Question

The correct statement in the following is

Solution

Correct option is

The unit cell having crystal parameters, a = b ≠ c, α = β = 900γ = 1200 is hexagonal

 

A crystal system is hexagonal if its unit cell having a = b ≠ c axial ratio and α = β = 900, γ = 1200, axial angles.

SIMILAR QUESTIONS

Q1

Potassium fluoride has NaCl type structure. What is the distance between K+ and F- ions if cell edge is a cm?

Q2

Which defect causes decreases in the density of crystal?

Q3

The correct statement regarding F – centre is

Q4

Schottky defect in crystals is observed when

Q5

Frenkel defect is caused due to

Q6

An example of a non – stoichiometric compound is

Q7

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.

Q8

 

Amorphous substances show

(i) short and long range order

(ii) short range order

(iii) long range order

(iv) have no sharp melting point

Q9

The solid NaCl is a bad conductor of electricity since

Q10

 

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