While sweeping some of my glassware with UV, one of the test tubes decided to glow a particularly lovely blue color. What might be the cause of this?
Perhaps some rare-earth contamination at the glassblower...
[Edited on 7-13-2008 by ShadowWarrior4444]not_important - 13-7-2008 at 06:30
Possibly cerium used as a decolouriser or added to make UV blocking glass.12AX7 - 13-7-2008 at 07:38
Kinda looks like electron bombardment in hard vacuum of some glass I have.
TimScienceSquirrel - 14-7-2008 at 04:16
I have some uranium glass, small pieces such as marbles and antique bead trays are readily available on eBay.
With a hand held UV lamp this is a good quickie experiment to impress after dinner as it fluoresces a beautiful light green. http://en.wikipedia.org/wiki/Uranium_glass
Most bank notes have UV markings as well and tonic water fluoresces a beautiful blue.chemkid - 14-7-2008 at 16:47
I have a whole page devoted to fluorescent items on my website (not sure how up to date it is). I really find it fascinating. Milk will fluoresce
green likely from free riboflavin and well as denatured albumin protein (scrambled eggs). Vaseline fluoresces blue/green. I should check my glassware
with my lamp!
As for mechanisms...probably rare earths, or maybe a actinides? Got a Geiger counter?
ChemkidNick F - 10-8-2008 at 05:03
Could be divalent Europium, that's a common blue phosphor.not_important - 10-8-2008 at 06:59
Cerium gives a blue-white fluorescense, and has been used in both in UV absorbing glass and to decolour glass.ycheff - 19-10-2008 at 04:12
Thulium (3+) gives blue color of luminescence.
Vanadium has absorbtion near 700-725 nm and glass has royal-blue color.
[Èçìåíåíî 19-10-2008 ... ycheff]JohnWW - 21-10-2008 at 00:45
Quote:
Originally posted by ycheffVanadium has absorbtion near 700-725 nm and glass has royal-blue color.
Royal-blue stained glass is usually made with cobalt oxide added to the melt.
