You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Crystal Lattice and Unit Cell

in a hypoteth...

Question

in a hypotethical solid , C atoms form CCP lattice with A atoms occupying all the tetrahedral voids and B atoms occupying all the octahedral voids . A and B atoms are of the appropriate size such that there is no distoration in the ccp lattice . Now if a plane is cut diagonally of the cube then type of voids & there no.s which are present at the cross section would be ??

Open in App

Solution

If a plane is cut diagonally of the cube, it will result in a hexagonal cross section.The number of spheres in a unit cell of hexagonal close packing is 2.Therfore, the number of octahedral voids in HCP unit cell will be 2 and number of tetrahedral voids will be 4.

Suggest Corrections

Similar questions

Q. A crystalline solid is made of X, Y and Z. Atoms of X are present in ccp lattice; Y occupies all the octahedral voids and Z occupies all the tetrahedral voids. If all atoms along one body diagonal are removed then the simplest formula of solid will be:

Q. A crystalline solid is made of

X, Y

and

Z

. Atoms of

X

are present in

c c p

lattice;

Y

occupies all the octahedral voids and

Z

occupies all the tetrahedral voids. If all atoms along with body diagonal are removed, then the formula of solid will be :

(1)

X_{5} Y_{4} Z_{8}

(2)

X_{8} Y_{4} Z_{5}

(3)

X_{2} Y Z_{2}

(4)

X Y Z_{2}

Q. The structure of a crystalline lattice

A B

is rock salt type where

B

atoms are occupying all the

C C P

positions but A atoms are occupying all the octahedral voids-

The structure of a crystalline lattice AB is rock salt type where B atom is occupying all the CCP positions but A atoms are occupying all the octahedral voids.

Q. A solid has three types of atoms

X, Y

and

Z

X

forms an

F C C

lattice with

Y

atoms occupying all the tetrahedral voids and

Z

atoms occupying half of the octahedral voids. The formula of the solid is

Join BYJU'S Learning Program