4. For 0-20 x-ray diffraction (2=1.5A) from a fcc sample, if the (111) diffraction peakappears at 20-37.1º, what is the lattice constant of this sample?5. For 0-20 x-ray diffraction (λ=1.5A) from simple cubic polycrystals (a=3.5Å), howmany diffraction peaks are in the 0°<20<90° range? Give the index of the lattice foreach diffraction peak.

Answered: . For 0-20 x-ray diffraction (λ=1.5A)…

. For 0-20 x-ray diffraction (λ=1.5A) from a fcc sample, if the (111) diffraction peak appears at 20=37.1º, what is the lattice constant of this sample?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

The Space Lattice and Unit Cells

Every matter consists of atoms, molecules, and ions. If these atoms, molecules, and ions (micro-particles) are represented in a three-dimensional space-occupying certain specific points in space, then these arrangements are termed as space lattices and the specific points which are being occupied by atoms, molecules and ions are termed as lattice points. The atoms, molecules, and ions at the lattice points are generally grouped in a regular fashion and repeat periodically at the three-dimensional space.

Question

4. For 0-20 x-ray diffraction (2=1.5A) from a fcc sample, if the (111) diffraction peak
appears at 20-37.1º, what is the lattice constant of this sample?
5. For 0-20 x-ray diffraction (λ=1.5A) from simple cubic polycrystals (a=3.5Å), how
many diffraction peaks are in the 0°<20<90° range? Give the index of the lattice for
each diffraction peak.

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