Number of Atoms in a Unit Cell

In face centred cubic (FCC) crystal lattice, edge length is 400 pm. The diameter of greatest sphere which can be fit into the interstitial void without distortion of lattice is

A substance ${\mathrm{A}}_{\mathrm{x}}{\mathrm{B}}_{\mathrm{y}}$ crystallizes in a face centred cubic (FCC) lattice in which atoms $\text{A}$ occupy each corner of the cube and atoms $\text{B}$ occupy face centres of the cube composition of the substance ${\mathrm{A}}_{\mathrm{x}}{\mathrm{B}}_{\mathrm{y}}$ is

In a compound, atoms of an element $\mathrm{Y}$ form $\mathrm{CCP}$ lattice and those of element $\mathrm{X}$ occupies ${\frac{2}{3}}^{\mathrm{rd}}$ of the tetrahedral voids. The formula of the compound can be

The no. of particles present per BCC unit cell is :

Unit cell of a metal has edge length of $288 \mathrm{pm}$ and density of $7.86 \mathrm{g} {\mathrm{cm}}^{–3}$. Determine the type of crystal lattice. [Atomic mass of metal $= 56 \mathrm{g} {\mathrm{mol}}^{–1}$] 

The number of atoms per unit cell of body centred cube is: 

The total number of body centred lattices possible among the $14$ Bravais lattices is

The edge length of face centred cubic unit cell is $508 \mathrm{pm}$. If the radius of the cation is $110 \mathrm{pm}$, the radius of the anion is

ABCABC arrangement packing efficiency in face centred cubic lattice is $100\%$.

Explain how much portion of an atom located at:

Body centre of a cubic unit cell is part of its neighbouring unit cell.

Explain how much portion of an atom located at: 

Corner?  

How will you distinguish between the following pairs of terms? 

Face centred and body centred cubic cell. 

How many lattice points are in unit cells of following lattice? 

Body centred. 

How many lattice points are in unit cells of following lattice? 

Face centred tetrahedral

An ionic compound ${\mathrm{A}}_{\mathrm{x}}{\mathrm{B}}_{\mathrm{y}}$ occurs in fcc type crystal structure with $\mathrm{B}$ ion at the centre of each face and $\mathrm{A}$ ion occupying corners of the cube. Give the formula ${\mathrm{A}}_{\mathrm{x}}{\mathrm{B}}_{\mathrm{y}}$.

A compound formed by elements $\mathrm{A}$ and $\mathrm{B}$ crystallizes in the cubic where $\mathrm{A}$ atoms are at the corners of the cube and $\mathrm{B}$ are at the face centres. The formula of compound is :

Give the number of lattice points in one unit cell of the crystal structures.

Face centered tetragonal

Give the number of lattice points in one unit cell of the crystal structures.

Body centered cubic