Comparing Bragg Reflections of Cesium, Cesium Chloride and Cesium Iodide

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Therefore, cesium iodide would have the highest scattering intensity due to having the most electrons (53) compared to cesium (55) and chlorine (17). Cesium chloride would have a higher scattering intensity compared to cesium due to the added electrons from the chloride ion. In summary, the intensities of the Bragg reflections in the x-ray diffraction patterns of cesium, cesium chloride, and cesium iodide would increase in the order of cesium, cesium chloride, cesium iodide due to the increasing number of electrons in each compound.
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captainjack2000
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Homework Statement


How would you expect the intensities of the Bragg reflections in the x-ray diffraction patterns of cesium, cesium chloride and cesium iodide to compare? (The atomic numbers of cesium, chlorine and iodine are 55, 17 and 53 respectively_


Homework Equations





The Attempt at a Solution


I am really unsure how to do this question at all. The first part of this question delt with structure factors so I know that the scattering intensity I=Io A (S)^2 where S is the structure factor. Not sure how this helps?
 
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  • #2
The structure factor is proportional to the number of electrons in the atom (or the atomic number if the atom is uncharged).
 

1. What is the purpose of comparing the Bragg reflections of cesium, cesium chloride, and cesium iodide?

The purpose of this comparison is to understand how the atomic structure of these three compounds affects their ability to diffract X-rays. By looking at the patterns of Bragg reflections, we can gain insights into the arrangement of atoms in each compound and how they interact with X-rays.

2. How do Bragg reflections occur in these compounds?

Bragg reflections occur when X-rays interact with the atoms in the crystal lattice of a compound. The X-rays are scattered in a specific direction due to the regular arrangement of atoms in the crystal lattice. This results in a distinct pattern of bright spots, known as Bragg reflections, when the X-rays are diffracted.

3. What factors affect the Bragg reflections in cesium, cesium chloride, and cesium iodide?

The main factors that affect Bragg reflections in these compounds are the atomic structure, lattice spacing, and the energy of the X-rays. The arrangement of atoms and the spacing between them determine the angles at which the X-rays will be diffracted, and the energy of the X-rays affects the intensity of the Bragg reflections.

4. How do the Bragg reflections of cesium, cesium chloride, and cesium iodide differ?

The Bragg reflections of these compounds differ in their intensity and the angles at which they occur. This is due to differences in their crystal structures and lattice spacing. Cesium chloride and cesium iodide have a simple cubic structure, while cesium has a body-centered cubic structure, resulting in different diffraction patterns.

5. What can we learn from comparing the Bragg reflections of these compounds?

By comparing the Bragg reflections, we can gain a better understanding of the atomic structure and properties of these compounds. We can also use this information to identify and differentiate between different compounds. Additionally, this comparison can provide insights into how different elements and their arrangements affect the interaction with X-rays, which can have practical applications in materials science and other fields.

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