1.

following is the fact about the newly discover superconductor fo C_(60) (fullerence).the alkali mental fulleride superconductor M_(3)C_(60)has a cubic closesr - packed (face0centered cubic) arrangement of nearly spherical C_(2-)^(60) anions with M^(+) cations in the holes between the larger C_(3-)^(60) ions, the holes are of two types - octahedral hoels , which are surrounded octachedralby six C_(3-)^(60) ions. tetarahedral holes , which are surrounded tetrahedrally by for C_(3-) ^(60) ions . how many C_(3-)^(60) ions , octahedral holes , and tetrachedral holesare prsent pre unit cell

Answer»

5,4,4
3,8,4
4,4,8
2,1,2

Answer :C


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