In Sr doped Bi4V2O11 system, how can we confirm experimentally the preferential occupancy of the dopant atom either on Bi or V or both the sites?

More S. S. Danewalia's questions See All

Where and how can I get latest data on metallic implant failure in past year?

Metallic implants fail in physiological environments due to many reasons over time. I need year wise (last 5 years) data on production and failures of the metallic implants for some research...

11 December 2017 1,381 4 View

Would an iron body get more fastly attracted towards earth during free fall than non-magnetic bodies?

Earth is also magnetic. So, whether that magnetic attraction affects the free fall of magnetic and non-magnetic bodies of same mass.

10 November 2017 1,454 11 View

Can or cannot we predict everything theoretically? What are the established proofs that say universe is deterministic?

There are lots of videos and webpages on the topic whether this universe is deterministic or not. As I learned from the material available online, quantum mechanics says NO, universe cannot be...

10 November 2017 1,297 24 View

How does non-bridging oxygens (NBOs) reduce intensity of Raman bands in silicate glasses?

In our series of glasses and glass ceramics (silicate with minor alkali content), the raman spectra exhibits bands in glass-ceramics but the bands are absent in glasses. The prepared...

01 February 2016 2,940 1 View

Can someone suggest the minimum values of dielectric constant reported particularly in glasses and glass ceramics?

Low k-materials are obtained either in silica based systems or polymers and some other materials. I want to know what minimum dielectric constant has been achieved in case of glass and glass ceramics.

06 July 2015 9,512 0 View

Which SBF is most appropriate to check in-vitro bioactivity of glass-ceramics?

Glass-ceramics are generally less bioactive than their glass counterparts. A range of SBF solutions is available to check in-vitro bioactivity such as SBF,c-SBF, r-SBF, Tas-SBF, TRIS etc. Which...

03 April 2015 2,975 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Amr Mohamed Abdelghany

I think color change indicate conversion of Vanadium from one valency to another and can be indicate using optical absorption and ESR

Dominique Ectors

A rietveld refinement and difference Fourier analysis of powder diffraction data may be able to resolve the question, depending on the level of doping. The Sr replacement should be at least 1 mol% for a meaningful analysis.

Regards

Dominique

Michael Kinsler

XPS should be able to give you that information

S. S. Danewalia

Thanks Dr. A. M. Abdelghany for your kind reply. Surely, color change can indicate the valency change of the Vanadium. But again this would be indirect method to ensure the Sr position in the system. Bcs Sr can have chances to go to both V and Bi. How to resolve that?

Thanks Dominique Ectors for your kind attention. We look forward to act on your advice.

Thank you Michael Kinsler for your response. I will keep that in mind...

Ashutosh Goel

In my opinion, you should apply a combination of XPS and Rietveld refinement (on high quality XRD scans). If you have access to EXAFS/XANES, that's the best option. XPS will help you to confirm the presence/absence of Sr into your system, while Rietveld on XRD data will provide you needed information about site occupancy in crystal structure.