Additional remark:

In short: The XRD pattern is the fourier transform of the radial distribution function and vice versa. So for a regular extended lattice extending some lattice constants such as it the case for crystalline/ polycrystalline material peaks in the XRD pattern pop up due to the periodicity of the radial distribution function. For amorphous material only a very local order of atoms (scatteres) is present. The fourier transform (here the XRD pattern) thus gives no distinct sharp peaks, but only one or two very broad ones. They may be stuctured by shoulders such as in the case for example of water.

Details can be found in the Hufnagel-link presented above.

Dear Srinivas,

the attached Hufagel presentation is a nice discussion of that topic:

https://www-ssrl.slac.stanford.edu/conferences/workshops/scatter2006/talks/hufnagel.pdf

Please note that according to page 3 of the presentation the q-number is:

q=4*pi*sin(theta)/lamba. So your 2*theta scale of XRD diffractograms in principle represents the q -scale used in the presentation.

Often in literature q is also given only by: q=sin(theta)/lambda with the 4*pi skipped. So please pay attention when going from theta- or 2theta-scale to the q-scale.

Good luck

If you doped a material in amorphous one then there is a probability of secondary product formation which is crystalline and small in percentage. This may cause peaks in XRD patterns which are of low intensity in high background. The no. of peaks in the patterns depends the percentage of secondary product formed.

Amorphous materials is a non-crystaline

form then accordingly there will be no XRD process. While crystaline materials will have the diffraction.

The broad peaks are representing same weak crystalline state of particles forming the amorphous state matter

Amorphous material is the collection of small nanoparticls of a range size mostly less than 10nm diameter. In this size range the particle will lose all its lattice periodicity and that accordingly doesn't produce the XRD

for more information you can see the following presentation

"Solid Surface and Nanoscale materials Structure"

Presentation · July 2016 with 142 Reads

DOI: 10.13140/RG.2.2.31947.59684

Charmo, University of Charmo, University of Salahaddin, DOI:10.13140/RG.2.2.31947.59684

Cite this publication

Omar M S at Salahaddin University - Hawler, Arbil, Kurdistan, Iraq

Omar M S

39.05Salahaddin University - Hawler, Arbil, Kurdistan, Iraq

Additional remark:

In short: The XRD pattern is the fourier transform of the radial distribution function and vice versa. So for a regular extended lattice extending some lattice constants such as it the case for crystalline/ polycrystalline material peaks in the XRD pattern pop up due to the periodicity of the radial distribution function. For amorphous material only a very local order of atoms (scatteres) is present. The fourier transform (here the XRD pattern) thus gives no distinct sharp peaks, but only one or two very broad ones. They may be stuctured by shoulders such as in the case for example of water.

Details can be found in the Hufnagel-link presented above.

In any case, what you will have to remember in the glass or an amorphous compound, you have no order. This means that there are no atoms compact planes (HKL plane) that repeat in a regular way in a three-dimensional space direction, so there are no reticular distances ( Dhkl) which separate these plans. For the X-ray diffraction spectrum of a crystal, each reticular distance is characterized by a sharp peak that indicates the order of the crystal and thus the mode of network. It should be known that the small distance between two consecutive planes remains the same. The wide peak that you usually see in a glass translates the mess in the glass and when its composition approaches the crystallized zone, we can have agglomerates of small phases in the crystallite form of small or large sizes which seem to explain the presence of two or more broad peaks!

https://www-ssrl.slac.stanford.edu/conferences/workshops/scatter2006/talks/hufnagel.pdf

Following

https://wwwssrl.slac.stanford.edu/conferences/workshops/scatter2006/talks/hufnagel.pdf