u/IonOrchid1

Can anyone tell me exactly what to look for to replace this watches crystal? I ordered one that I thought would be close (a DPA 4mm low dome) but it has a very different profile and I’d like to better match the previous one. It’s either a 39.6 or 39.4mm crystal

that is over 9000 CPS on this device

that is over 9000 CPS on this device

Since several people wanted to see it under natural lighting, here it is. There are a few samples that I need to print stands for still. Otherwise, the only expected changes are to add more of some elements (perhaps larger quantities, or certain isotopes), and to make doors for it along with a video display at the top.

This is a .01uCi Pb210 source, which after 2 years will have close to .01uCi Po210
This will last longer in my collection than a more pure Po210 source

At some point I’d like to also add a spark plug.
With this sample, my collection is essentially complete. There are few things I wish to add that aren’t just “more gold” or similar. So it’s a very exciting day!

I was able to carefully remount the sample onto a black background, and now the Tc is much more visible. It is a white powder scattered around the surface of the silicone.
There is more of it than just these four grains shown but it’s still very difficult to photograph

not the most visible of samples, but I simply had to have Tc. I believe the slightly darker spot in the silicone is the pertechnetate, however I’m not certain.

What I can say is it it’s very detectable with the pancake probe.

Thanks to Metallium for these
Several of these are my largest sample for their given element (like gold, iridium, rhodium) while others are now my most stable form as I didn’t own any of the lanthanides under argon.

Really wish I could take a closer reading

At around 7 bar chlorine can exist as a liquid at room temperature.

Only about 1ml of bromine. One of my favorite elements out of the 79 pure samples I own. With very gentle heat this ampoule can “rain” bromine