Virtual Labs

Tools

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Determination of Precise Lattice Parameter of FCC and BCC phases using X-ray diffraction

Choose difficulty:

Beginner

Intermediate

Advanced

1) Which of the following is the most suitable radiation for high-precision lattice parameter measurements?

a: Cr K_α Explanation

Explanation

b: C0 K_α Explanation

Explanation

c: Cu K_α Explanation

Explanation

d: Mo K_α Explanation

Explanation

2) Sample displacement error in a Bragg–Brentano geometry mainly leads to:

a: Peak shape analysis Explanation

Explanation

b: Intensity loss Explanation

Explanation

c: Asymmetric peaks Explanation

Explanation

d: Systematic peak shift dependent on θ Explanation

Explanation

3) Which refinement method provides the most accurate lattice parameters from full XRD patterns?

a: Single-peak fitting Explanation

Explanation

b: Williamson–Hall analysis Explanation

Explanation

c: Rietveld refinement Explanation

Explanation

d: Scherrer analysis Explanation

Explanation

4) For cubic systems, the lattice parameter is most accurately obtained by:

a: Using only the (111) peak Explanation

Explanation

b: Averaging lattice parameters from all indexed peaks Explanation

Explanation

c: Using the lowest-angle peak Explanation

Explanation

d: Using uncorrected peak positions Explanation

Explanation

5) Peak asymmetry at low angles primarily affects lattice parameter determination due to:

a: Kα₁–Kα₂ splitting Explanation

Explanation

b: Axial divergence Explanation

Explanation

c: Crystallite size effects Explanation

Explanation

d: Counting statistics Explanation

Explanation

Community Links Sakshat Portal Outreach Portal FAQ: Virtual Labs

AGPL 3.0 & Creative Commons (CC BY-NC-SA 4.0)