Nuclear properties and synthesis of neptunium are described, with emphasis placed on the isotopes 235-239Np. The synthesis and properties of neptunium metal, alloys, and intermetallic compounds are introduced. The lecture describes neptunium compound synthesis, with resulting thermodynamic and structural properties provided. Neptunium organometallic and coordination compounds are also presented. Information on neptunium solution speciation, redox, and spectroscopy is given, with trends based on oxidation state examined. A presentation of analytical methods useful in neptunium chemistry, including Mössbauer spectroscopy, concludes the lecture. Comparisons are made with uranium chemistry to provide trends in the actinides.
I found it interesting to learn about the many analytical methods involved. Np can be analyzed by radiometric methods, spectrophotometric methods, xray, mass spec., and Moessbauer spectroscopy.
ReplyDeleteThanks for the comments. I will post the np pdf quiz later today.
ReplyDeleteThe PDF quiz for Np is posted.
ReplyDeleteIt is interesting to see that Spectroscopy has many practical usages. I learned analytic techniques such as UV-Vis in Qualitative Analysis before so its nice to see it being applied again.
ReplyDeleteAs you saw UV-Visible is great for evaluating chemical speciation.
DeleteIt was interesting to learn what Np is used for and how it is obtained.
ReplyDeletethanks for your comments.
DeleteI liked learning about the different analytical methods for Np. Like someone mentioned before I did not realize that Spectroscopy could be so helpful.
ReplyDeleteThis was another great lecture. I really enjoyed how you have broken up the explanation of different elements to tie the entire course together. It is amazing how we still do not fully understand every reaction mechanism and possible products with how much technology we have today compared to when the field began.
ReplyDeletethanks for the overview comments. I am happy to see the combination of the lectures coming together.
DeleteIt was interesting to see how uranium and neptunium are similar. It was nice seeing how the analytical techniques can help determine the oxidation state of neptunium within a sample and the review of Mossbauer at the end of this lecture made more sense to me now than when it was first introduced in the earlier lectures.
ReplyDeleteAwesome comment on the Moessbauer spectroscopy. Topic reinforcement is a terrific way of stressing a subject.
DeleteThe comments to PDF quiz 13 are posted.
ReplyDeleteNeptunium kinda oddly has a special place in my heart, as I had to write a report on it when I was still in high school. What stuck out the most to me was how Np could be in 22 different isotopes, but only two stable oxides, even though most only have a few stable, only two always surprised me a bit
ReplyDeleteThe number of Np oxides is less than U oxides, which is also an interesting fact.
ReplyDeleteI enjoyed the most learning about the usage of the UV-Visible spectroscopy and how it can help us determine the oxidation states of Np.
ReplyDeleteMossbauer spectroscopy was one of my favorite topics from the Gamma lecture. I was glad to have a chance to learn a little bit more about it.
ReplyDeleteThis lecture was interesting especially with how Np is utilized and obtained
ReplyDelete