The structure molecules can be confirmed by using X-ray diffraction analysis, which are explained by Bragg's Law. The law states that when the x-ray is incident onto a crystal surface, its angle of incidence, will reflect back with a same angle of scattering. A first-order reflection from the {111} planes of a cubic crystal was observed at a glancing angle of 18.9° when Cu(ka) X-rays of wavelength 179 pm were used. (i) Illustrate clearly the reflection of crystal using Bragg's Law. (ii) Calculate the unit cell parameters of the crystal. Calculate the angle at which the same crystal will give a reflection from the {123} planes.
The structure molecules can be confirmed by using X-ray diffraction analysis, which are explained by Bragg's Law. The law states that when the x-ray is incident onto a crystal surface, its angle of incidence, will reflect back with a same angle of scattering. A first-order reflection from the {111} planes of a cubic crystal was observed at a glancing angle of 18.9° when Cu(ka) X-rays of wavelength 179 pm were used. (i) Illustrate clearly the reflection of crystal using Bragg's Law. (ii) Calculate the unit cell parameters of the crystal. Calculate the angle at which the same crystal will give a reflection from the {123} planes.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Kindly answer this question i, ii & iii
Transcribed Image Text:The structure molecules can be confirmed by using X-ray diffraction
analysis, which are explained by Bragg's Law. The law states that when the
x-ray is incident onto a crystal surface, its angle of incidence, will reflect
back with a same angle of scattering. A first-order reflection from the {111}
planes of a cubic crystal was observed at a glancing angle of 18.9° when
Cu(Ka) X-rays of wavelength 179 pm were used.
(i)
Illustrate clearly the reflection of crystal using Bragg's Law.
(ii)
Calculate the unit cell parameters of the crystal.
(iii)
Calculate the angle at which the same crystal will give a reflection
from the {123} planes.
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