- #1
madhusoodan
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Why almost every crystal system has peak around 32 degree (2 theta) ?
XRD peak position near 32 degree
In summary, there is no clear evidence or basis to support the claim that almost every crystal system has a peak around 32 degrees (2 theta). This is an ambiguous and meaningless statement, as the angle can vary depending on the wavelength of the x-rays and the crystal structure. Additionally, the number of known crystalline materials and their distribution in space groups does not necessarily support this claim. Further research and experimentation would be needed to validate this statement.
- #2
nasu
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There are tens of thousand(s) (at least) known crystalline materials. How many of these have you checked to make the claim that "almost every crystal"?
Of course, if you make the "around" wide enough it will true for any angle.
Besides, the angle depends on the wavelength of the x-rays. Change your x-ray tube and the angles will change. So the 32 degree value cannot have any special meaning.
Of course, if you make the "around" wide enough it will true for any angle.
Besides, the angle depends on the wavelength of the x-rays. Change your x-ray tube and the angles will change. So the 32 degree value cannot have any special meaning.
- #3
- 32,820
- 4,718
madhusoodan said:
I agree with nasu. This is an ambiguous, and frankly, meaningless claim.
I did an XRD a couple of months ago on MgO. It looks almost like this:
See any 32-degree peak anywhere?
Zz.
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- #4
nasu
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@madhusoodan
I think it will be interesting to see how did you come to this impression. What systems did you study by XRD?
Maybe they all have very similar structures.
I think it will be interesting to see how did you come to this impression. What systems did you study by XRD?
Maybe they all have very similar structures.
- #5
madhusoodan
- 14
- 0
@nasu
However, all ten thousand (s) of crystalline materials fall into 230 space groups only. out of that, many systems have peaks near 32 degrees. Very less number of systems have peak in the range of 20-30.
I should not have used 'almost every'.
However, all ten thousand (s) of crystalline materials fall into 230 space groups only. out of that, many systems have peaks near 32 degrees. Very less number of systems have peak in the range of 20-30.
I should not have used 'almost every'.
- #6
nasu
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Would you care to explain how you got this idea with the 32 degree angle? Otherwise there is no base for discussion.
It's based on your own XRD measurements on some systems?
The mention of 230 space group is not relevant. They can be all cubic crystals and still have all different peaks.
It's based on your own XRD measurements on some systems?
The mention of 230 space group is not relevant. They can be all cubic crystals and still have all different peaks.
- #7
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.. or, as nasu has stated earlier, you can use the identical crystal and just change the x-ray wavelength, and the peak position changes!
@madhusoodan, have you actually performed this XRD experiment yourself?
Zz.
@madhusoodan, have you actually performed this XRD experiment yourself?
Zz.
Related to XRD peak position near 32 degree
1. What is the significance of an XRD peak position near 32 degrees?
The XRD peak position near 32 degrees indicates the presence of a specific crystalline structure in the sample being analyzed. This position corresponds to a specific angle at which X-rays are diffracted by the crystal lattice, providing information about the arrangement of atoms in the material.
2. What factors can affect the XRD peak position near 32 degrees?
The XRD peak position can be influenced by several factors, including the type of crystal structure, the orientation of the crystal lattice, and the size and shape of the crystals in the sample. Other factors such as temperature, pressure, and impurities in the sample can also affect the peak position.
3. How is the XRD peak position near 32 degrees measured and analyzed?
The XRD peak position is measured using a technique called X-ray diffraction, which involves directing a beam of X-rays at the sample and measuring the angles at which the rays are diffracted. These measurements are then used to calculate the peak position and intensity, which can provide information about the crystal structure and composition of the sample.
4. Can the XRD peak position near 32 degrees be used to identify unknown samples?
Yes, the XRD peak position can be used as a fingerprint to identify different crystalline structures and determine the composition of unknown samples. By comparing the peak position and intensity to known reference patterns, scientists can identify the type of crystal structure present in the sample.
5. How can the XRD peak position near 32 degrees be used in materials research?
The XRD peak position is a powerful tool in materials research, as it can provide information about crystal structure, phase composition, and microstructure of materials. By analyzing the peak position and intensity, scientists can gain insight into the properties and behavior of materials, which can be used to improve their performance or develop new materials with specific properties.