Question

What are the limitations for the accuracy of the values for the unit cell parameters?

(a) Lack of sufficient temperature

(b) Insufficient amount of the unit cells

(c) Shrinkage of film

(d) Lack of external pressure

This question was posed to me by my school teacher while I was bunking the class.

My doubt stems from Effect of Stress on a Powder Pattern topic in portion X-Ray Diffraction of Solid State Chemistry

Answer 1

Right answer is (c) Shrinkage of film

Easiest explanation: There are several intrinsic limitations to the accuracy of the values thus obtained-lack of the internal standard, shrinkage of film, etc. And the accuracy of axial parameters is usually to between 0.05 and 0.2 percent.