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Author: Subject: Pretty Pictures (2)
j_sum1
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[*] posted on 3-3-2019 at 19:30


Lovely, Pok. Thanks for these.
(subscribed.)

[Edited on 4-3-2019 by j_sum1]
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mayko
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[*] posted on 17-3-2019 at 19:24


Quote: Originally posted by mayko  
Hot off the press, a never-before-published photograph of plutonium tetrafluoride! This was obtained by nuclear anthropologist Martin Pfeiffer via FOIA. It's a little disappointing (it is known as 'pink cake'; this is apparently misleading.) but upthread there are some very nice pictures of exotic things like plutonium trichloride
If you're on twitter and interested in nuclear history/technology/sociology, definitely check him out!



Martin has a new batch of pictures, probably the only of this plutonium compound in the public record.

PuF4.jpeg - 14kB


Announcement:
https://twitter.com/NuclearAnthro/status/1107414103499276288

More here, under My FOIA Responsive Documents/PuF4 Plutonium Tetrafluoride Pictures/
https://osf.io/46sfd/

Some chemical background:
https://www.dropbox.com/s/829rbeoruo3a78w/Preparation%20plut...





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fusso
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[*] posted on 17-3-2019 at 20:01


100%?! did they really manage to remove every atom of impurites?!:o



Useful sites:
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j_sum1
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[*] posted on 17-3-2019 at 20:42


Quote: Originally posted by fusso  
100%?! did they really manage to remove every atom of impurites?!:o
To three significant figures, why not?


Now if he had said, 100.00000000000%, I would be suspicious.
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DraconicAcid
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[*] posted on 17-3-2019 at 21:06


Quote: Originally posted by fusso  
100%?! did they really manage to remove every atom of impurites?!:o


No, they just rounded off to the nearest whole percentage.




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Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Ubya
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[*] posted on 21-3-2019 at 17:52


yesterday (a few hours ago) was my birthday, my best friend gave me this as a gift, Autunite sample, i've been looking for one one ebay for years, this made me so happy:D
(crappy photos taken with phone, i'll take better photos with a real camera in the morning, just came home after the party hahahhaa)
WhatsApp Image 2019-03-22 at 01.06.51.jpeg - 163kB WhatsApp Image 2019-03-22 at 01.05.44.jpeg - 59kB WhatsApp Image 2019-03-22 at 02.02.25.jpeg - 41kB





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crystal grower
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[*] posted on 21-3-2019 at 21:28


Wow, that's a beautiful sample, I'd love to len one, too :D.



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Tsjerk
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[*] posted on 22-3-2019 at 09:44


Quote: Originally posted by fusso  
100%?! did they really manage to remove every atom of impurites?!:o


It just means it is between 100.5% and 99.5%, obviously it can't be more than 100, so it is 99.5 or higher. Just like the other one which is between 93.5 and 94.5%.
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Chem Science
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[*] posted on 24-3-2019 at 13:11


Here's some Trifluoroacetic anhydride :D and bis(2,4,6 Tribromophenol) Oxalate :cool:

SAM_5660.JPG - 1.8MBSAM_5655.JPG - 1.8MB
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[*] posted on 26-3-2019 at 08:13


KMnO4 solution :o

[Edited on 26-3-2019 by greenlight]

Screenshot_20190326-172310_Gallery.jpg - 1.3MB

[Edited on 26-3-2019 by greenlight]




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[*] posted on 26-3-2019 at 13:51


HgCl2 after a broken mercury thermometer dissolved in an excess of HCl left for a month.

DSC_0015_1 (1).JPG - 1.6MB
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[*] posted on 27-3-2019 at 12:22


Yikes greenlight, you really should neutralize stuff like that instead of pouring straight down the drain! I know it probably wasn't much, since KMnO4's color is so intense, but in this case it's easy: just add sugar!
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TheMrbunGee
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[*] posted on 28-3-2019 at 10:40


Quote: Originally posted by MrHomeScientist  
Yikes greenlight, you really should neutralize stuff like that instead of pouring straight down the drain! I know it probably wasn't much, since KMnO4's color is so intense, but in this case it's easy: just add sugar!


It would decompose in minutes when mixing with dirty drain waters.




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Ubya
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[*] posted on 5-4-2019 at 16:54


some iodine in an evauated and sealed test tube (while cold it is transparent with solid iodine on the walls)

WhatsApp Image 2019-04-06 at 02.29.00.jpeg - 66kB





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greenlight
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[*] posted on 6-4-2019 at 10:04


Quote: Originally posted by MrHomeScientist  
Yikes greenlight, you really should neutralize stuff like that instead of pouring straight down the drain! I know it probably wasn't much, since KMnO4's color is so intense, but in this case it's easy: just add sugar!



Yeah I dont usually just pour stuff down the drain but it was a 0.02M solution and the colour is indeed intense even with very small amounts of solute.




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[*] posted on 7-4-2019 at 13:53


I found a picture from years ago from my first reaction ever, I must have had no clue what I was doing. I had seen a video showing copper sulfates reaction with bases and figured since baking soda was a base, it would react with the copper sulfate. I must have been about 12. Now that I think of it, the beautiful colors of copper compounds are really what got me interested in chemistry all of those years ago.

IMG_0876.PNG - 1.5MB

[Edited on 4-7-19 by Abromination]




List of materials made by ScienceMadness.org users:
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[*] posted on 7-4-2019 at 17:45


By-product of Neodymium Sulfate purification. Enjoy!! It was about 3" across.

IMG_20190227_171556.jpg - 3.2MB
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[*] posted on 7-4-2019 at 18:57


Quote: Originally posted by Wizzard1  
By-product of Neodymium Sulfate purification. Enjoy!! It was about 3" across.
So is it FeSO4 or Pr2(SO4)3?



Useful sites:
Balance Chemical Equation: http://www.webqc.org/balance.php
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Azeotrope table: https://en.wikipedia.org/wiki/Azeotrope_tablesIt's not crime if noone finds out - Nyaruko
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j_sum1
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[*] posted on 7-4-2019 at 20:45


Sometimes the simple things are most satisfying.

2019-04-08 14.28.50 crop.jpg - 356kB

It is nice to be back in the lab.
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[*] posted on 8-4-2019 at 07:32


Beautiful, Wizzard1! I'm quite familiar with those from all my magnet work a while back. Mine never stayed nice for long.

It's FeSO4, fusso. You get tons of it from magnet processing. Pr is in such small quantities you'd need a hell of a lot of magnets to make that much, not to mention separating and purifying it from the Nd.
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[*] posted on 21-4-2019 at 05:32


Polycrystal of 5-MeO-DMT freebase :3

351.jpeg - 743kB

This beauty weighs about 380 mg :)

Made it from melatonin (1. hydrolysis; 2. reductive amination with formaldehyde / NaBH4).


[Edited on 21-4-2019 by bipolar]
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[*] posted on 24-4-2019 at 11:05


Quote: Originally posted by bipolar  
Polycrystal of 5-MeO-DMT freebase :3



This beauty weighs about 380 mg :)

Made it from melatonin (1. hydrolysis; 2. reductive amination with formaldehyde / NaBH4).


[Edited on 21-4-2019 by bipolar]


Amazing crystal and job. Can you please provide full procedure? I would love to get back to organic chemistry as I have access to NaBH4 now. :P




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[*] posted on 7-5-2019 at 17:20


Some crystals of salicylic acid, grown from toluene/hexane. i was *trying* to make butyl salicylate, but I got these instead.

SalicAcid1.jpg - 83kB




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[*] posted on 7-5-2019 at 17:55


Are you sure that's salicylic acid? When I recrystallised some of mine, I got needle-like crystals. Admittedly, I don't recall which solvent I used.
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[*] posted on 7-5-2019 at 18:00


Quote: Originally posted by DavidJR  
Are you sure that's salicylic acid? When I recrystallised some of mine, I got needle-like crystals. Admittedly, I don't recall which solvent I used.


The melting point checked out (although I didn't do a mixed one). From water, I usually see needles.




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