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Description
Protective goggle!
that gem is cubic zirconia with praseodymium
that gem is cubic zirconia with praseodymium
299 nanoseconds? Good g-d. Just stab him behind the arras already and be done with it.
Actually I thought this elements series would be done long before this. More scientific minds than mine, I suppose.
Good question. Still, there are some isotopes of other elements with even shorter half-lives. The most stable isotope of astatine, astatine-210, has a half-life of 8.1 hours. Francium-223 has a half life of 22 minutes. Copernicium-285 has a half-life of just 29 seconds. Polonium-212 has a half-life of only 299 nanoseconds. Some more stable isotopes of polonium have some uses, but I don’t know of any uses for francium or copernicium.
I actually looked that up, but I didn’t see anything about praseodymium. But I’m not surprised.
Okay, so it’s in the goggles. Wasn’t sure.
I just wonder what applications the other lanthanides have. I know neodymium (And apparently samarium too) is used for magnets, but I’m not sure about the others. But for the actinides, I can definitely think of uses for uranium (nuclear power; I think neptunium and plutonium might also fit there), and americium is used in smoke detectors.
Anyway Mendeleev was not aware of the distinction between this element and neodymium when he published his 1869 periodic table, since X-ray spectroscopy hadn’t arrived with Moseley yet. Didymium - as the mixture of these elements is still called - is used in protective goggles just like how Rarity’s polishing her emerald here.
The description says it’s a cubic zirconia gem containing praseodymium. Or maybe it’s praseodymium in the goggles. I’m just wondering how the gem is levitating above the Bunsen burner.
Why is she heating that emerald?
It’s the visor, that’s what it is.