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
Given, a = b ≠ c, α = β = 900, γ = 1200
This is true for hexagonal system.
Which defect causes decreases in the density of crystal?
The correct statement regarding F – centre is
Schottky defect in crystals is observed when
Frenkel defect is caused due to
An example of a non – stoichiometric compound is
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.
Amorphous substances show
(i) short and long range order
(ii) short range order
(iii) long range order
(iv) have no sharp melting point
The solid NaCl is a bad conductor of electricity since
The correct statement in the following is
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