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Coordination Number

In a face cen...

Question

In a face centered cubic unit cell, the ratio of number of alternate tetrahedral voids to the lattice points is

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Q. The total number of tetrahedral voids in face centered unit cell is ______.

Q. In a body cubic lattice of atom, the number of tetrahedral voids completely inside the unit cell is?

Q. In diamond, carbon atom occupy FCC lattice points as well as alternate tetrahedral voids. If edge length of the unit cell is

356

pm, then the radius (in pm) of carbon atom is:

Q. The number of tetrahedral voids in the unit cell of a fcc lattice of similar atoms is

In which of the following structures coordination number for cations and anions in the packed structure will be same ?

(a) $C l^{-}$ ions form fcc lattice and $N a^{+}$ ions occupy all octahedral voids of the unit cell

(b) $C a^{2 +}$ ions form fcc lattice and $F^{-}$ ions occupy all the eight tetrahedral voids of the unit cell

(c) $O^{2 -}$ ions form fcc lattice and $N a^{+}$ ions occupy all the eight tetrahedral voids of

(d) $S^{2 -}$ ions form fcc lattice and $Z n^{2 +}$ ions go into alternate tetrahedral voids of the unit cell

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