List of top Physics Questions on Crystallography asked in IIT JAM PH

A solid with FCC crystal structure is probed using X-rays of wavelength 0.2 nm. For the crystallographic plane given by (2, 0, 0), a first-order diffraction peak is observed for a Bragg angle of \(21^\circ\). The unit cell size is ............ nm. (Round off to 2 decimal places.)

The figure below shows a cubic unit cell with lattice constant \(a\). The shaded crystallographic plane intersects the x-axis at 0.5a. The Miller indices of the shaded plane are: 

Consider the crystal structure shown in the figure, where black and grey spheres represent atoms of two different elements and \(a\) denotes the lattice constant. The Bravais lattice for this structure is: 

The location of Cs$^+$ and Cl$^-$ ions inside the unit cell of CsCl crystal is shown in the figure. The Bravais lattice of CsCl is 

Which one of the following crystallographic planes represent \( (101) \) Miller indices of a cubic unit cell? 

Sodium (Na) exhibits body-centered-cubic (BCC) crystal structure with atomic radius 0.186 nm. The lattice parameter of Na unit cell is ................... nm.
The lattice constant of NaCl crystal is $0.563$ nm. X-rays of wavelength $0.141$ nm are diffracted by this crystal. The angle at which the first order maximum occurs is .......... degrees. (Specify answer up to two digits after decimal.)
A plane in a cubic lattice makes intercepts of \( a, a/2 \) and \( 2a/3 \) with the three crystallographic axes, respectively. The Miller indices for this plane are:
A plane in a cubic lattice makes intercepts of \( a, a/2 \) and \( 2a/3 \) with the three crystallographic axes, respectively. The Miller indices for this plane are: