Energy From Thorium Discussion Forum

It is currently Jun 23, 2018 8:49 am

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: Protactinium Research
PostPosted: Nov 17, 2014 1:55 pm 
Offline
User avatar

Joined: Nov 30, 2006 3:30 pm
Posts: 3631
Location: Alabama
EXAFS Study of the Speciation of Protactinium(V) in Aqueous Hydrofluoric Acid Solutions

Quote:
The speciation of protactinium(V) in hydrofluoric acid (HF) solutions was studied using X-ray absorption spectroscopy. Extended X-ray absorption fine structure measurements were performed on an aqueous solution of 0.05 M protactinium(V) with various HF concentrations ranging from 0.5 to 27 M in order to probe the protactinium coordination sphere with respect to the identity and number of coordinating ligands. The resulting fits to the spectra suggest the presence of an eight-coordinate homoleptic fluoro complex in highly concentrated fluoride solutions (27 M), with equilibrium between seven- and eight-coordinate fluoro complexes at moderate acidities, and in more dilute solutions, results indicate that one water molecule is likely to replace a fluoride in the first coordination sphere, at a distance of 2.54–2.57 Å. Comparisons of this chemistry with group V metals, niobium and tantalum, are presented, and the potential implications for these results on the hydrolytic behavior of protactinium in aqueous systems are discussed.


Top
 Profile  
 
PostPosted: Nov 19, 2014 6:22 pm 
Offline

Joined: Jul 28, 2008 10:44 pm
Posts: 3065
Yet another completely foreign language to me at least :(


Top
 Profile  
 
PostPosted: Mar 19, 2018 9:54 am 
Offline
User avatar

Joined: Nov 30, 2006 3:30 pm
Posts: 3631
Location: Alabama
Protactinium: The element of surprise

Quote:
In a new study from the U.S. Department of Energy’s (DOE) Argonne National Laboratory and the University of Lille in France, chemists have explored protactinium’s multiple resemblances to more completely understand the relationship between the transition metals and the complex chemistry of the early actinide elements. Protactinium’s primary esteem isn’t in its business utilizes, however in giving new major experiences into the science of the elements. Protactinium is an actinide element and sits amongst thorium and uranium on the intermittent table. Be that as it may, protactinium additionally nearly looks like niobium and tantalum, both of which are change metals utilized as a part of a scope of concoction and metallurgical applications. At the point when scientists comprehend their similitudes in more detail, they may find novel but then unfamiliar applications for these and other related elements.


Protactinium and the intersection of actinide and transition metal chemistry


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group