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GeneralF2 in Nature - Antozonite (Fluorite)
10th Jul 2012 06:11 UTCJean-Francois Carpentier Expert
Occurrence of Difluorine F2 in Nature—In Situ Proof and Quantification by NMR Spectroscopy
Dr. Jörn Schmedt auf der Günne, Martin Mangstl and Priv.-Doz. Dr. Florian Kraus
Angewandte Chemie International Edition
Article first published online: 4 JUL 2012 | DOI: 10.1002/anie.201203515
http://onlinelibrary.wiley.com/doi/10.1002/anie.201203515/abstract
10th Jul 2012 20:28 UTCRob Woodside 🌟 Manager
10th Jul 2012 20:58 UTCAlfredo Petrov Manager
10th Jul 2012 21:12 UTCRob Woodside 🌟 Manager
10th Jul 2012 21:23 UTCAlfredo Petrov Manager
10th Jul 2012 22:13 UTCRob Woodside 🌟 Manager
11th Jul 2012 01:35 UTCBart Cannon
I wonder what F2 standard was used to provide quantification of F2. via NMR.
I wonder how F2 could be distinquished from HF via NMR.
This brings up another of my complaints about NASA.
Some years ago, NASA claimed to have detected HF in the parts per trillion in the upper atmosphere, and that such a discovery proved that HFCs in the upper atmosphere was complete proof that human activity had sent HFCs into the atmosphere and was depleting the ozone layer.
Their position was that HF did not occur in nature. Any 12th grade science student would know that HF has been a standard assay subject at fumaroles for many decades.
Bart
11th Jul 2012 07:17 UTCJohn Attard Expert
It may be like counting little rocks (barely large enough to step on) close to the beach to increase the number of islands; or theologians discussing how many angels can dance on the head of a pin!
I do not think the new Fleisher should be filled with trivia. The IMA probably agrees.
11th Jul 2012 07:36 UTCBerthold Weber
I wonder how F2 could be distinquished from HF via NMR.
"The 19F NMR spectrum (Figure 2, gray spectrum) shows that inclusions of other oxidative fluorine compounds previously discussed (Table S1) are not detectable down to the noise level of the NMR experiment."
12th Jul 2012 03:26 UTCAlfredo Petrov Manager
The following reference is cited, which you probably have access to:
CRAMER, L., SCHUBERT, B., PETITE, P., LANGFORD, S., DICKINSON, J. (2005) Laser interactions with embedded Ca metal nanoparticles in single crystal CaF2, J. Appl. Phys. 97, 074307
12th Jul 2012 04:51 UTCBart Cannon
Bart
12th Jul 2012 19:34 UTCRob Woodside 🌟 Manager
12th Jul 2012 20:27 UTCAlfredo Petrov Manager
I think the implications for the serious "systematik" collectors is that they need to set a lower size boundary to the species they will collect, preferably I would think around the lower limits of observation with petrographic or ore microscopy. Attempting to assemble a large collection of invisible nanospecies would be completely ludicrous, although I'm sure a few dealers will be happy to write the names on labels.
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Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: May 10, 2024 00:12:35