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woelen
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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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Piroz
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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.
[Edited on 20-1-2021 by Piroz]
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arkoma
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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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Lion850
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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)
This file has been downloaded 177 times
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woelen
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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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Piroz
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Manganese sulfate crystal.
 
[Edited on 14-2-2021 by Piroz]
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Lion850
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Piroz the crystal looks beautiful.
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Lion850
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Orange tin iodide (I assume) forming around the tin granules.
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Sulaiman
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Beautiful !
How long did it take to grow ?
CAUTION : Hobby Chemist, not Professional or even Amateur
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Piroz
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2 or 3 weeks.
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Lion850
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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]
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arkoma
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Homemade furnace temp..................
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Mark Twain |
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itsallgoodjames
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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
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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Bezaleel
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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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Bezaleel
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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]
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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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Lion850
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Hi Bezaleel the full report is here
http://www.sciencemadness.org/talk/viewthread.php?tid=156987...
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Lion850
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My wife needed a new vase....the Great Dane approved 
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j_sum1
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She is not approving the vase. She is sitting by the fridge wondering when her next chicken is arriving.
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B(a)P
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Over fill protection and everything!
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arkoma
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azeotropin HNO3[/
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]
| Quote: | Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts.
Mark Twain |
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j_sum1
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20 ampoules of cobalt chloride solutoin ready to be sent out to my students for equilibrium exeriments (adjusting temperature in a closed system).
![IMG20210618211811[1].jpg - 2.8MB](https://www.sciencemadness.org/whisper/files.php?pid=661855&aid=89069)
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Lion850
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Wet remainder that should be a cobalt glutamate compound (I think).
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Lion850
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A chocolate coloured compound
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j_sum1
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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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arkoma
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Nitric Acid!
A little while further in I'm getting this lovely clear azeotrope.
*edit* added update
[Edited on 7-11-2021 by arkoma]
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Mark Twain |
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