Chemistry - Solid State Question with Solution | TestHub

Diamond has FCC unit cell and C-atoms also occupy half of tetrahedral voids so total number of C-atoms can be find out as follows
Number of atoms$=\frac{1}{8}\times \mathrm{a}\mathrm{t}\mathrm{o}\mathrm{m}\mathrm{s }\mathrm{a}\mathrm{t }\mathrm{c}\mathrm{o}\mathrm{r}\mathrm{n}\mathrm{e}\mathrm{r}+\frac{1}{2}\times \mathrm{a}\mathrm{t}\mathrm{o}\mathrm{m}\mathrm{s }\mathrm{a}\mathrm{t }\mathrm{f}\mathrm{a}\mathrm{c}\mathrm{e}\mathrm{s}+\frac{1}{2}\mathrm{o}\mathrm{f }\mathrm{a}\mathrm{t}\mathrm{o}\mathrm{m}\mathrm{s }\mathrm{a}\mathrm{t }\mathrm{T}\mathrm{V}$
Number of atoms$=\frac{1}{8}\times 8+\frac{1}{2}\times 6+4=1+3+4=8$