5.3. CARBON CLUSTERS
11 1
Figure 5.6. Structure of the CEO fullerene molecule.
atom it becomes electrically conducting. Figure 5.7 shows the location of the alkali
atoms in the lattice where they occupy the two vacant tetrahedral sites and a larger
octahedral site per c . 5 0 molecule. In the tetrahedral site the alkali atom has four
surrounding c 6 0 balls, and in the octahedral site there are six surrounding c 6 0
TETRAHEDRAL
SITE
Figure 5.7. Crystal lattice unit cell of Cso molecules (large spheres) doped with alkali atoms
(dark circles). [From F. J. Owens and C. P. Poole, Jr., The New Superconducfors, Plenum,
1998.1
11 1
Figure 5.6. Structure of the CEO fullerene molecule.
atom it becomes electrically conducting. Figure 5.7 shows the location of the alkali
atoms in the lattice where they occupy the two vacant tetrahedral sites and a larger
octahedral site per c . 5 0 molecule. In the tetrahedral site the alkali atom has four
surrounding c 6 0 balls, and in the octahedral site there are six surrounding c 6 0
TETRAHEDRAL
SITE
Figure 5.7. Crystal lattice unit cell of Cso molecules (large spheres) doped with alkali atoms
(dark circles). [From F. J. Owens and C. P. Poole, Jr., The New Superconducfors, Plenum,
1998.1