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phlogiston
International Hazard
Posts: 1379
Registered: 26-4-2008
Location: Neon Thorium Erbium Lanthanum Neodymium Sulphur
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Mood: pyrophoric
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A macro shot of an uranium mineral under short wave UV light.
The field of view is about 5 mm and the exposure time was 10 seconds, making this seem like a lot more than it actually is.
I found this rock in Germany a few years ago, in an old quarry from which low grade uranium ore (<0.1% U) was mined in the 60's. It registers about
4000 cpm with my Geiger-Muller tube, comparable to uranium glass.
What surprised me is that it fluoresces under short-wave UV, but not under long-wave UV. Under long-wave UV or normal light, no obvious U minerals can
be distinguished.
Still not sure exactly what the mineral is, my current best guess based on the locality and this fluorescence is metaheinrichite
(Ba(UO2)2(AsO4)2.8H2O), but regardless, I do enjoy finally being able to claim that I have
extracted a tiny but visible amount of uranium from the earth myself. I'll be adding the rock to my element/mineral collection.
[Edited on 19-7-2020 by phlogiston]
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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Belowzero
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That is some serious wallpaper quality picture, very nice!
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Fulmen
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Are you sure that's not the Andromeda strain?
We're not banging rocks together here. We know how to put a man back together.
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phlogiston
International Hazard
Posts: 1379
Registered: 26-4-2008
Location: Neon Thorium Erbium Lanthanum Neodymium Sulphur
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Mood: pyrophoric
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Belowzero, I was pleasantly surprised by the picture quality too, considering I used a 12-year old simple 'compact' camera
I'm in the market for a new camera. Any recommendations?
I'd preferably have something versatile. Sometimes I want a macro shot like I posted, but sometimes I want to zoom in on something distant, and most
often I just want to quickly take a nice, but well-focused and high-resolution picture or video of my family.
[Edited on 21-7-2020 by phlogiston]
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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violet sin
International Hazard
Posts: 1480
Registered: 2-9-2012
Location: Daydreaming of uraninite...
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I got a couple min to set up a tripod, clip on lense and my phone from the back yard. This was a few nights ago.
 
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j_sum1
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That's pretty cool, VS.
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violet sin
International Hazard
Posts: 1480
Registered: 2-9-2012
Location: Daydreaming of uraninite...
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Here are a couple from last night. Not as good, it's quit a bit dimmer now. Our sky had haze and it didn't help at all. This is 8x magnification on
top of what ever my phone does.
  
Took quit a bit of fiddling to get it right. The set up was not ideal. At one point the clip dropped my phone with lense clipped on... To concrete
on edge of pool.. happy bounce away from the water softener by my foot.
I had trouble seeing it this time. The other day it was easy to see. My 6 year old spotted it right away. Now I don't think so. Anyone have better
luck than I?
[Edited on 24-7-2020 by violet sin]
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July 23
Nothing I could get. Either I missed it or it's too dim for the tiny clip on lense.
[Edited on 24-7-2020 by violet sin]
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Herr Haber
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Err, a lot more I would say !
My hottest piece of uranium glass gives around 400 cpm
Quote: Originally posted by phlogiston  |
What surprised me is that it fluoresces under short-wave UV, but not under long-wave UV. Under long-wave UV or normal light, no obvious U minerals can
be distinguished.
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Same surprise when I asked the dentist to use his UV light.
You should watch Nile Red's video on making uranium glass if you havent already it is both interesting and surprising imho.
The spirit of adventure was upon me. Having nitric acid and copper, I had only to learn what the words 'act upon' meant. - Ira Remsen
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CharlieA
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VS: great pix! great job!
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phlogiston
International Hazard
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Location: Neon Thorium Erbium Lanthanum Neodymium Sulphur
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Mood: pyrophoric
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The number of counts is very dependent on the GM tube you use, so we probably have very different tubes. Different uranium glass too, probably.
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"If a rocket goes up, who cares where it comes down, that's not my concern said Wernher von Braun" - Tom Lehrer |
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Boffis
International Hazard
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Not for the faint hearted; 6g of diiodo-acetylene recrystallised from dichloromethane:-
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Pok
potassium Prometheus
Posts: 176
Registered: 5-12-2010
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Pure hydrogen cyanide
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j_sum1
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Looks nice inside the ampoule!
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arkoma
Redneck Overlord
Posts: 1761
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Location: On a Big Blue Marble hurtling through space
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Had a bit of NOx build up during ethyl nitrite synth.Picture does it no justice.
"We believe the knowledge and cultural heritage of mankind should be accessible to all people around the world, regardless of their wealth, social
status, nationality, citizenship, etc" z-lib
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j_sum1
Administrator
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Nice rack Arky.
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arkoma
Redneck Overlord
Posts: 1761
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ROFLMAO.
"We believe the knowledge and cultural heritage of mankind should be accessible to all people around the world, regardless of their wealth, social
status, nationality, citizenship, etc" z-lib
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DraconicAcid
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Cheapest chromatography column ever- 4 cm of calcium carbonate, using hexanes (then 9:1 hexanes/ethyl acetate) as an eluent separated carotenes from
chlorophylls perfectly.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Lion850
National Hazard
Posts: 517
Registered: 7-10-2019
Location: Australia
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Copper glycinate crystallising out on the steam bath.
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arkoma
Redneck Overlord
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working on HMTA and HCl to CH3NH2 HCl
"We believe the knowledge and cultural heritage of mankind should be accessible to all people around the world, regardless of their wealth, social
status, nationality, citizenship, etc" z-lib
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Lion850
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A cobalt glycinate salt drying on the steam bath. The few glassy crystals is probably the slight excess of glycine.
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Lion850
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Location: Australia
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Salt formed from reacting nickel carbonate with glycine crystallising out on the steam bath. Hope it stays blue as it dries!
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Lion850
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Location: Australia
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I stumbled across this website that shows pictures of many compounds. This will be a useful resource for me as I am always trying to make different
colors How accurate it is I do not know but at least for copper it seems in
the ballpark.
https://onyxmet.com/index.php?route=information/periodic_tab...
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teodor
National Hazard
Posts: 876
Registered: 28-6-2019
Location: Heerenveen
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Ammonia gas passing above lithmus solution.
 
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pneumatician
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Mood: ■■■■■■■■■■ INRI ■■■■■■■■■■ ** Igne Natura Renovatur Integra **
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Cyan copper...
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Lion850
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Posts: 517
Registered: 7-10-2019
Location: Australia
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Wet crystals of Tin ii iodide
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