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Questions related from Anshul Sharma
Say I have hydroxyapatite compound, doped with cobalt. Now there are two impurity peaks which comes. The question is how to decide that this new peak correspond to this element/compound. Say for...
30 June 2025 1,172 3 View
I did Scanning electron microscopy of powder sample, of hydroxyapatite sample where its calcination temperature was 1100 degree for 12 hours. I see a majority of hexagonal shape morphology and...
29 April 2025 8,363 4 View
I did Scanning electron microscopy (SEM) and then EDX analysis of my Sr based apatite (by wet chemical route and calcined at 1100 degree for 12 hours) and expected the ratio of Sr/P to be less or...
20 April 2025 9,615 5 View
I want to resolve a issue and kind of mystery to me being a research scholar for the apatite materials. Generally apatite shows P63/m space group when we perform refinement from the XRD data. The...
10 April 2025 6,732 1 View
I have a query. We find intensity ratio for atomic % for those element where multiple oxidation states exists and also in theory too, intensity ratio rule exist for same/different n but different...
03 April 2025 1,260 3 View
I have synthesized Hydroxyapatite and Strontium Hydroxyapatite(no substitution, in pure form). In former case, there is no splitting of P2p splitting, but in later, there is a splitting. Why is...
03 April 2025 125 10 View
I am facing trouble to find bond angle for the cif uploaded below. I cant do it, like it doesn't gets selected the atoms for which I want to find the angles and instead gives me bond distances...
24 March 2025 3,527 6 View
Say my compound is M5(ABO4)3OH, where my A changes for two different element. When I do UV-Vis of it, I get the data at different absorbance intensity. So should I plot it different or in one...
23 March 2025 1,723 1 View
In the images attached below, in the high resolution mode, the P2p mode do not show the difference of 0.86 eV energy difference such that I cant explain the spin orbit doublet, and in Sr3d I see...
10 March 2025 8,377 1 View
I have a query. In most cases everyone says C 1s correction is done to avoid charging effect in all samples. But in my case for Sr5(PO4)3OH material and doped with cobalt, I have carbon 1s peaks...
05 March 2025 4,782 3 View
My query is, from XRD we get crystallite size in the order of nanometer as I have synthesized my Hydroxy-apatite from co-precipitation route from the Scherrer's formula. I did SEM analysis of a...
11 February 2025 4,755 10 View
I have made two pellets of apatite, and wanted to measure the vicker hardness data. But the issue is i am unable to see the indent mark. Is this because that the pellet is white and the optical...
29 January 2025 6,476 2 View
In my case, one expects the shift to be at higher angle as the dopant site is lower than the host, but I see is that there is a part where it goes extreme right (for undoped) then shifts...
26 December 2024 9,346 3 View
I have mad my sample where the Cobalt substitutes to the Strontium site in my sample. As Cobalt ionic radii is smaller than the Strontium, it is expected that the peaks should shift towards right...
23 September 2024 5,765 5 View
The image which I have attached, what does the red marks means and the blue ones too. Also automatically the angle also every time in each refinement get marked on its own, why so? Also I have...
13 September 2024 4,213 8 View
As I know how to do refinement of pure sample by Fullprof software, how should done perform the refinement when doping is done into the pure sample, where substitution doping occurs. My concerns...
12 September 2024 8,869 3 View
My query is how can one differentiate between grain and grain boundary contribution in the Cole-Cole plot(Z'' vs Z' plot), if we have only one semicircle formed from the plot. This is because at...
22 August 2024 3,215 2 View
I am not able to get good literature and the physics behind how first these grains and grain boundaries arises out of no where when we make a pellet to study its dielectric properties and then how...
08 August 2024 6,032 3 View
One of the papers I read by Toby, where (title of the paper was "R factors in Rietveld analysis: How good is good enough?"), he tells us that to get good chi square value, you must have low Rwp,...
18 July 2024 10,073 4 View
In dielectric, how do we know whether conduction wrt applied frequency takes place due to electron or due to a polaron. In Jonscher power law, can we distinguish whether the conduction is due to...
17 May 2024 4,154 1 View
I have synthesized strontium based hydroxy-apatite by co-precipitation process. i have done the rietveld refinement of it. The problem is its chi-square is not less than 2, even though I have...
11 May 2024 2,595 5 View
I have a query regarding how much gram to be taken when one include doping into the system to maintain the stoichiometry by co-precipitation method. My initial precursors are calcium nitrate tetra...
08 April 2024 8,665 1 View
During sintering of my 2 pellets for 12 hours at 1200 degrees on two seperate crucibles, there is a formation of green layer below the surface. I made sure to clean the crucible twice before...
19 March 2024 8,679 0 View
I have a concern regarding readjusting the intensities value of xrd data. In one the discussion in this platform, (the link is here-...
12 March 2024 7,713 1 View
I want my synthesis to be performed at a particular reaction temperature say between 60-95 degrees. I am adopting Co-precipitation process and have two initial precursors. My general doubt is, if...
05 March 2024 3,493 3 View
What does this error means in fullprof refinement process i.e. "Current parameters not saved to the current PCR file: final(Chi2) > 1.2*initial(Chi2) => Current parameters are saved in a...
13 February 2024 1,115 1 View
During the refinement process by fullprof software of my compound, it has a double phase and I got the chi square value as 1.98 of the mixture. In the output file generated, at last there is a...
08 February 2024 8,310 4 View
I have a concern regarding adding too large quantity of ammonia solution for the formation of Hydroxy-apatite. Basically I used calcium nitrate tetra-hydrate and di-ammonium hydrogen phosphate as...
23 January 2024 5,431 3 View
I am facing difficulty on removing text like XYZ.PRF:, when we run fullprof in External applications in winplotr. Is there some way to remove it?
06 December 2023 6,648 6 View
