Bravais Lattices

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

How many types of centred unit cells are there?

The correct option for the number of body centred unit cells in all $14$ types of Bravais lattice unit cells is:

The number of lattice points in an end-centred unit cell are:

How many lattice points are there in an end-centred unit cell?

Draw a schematic representation of lattice points in end-centred unit cell.

Define an end-centred unit cell.

A solid has a structure in which $\mathrm{W}$ atoms are located at the corners of a cubic lattice, $\mathrm{O}$ atom at the center of the edges and $\mathrm{Na}$ atom at centre of the cube. The formula for the compound is

In a $\mathrm{CCP}$ lattice of $\mathrm{X}$ and $\mathrm{Y}$, the $\mathrm{X}$ atoms are present at the corners, while the $\mathrm{Y}$ atoms are at the face centres. Then the formula of the compound if one of the $\mathrm{X}$ atoms from a corner is replaced by $\mathrm{Z}$atoms is (also mono-valent)?

In the cubic structure of a compound which is made from $\mathrm{X}$ and $\mathrm{Y}$, $\mathrm{X}$ atoms are at the corners of the cube and $\mathrm{Y}$ atoms are at the face centres of the cube. The molecular formula of compound is

${\mathrm{MgAl}}_2{\mathrm{O}}_4$ is found in the spinal structure, in which ${\mathrm{O}}^{2-}$ ions constitute the $\mathrm{CCP}$ lattice, ${\mathrm{Mg}}^{2+}$ ions occupy $1/8$th of the tetrahedral voids and ${\mathrm{Al}}^{3+}$ ions occupy $1/2$ of the octahedral voids. Find the total positive charge contained in one unit cell.

Which of the following are the correct axial distance and axial angles for rhombohedral system?

Choose the correct statements:

Correct relation between radius of atom and edge length in body centred cubic crystal is:

An element with density $10 \mathrm{g} {\mathrm{cm}}^{-3}$ forms a cubic unit cell with an edge length of $3 \mathrm{x} {10}^{-8} \mathrm{cm}$. What is the nature of the cubic unit cell if the atomic mass of the element is $81 \mathrm{g} {\mathrm{mol}}^{-1}$?

Give example of a compound, which forms a crystal system in which all the edges and angles are different from each other.

How cubic lattices are different from tetragonal lattices?

The percentage of an edge in a bcc unit-cell which is not covered by atoms is nearly :

Which type of crystal systems (of the following) have all their interfacial angles right angle?

The number of tetrahedral and octahedral voids in hexagonal primitive unit cell are: