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Old 06-22-2017, 06:35 PM #33
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Default Re: Uranium Glass

There were parts of that pdf that were unreadable. Especially the graphs. It looked like it was either old or not well documented, so I didn't take it into account at all. Couldn't make sense out of large sections.


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Old 06-22-2017, 06:44 PM #34
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Default Re: Uranium Glass

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Originally Posted by Alaskan View Post
Nice find, do I understand correctly that vaseline glass is U:Phosphate uranium doped glass?
You may find some help from results of work done here L O S A L A M O S N A T I O N A L L A B O R A T O R Y Operated by the University of California for the US Department of Energy

"The historical importance of uranyl fluorescence is not only artistic, but also scientific as well. The Canary-glass objects popular in the 19th century attracted the interest of the Scottish scholar Sir David Brewster, who mentioned the first scientific observation of visually appealing green fluorescence of uranium-containing glass in 1849. The term for this fundamental phenomenon, fluorescence, was later introduced by Sir George Gabriel Stokes in 1852 in his paper titled "The Change in the Refrangibility (wavelength) of Light." In this historic work, he described fluorescence from uranium oxide analytes.

"The intervals between the absorption bands of green uranite were nearly equal to the intervals between the bright bands of which the derived spectrum consisted in the case of yellow uranite. After having seen both systems, I could not fail to be impressed with the conviction of a most intimate connexion [sic] between the causes of the two phenomena, unconnected as at first sight they might appear. The more I examined the compounds of uranium, the more this conviction was strengthened in my mind."

This work contributed to the rule that emitted light is always of longer wavelength than that of the exciting light, a principle that is now called Stokes' Law. In modern years, fluorescence from compounds containing uranyl ions has attracted widespread attention as a tool for understanding the complex electronic structure of actinide molecules, characterizing speciation of uranium materials, and detecting the presence of uranium. Although investigations of fluorescence from other actinide species are not as extensive, reports from Russian scientists suggest that fluorescence from neptunium analytes is quite sensitive. However, the molecular composition of their neptunium samples is unknown.

Researchers at Los Alamos have discovered the first example of fluorescence from an actinyl species other than uranyl. A team led by Marianne Wilkerson and Harry Dewey of the Chemistry Division and John Berg of the Nuclear Materials Technology Division has established a capability at the Integrated Spectroscopy Laboratory to detect near-infrared photons emitted by actinide compounds following visible laser excitation. The spectra arise from a 5f-5f transition, opening up the ability to explore the electronic structure of actinide compounds in the near-infrared region of the electromagnetic spectrum by using sensitive and selective spectroscopic capabilities. This research is part of a Basic Energy Sciences (DOE BES) program to investigate chemical behavior of heavy elements." ~ see entire article here: http://www.lanl.gov/orgs/nmt/nmtdo/A.../newclass.html



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Old 06-22-2017, 07:22 PM #35
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Exclamation Re: Uranium Glass

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Originally Posted by Alaskan View Post
Nice find, do I understand correctly that vaseline glass is U:Phosphate uranium doped glass?
Uranium Dioxide was added to molten glass to make the colour yellow green.

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Old 06-22-2017, 09:27 PM #36
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Default Re: Uranium Glass

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Originally Posted by Seoul_lasers View Post
Uranium Dioxide was added to molten glass to make the colour yellow green.

100% correct Seoul_lasers

Heavy-element chemistry at Los Alamos

"The fluorescence observed following the interaction of light with actinide oxide species has fascinated people for millennia, in large part because of its visually striking effect. An artifact of yellow-colored, uranium-doped glass was found near Naples, Italy, and determined to have been made in 79 A.D. Early 19th century European glassmakers added small amounts of uranium to their glass formulations as a coloring agent to make Canary-glass objects in which the appearance is clearly enhanced by the characteristic yellow-green fluorescence. As recently as the late 1930s, uranium oxides were added to the glazes employed to decorate the brilliant red dinnerware developed by Fiestaware. Although the production of uranium glass in the United States was halted in 1942, the marvelous colors of these uranium-containing objets d’art continue to appeal to enthusiasts today"

See interesting Los Alamos take on the subject here: The Actinide Research Quarterly: 1st Quarter 2004

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Old 06-23-2017, 04:21 AM #37
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Default Re: Uranium Glass

There must have been a whole lot of this glass made for so much of it to remain today, fairly cheap on ebay, considering.
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Old 06-23-2017, 05:18 AM #38
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Default Re: Uranium Glass

You could be right. These U glass marbles have been available to anyone for years. I can't say when they were made, but they weren't expensive at all. It makes it hard to believe that it was all made prior to the 1960s or even earlier.
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Old 06-25-2017, 03:19 PM #39
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Default Re: Uranium Glass

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Originally Posted by paul1598419 View Post
It makes it hard to believe that it was all made prior to the 1960s or even earlier.
I DON'T believe that. The notion that china is selling antiques for 10 cents is absurd. But I'll change my mind if I see a source. It is more likely they are either still producing the glass, or they are using a different fluorescent material.
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Old 06-25-2017, 04:42 PM #40
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Default Re: Uranium Glass

Well... he did say it makes it hard to believe, you don't either.
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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