What is the total number of Bravais lattices in the orthorhombic crystal system?

The correct option for axial distances and axial angles for hexagonal crystal system is

The relation between axis and angles $a \neq b \neq c$ and $\alpha = \gamma = 90^{\circ}, \beta \neq 90^{\circ}$ corresponds to which crystal system?

$A$ solid compound $XY$ has $NaCl$ structure. If the radius of the cation is $100 \ pm,$ the radius of the anion $(Y^-)$ will be .............. $pm$.

Identify the type of unit cell containing a single particle.

For a simple cubic crystal,the edge length is expressed as: