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Author: Subject: Pretty Pictures (2)
woelen
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[*] posted on 19-1-2021 at 00:30


That looks really nice. I have the ZnS:Cu variation, but I did not know of the other beautifully colored phosphorescences. Maybe I should try some of these as well.



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[*] posted on 19-1-2021 at 14:14


Thanks to my stupidity nature created this.
I left glass with water outside for a moment (it was minus 12 degrees C) and a dozen hours later got back. Just forgot. However the glass didn't break.

FrozenGlass.jpg - 967kB

[Edited on 20-1-2021 by Piroz]
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[*] posted on 20-1-2021 at 01:44


Quote: Originally posted by j_sum1  
Ok. I am indpired. I am going to have tobread that procedure.


Were you necking a few tinnies^^? And thanx for posting the link to Kristof's blog. Guess I'm getting to be an "old timer" here as things slip my mind now.




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[*] posted on 4-2-2021 at 01:27


I hope it is allowed to post a video in this thread. See attached showing gallium attacking iodine. Really surprised me.

Attachment: trim.C5772431-201F-4FD0-858B-A45812C38C88.MOV (6.2MB)
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[*] posted on 5-2-2021 at 03:50


Very nice observation! Probably the combined volume of gallium + the volume of consumed solution of iodine has a slightly larger volume than the produced solution of gallium iodide, leading to slight underpressure at the place where the gallium 'eats' the iodine, leading to the attack-like behavior.



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[*] posted on 14-2-2021 at 12:43


Manganese sulfate crystal.

MnSO4_2.jpg - 752kB MnSO4_1.jpg - 455kB

[Edited on 14-2-2021 by Piroz]
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[*] posted on 14-2-2021 at 16:37


Piroz the crystal looks beautiful.
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[*] posted on 15-2-2021 at 00:10


Orange tin iodide (I assume) forming around the tin granules.

0834D1F4-836E-4A7F-A9B2-7476C5BC460C.jpeg - 1.1MB
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Sulaiman
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[*] posted on 15-2-2021 at 01:16


Quote: Originally posted by Piroz  
Manganese sulfate crystal.
Beautiful !

How long did it take to grow ?




CAUTION : Hobby Chemist, not Professional or even Amateur
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[*] posted on 15-2-2021 at 02:28


Quote: Originally posted by Sulaiman  

How long did it take to grow ?

2 or 3 weeks.
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[*] posted on 19-2-2021 at 14:06


Tin iodide crystals continue to grow. I’m not sure there is much I2 or HI left but I’ll leave it a few more days. Then to figure out how to wash them to remove residual acid. Any ideas?

Edit: The 'mounds' in the photo was the shape the crystals made as they grew from the tin granules - all the tin seems consumed now (the mounds are hollow) and there is no acid smell at all. Tomorrow I'll dry it on the steam bath and see what happens.

D5561EA2-0930-48F3-8B28-43DFFFC4E526.jpeg - 1.4MB 004DC0B3-968A-4065-89D3-D1A12BE9BFC1.jpeg - 2.2MB

[Edited on 20-2-2021 by Lion850]
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[*] posted on 28-2-2021 at 10:57




furnace temp.png - 272kB

Homemade furnace temp..................




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[*] posted on 11-3-2021 at 08:37


So I left a saturated solution of copper sulfate in a beaker for a few days with a watch glass over the top, and came back to this at the bottom of the beaker. Nice looking mistake I guess

20210309_174206.jpg - 1.9MB




Nuclear physics is neat. It's a shame it's so regulated...

Now that I think about it, that's probably a good thing. Still annoying though.
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[*] posted on 25-3-2021 at 14:35


Quote: Originally posted by Piroz  
Manganese sulfate crystal.
[Edited on 14-2-2021 by Piroz]

Looks great! The right side looks as if the crystal is hexagonal. That's a bit odd, as its crystal structure is monoclinic (I assume you have the tetrahydrate).

Is it stable in air, or do the surfaces dull over time?
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[*] posted on 25-3-2021 at 14:38


Quote: Originally posted by Lion850  
Tin iodide crystals continue to grow. I’m not sure there is much I2 or HI left but I’ll leave it a few more days. Then to figure out how to wash them to remove residual acid. Any ideas?

Edit: The 'mounds' in the photo was the shape the crystals made as they grew from the tin granules - all the tin seems consumed now (the mounds are hollow) and there is no acid smell at all. Tomorrow I'll dry it on the steam bath and see what happens.[Edited on 20-2-2021 by Lion850]

Well, what happened when you dried them?

Also, I guess that when you recrystallise them from water, they may yield larger crystals.
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[*] posted on 25-3-2021 at 22:27


Hi Bezaleel the full report is here

http://www.sciencemadness.org/talk/viewthread.php?tid=156987...

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[*] posted on 29-3-2021 at 16:16


My wife needed a new vase....the Great Dane approved :)



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[*] posted on 29-3-2021 at 18:31


She is not approving the vase. She is sitting by the fridge wondering when her next chicken is arriving.
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[*] posted on 30-3-2021 at 00:41


Quote: Originally posted by Lion850  
My wife needed a new vase....the Great Dane approved :)





Over fill protection and everything!
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[*] posted on 31-3-2021 at 23:02


azeotropin HNO3[/

2021-04-01-020048.jpg - 57kB

Who woulda thought I'd stumble in to a practically bottomless HNO3 bottle? Five gallons sulfuric (92%) and ten pounds nitrate......

been drinking coffee and running 100gm batches all night!

[Edited on 4-1-2021 by arkoma]

[Edited on 4-1-2021 by arkoma]




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[*] posted on 18-6-2021 at 03:26


20 ampoules of cobalt chloride solutoin ready to be sent out to my students for equilibrium exeriments (adjusting temperature in a closed system).


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[*] posted on 2-7-2021 at 19:18


Wet remainder that should be a cobalt glutamate compound (I think).

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[*] posted on 3-7-2021 at 19:51


A chocolate coloured compound :)

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[*] posted on 3-7-2021 at 21:52


I dried out some molecular sieves and then poured them in a flask. These dusty trails were left on the side of my evaporating dish.

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[*] posted on 10-7-2021 at 19:17


Nitric Acid!

IMG_20210710_214710892_HDR.jpg - 645kB

A little while further in I'm getting this lovely clear azeotrope.



IMG_20210710_231838491.jpg - 305kB

*edit* added update

[Edited on 7-11-2021 by arkoma]




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