Calculate the volume of unit cell if an element having molar mass $$56 \mathrm{~g} \mathrm{~mol}^{-1}$$ that forms bcc unit cells.

$$\left[\rho \cdot \mathrm{N}_{\mathrm{A}}=4.8 \times 10^{24} \mathrm{~g} \mathrm{~cm}^{-3} \mathrm{~mol}^{-1}\right]$$

In an ionic crystalline solid, atoms of element Y forms hcp structure. The atoms of element X occupy one third of tetrahedral voids. What is the formula of compound?

What is total number of crystal systems associated with 14 Bravais lattices?

Which statement from following about nano-material is NOT correct?