Question

If Z is the number of atoms in the unit cell that represents the closest packing sequence …… ABC ABC …… the number of tetrahedral voids in the unit cell is equal to

Solution

Correct option is

2Z

 

Number of tetrahedral voids in the unit cell = 2 × no. of atoms

                                                                         = 2Z

SIMILAR QUESTIONS

Q1

The correct statement regarding F – centre is

Q2

Schottky defect in crystals is observed when

Q3

Frenkel defect is caused due to

Q4

An example of a non – stoichiometric compound is

Q5

A pure crystalline substance, on being heated gradually, first forms a turbid looking liquid and then the turbidity completely disappears. This behavior is the characteristic of substances forming.

Q6

 

Amorphous substances show

(i) short and long range order

(ii) short range order

(iii) long range order

(iv) have no sharp melting point

Q7

The solid NaCl is a bad conductor of electricity since

Q8

The correct statement in the following is

Q9

 

The crystal system of a compound with unit cell dimensions,

a = 0.387, b = 0.387 and c = 0.504 nm, and α = β = 900 and γ = 1200 is

Q10

In which of the following crystals alternate tetrahedral voids are occupied?