub>Yb<sub>6</sub>S<sub>6</sub>(SPh)<sub>6</sub>