Long Yuan

10 Questions 7 Answers 0 Followers

Questions related from Long Yuan

How does EDX or EDS equiped in SEM discriminate La and Cr in the circumstance of their characteristic X-ray energy dispersive peaks nearly identical?

Recently, we measured EDX/EDS of LaCrO3 crystals synthesized by hydrothermal method, and found that the characteristic energy for La and Cr are nearly the same for all of the noted energy levels....

03 July 2024 4,678 6 View

How to determine crystallographic site of H-atom in metal hydroxides?

Rietveld fitting method is an effective tool for determination of crystallographic site of many materials form the powder diffraction results. These materials include but not limited to oxides,...

13 December 2018 5,432 1 View

How to characterize the cluster structure of Cr3+ in aqueous solutions?

Hello everyone! I want to know the structure of chromite clusters in aqueous solutions. Is there any spectroscopic technique to determine their structures? Recently, I measured mass spectroscopy...

19 April 2017 5,038 3 View

Is there anything that shows diamagnetism at or near room temperature?

Recently, I found a compound that show room temperature diamagnetism. Is it possible a superconductor at room temperature? I need your advice on it. Thank you.

22 November 2016 5,105 7 View

The existance of NaCl in strong OH- solution in Hydrothermal condition? Is there NaCl6 clusters in above 200 oC hydrothermal condition?

Hi, world renowned scholars! I want to know the existance form of NaCl in high concentration of OH- (pH=14). Is there any experiment could do to prove or determine the existance forms: hydrated...

02 September 2016 3,114 2 View

How to determine the charge ordering type of perovskite structure manganites, such as La0.5Sr0.5MnO3, experimentally?

There seems to be 4 types of order in perovskite manganite, i.e. Type A, Type G, Type E and Type C, according to Goodenough (Physical Review, 1955, 100, 564-573). However, up to now, it seems that...

23 June 2016 1,103 4 View

Questions on small CHI**2 with large wRp and Rp in GSAS EXPGUI refinement of powder x-ray diffraction?

When I do refinement of XRD with GSAS EXPGUI, the resulted CHI**2 is 3.6, while wRp and Rp are 0.2376 and 0.1684, respectively. Why? How could the wRp and Rp could be reduced to an acceptible...

23 May 2016 6,793 10 View

How does Setting of Restraints in GSAS EXPGUI?

Dear Everyone, I read the GSAS Manual. But I cound not find setting Restraints in GSAS EXPGUI. Does the Restraints only be setted in GSAS-PC? Have you got any learning materials that can be shared...

13 May 2016 10,001 1 View

Why my EXPGUI GSAS software cannot import powder x-ray data before 10 degree?

I want to refine my powder x-ray diffraction data with GSAS software in EXPGUI. However, the data before 10 degree could not be imported into the program. I wonder that there may be something...

03 May 2016 9,558 1 View

Question about non-ferromagnetic materials attracted by magnet?

Recently, I have prepared a hydroxide sample, which could be attracted by magnet. But, the temperature dependent magnetization measurement shows that the sample is paramagnetic in the whole range...

20 February 2016 1,815 4 View