Sciencemadness Discussion Board - Pretty Pictures (2)

Pretty Pictures (2)

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Axt - 2-10-2024 at 17:51

Two separate photos taken in complete darkness, on right is a standard camera flash at lowest setting triggered by the sound of the shot. On left is the pellets hitting a sugar cube wall, the only light is being emitted is by triboluminescence which shows the shadow of the pellets as they strike.

Admagistr - 2-10-2024 at 18:08

Quote: Originally posted by Axt

Two separate photos taken in complete darkness, on right is a standard camera flash at lowest setting triggered by the sound of the shot. On left is the pellets hitting a sugar cube wall, the only light is being emitted is by triboluminescence which shows the shadow of the pellets as they strike.

That's a very interesting idea! I wonder if it would work to a lesser extent with water ice? I read somewhere that ice also exhibits triboluminescence. With such a strong pulse, even ice could show up. Lightning in a storm cloud is also related to ice formation.

chloric1 - 3-10-2024 at 03:13

Quote: Originally posted by arkoma

First go at Picric Acid.

This is why I like to visit this forum on my 65 inch smart tv! Your picnic acid looks like a magical crystal crop on some far flung planet on the edge of the universe. Reminds me, I really need to make some sodium chromate from my dichromate so I can use it for barium testing along with Epsom salts.

Morgan - 3-10-2024 at 08:08

Perhaps a solid perfectly fused plate of sugar would produce a brighter or different light show over pressed cubes?
How sugar cubes are made
https://www.youtube.com/watch?v=T3M1A-B2R-8

Axt - 3-10-2024 at 10:05

Quote: Originally posted by Admagistr

Thats actually a decent idea, I hadn't even thought of ice. I wonder if doping the solution before freezing can change its effect. I did have some large chunks of ZnS that I planned to try, probably still sitting around somewhere. They are doped with something (gold?) and phosphorescent, you'd expect a change in the wavelength between phosphorescence and triboluminescence which is mostly the result of nitrogen excitation.

Rainwater - 3-10-2024 at 10:53

Agitation during freeze also has a notable effect of the density and optical properties of water ice.
Might be worth a shot

Morgan - 4-10-2024 at 09:25

Not knowing much about the topic, but would some of these larger crystals make some sparkly effects if shattered?
https://crystalverse.com/sugar-crystals/#part2
https://www.reddit.com/r/mildlyinteresting/comments/jqxz9c/a...

Text

Axt - 4-10-2024 at 18:33

Those large crystals are actually pretty cool. I can't really predict what it would look like. Since it's photographed with an open shutter it'll capture all light that's created. Transparent crystals may just give a glowing ball or they may crack and highlight the fissures I really don't know. Pessimistic me is betting on the glowing ball though.

Morgan - 5-10-2024 at 08:52

Perhaps a powdered metal additive would be another long shot to try.
"Sugars contain many electron-rich polar groups, such as aldehyde and hydroxyl groups. When sugar comes into contact with a metal conductive layer, the volatile electrons of the metal can gather at the sugar surface, which can increase the output power of a triboelectric nanogenerator (TENG)."

Sir_Gawain - 14-10-2024 at 17:07

Comet Tsuchinshan-ATLAS

Metallophile - 15-10-2024 at 06:29

Quote: Originally posted by Sir_Gawain

Comet Tsuchinshan-ATLAS

Nice picture! This looks like the best one since Hyakutake. Interesting that the dust tail is in the opposite direction of the ion tail.

Sir_Gawain - 15-10-2024 at 07:41

Quote: Originally posted by Metallophile

Nice picture! This looks like the best one since Hyakutake. Interesting that the dust tail is in the opposite direction of the ion tail.

It is pretty spectacular; the tail spans nearly 20 degrees. I was really surprised that this photo picked up the antitail.

Cool crystal “trees”

chloric1 - 15-10-2024 at 17:15

This is the result of my byproduct of distilling nitric acid from potassium nitrate. It was wet slush at 7 am this morning and I was going to try to dry it with suction filtration and isopropyl alcohol rinse. But I came home to an alien landscape! Going to let it do its thing for a few days.

Morgan - 24-1-2025 at 09:08

Lithium tris(oxalato) ferrate chloride
Crystal shape: straight triangular prisms. Very rare shape for a crystal.
https://dmishin.github.io/crystals/lithium-ferrioxalate-chlo...

Sir_Gawain - 20-5-2025 at 21:44

Quote: Originally posted by Morgan

Lithium tris(oxalato) ferrate chloride
Crystal shape: straight triangular prisms. Very rare shape for a crystal.
https://dmishin.github.io/crystals/lithium-ferrioxalate-chlo...

Beautiful! Nice website too, that’s a lot of very good-looking crystals.

okelly4408 - 21-7-2025 at 19:57

Can't compete with a lot of these shots but I thought this was a pretty shot of my lab during a reaction. The set-up coming along!

Sir_Gawain - 21-7-2025 at 23:13

Hydrazine perchlorate

mura - 22-7-2025 at 15:25

Electrolytically grown copper crystals

pneumatician - 16-9-2025 at 15:57

Super Sol!

My copper compound collection

mura - 10-10-2025 at 19:56

From left to right:

Chevreul's salt
Copper Dichloroisocyanurate complex
Complex with glutamate
Complex with glutamate
Complex with glutamate
Copper (II) citrate
Copper (II) ibuprofenate
Copper soap
Copper (II) acetylsalycilate
Copper (II) citrate (an attempt to make anhydrous)
Basic Copper (II) Carbonate
Copper (II) diclofenac complex

[Edited on 11-10-2025 by mura]

j_sum1 - 11-10-2025 at 03:55

Mura. You did well.

mayko - 13-10-2025 at 20:17

I've got a quantity of ethylenediamine freebase which I wanted to store in a friendlier form, so I neutralized some with hydrochloric acid. I expected the reaction to be exothermic but it was still impressive to see. I didn't expect the HCl salt to form such large, chunky crystals: the one shown is more than an inch long, and some were larger. I also didn't expect it, or an oxidation byproduct, to be so strongly fluorescent under UV!

Shine On, You Crazy Diamine :cool:

gnitseretni - 26-10-2025 at 18:07

testing

Edit: it works. Finally. Been having issues with this site since forever

[Edited on 10-27-2025 by gnitseretni]

Lead iodide

currawong - 27-11-2025 at 13:59

I'm sure this has been posted many times before, but this was my first time seeing the 'golden rain' demonstration which has been on my bucket list for a long time. First time I did it I used 0.1 molar solutions of each which was clearly too concentrated to see it properly (turned solid yellow instantly) but it worked much better when I used very dilute KI. Thanks to j_sum1 for the lead nitrate.

Lead iodide

currawong - 27-11-2025 at 14:00

I'm sure this has been posted many times before, but this was my first time seeing the 'golden rain' demonstration which has been on my bucket list for a long time. First time I did it I used 0.1 molar solutions of each which was clearly too concentrated to see it properly (turned solid yellow instantly) but it worked much better when I used very dilute KI. Thanks to j_sum1 for the lead nitrate.

Lead iodide

currawong - 27-11-2025 at 14:01

I'm sure this has been posted many times before, but this was my first time seeing the 'golden rain' demonstration which has been on my bucket list for a long time. First time I did it I used 0.1 molar solutions of each which was clearly too concentrated to see it properly (turned solid yellow instantly) but it worked much better when I used very dilute KI. Thanks to j_sum1 for the lead nitrate.

j_sum1 - 27-11-2025 at 14:04

Yes. Keep concentration relatively low. Then, after the reaction, heat the solution until all the precipitate dissolves. For large floaty crystals, allow it to cool slowly.

Glad you found some goodies in that package. I has forgotten that I had some Pr6O11 and spent some time last weekend making some PrCl3, Pr2(SO4)3 and Pr(NO3)3. I may make some bromide and aspirinate because -- well, I can.

Edit
I should add, unless you like dealing with soluble lead waste, it is better to have the KI in excess. It is still good practice to filter and then treat the filtrate with carbonate to precipitate as much lead as possible to be disposed of as a solid or reclaimed.

[Edited on 27-11-2025 by j_sum1]

currawong - 27-11-2025 at 14:24

It did occur to me after I did it that it would have been better to use an excess of iodide. I already have a container for heavy metal waste that I treat with sodium carbonate though which I can put the waste solutions in. As an aside, this is actually a syllabus mandated practical but my school ignored it because the head teacher decided watching a youtube video was the same thing as doing a prac. It's really sad, the old textbooks have so many interesting demonstrations but now you get the impression the point of doing chemistry is purely to rank students and determine who will get into medicine at uni.

Thyzoid - 29-11-2025 at 10:43

Finally no more need to make my own cyanide! I can just buy it now :3

Radiums Lab - 29-11-2025 at 11:36

Quote: Originally posted by Thyzoid

Finally no more need to make my own cyanide! I can just buy it now :3

That's a boatload of cyanide. You will never need any more of it.

Thyzoid - 30-11-2025 at 00:58

Trust me. This bottle won´t even last two years. In the past two months i used up about 500g of the old cyanide in two preparations

[Edited on 30-11-2025 by Thyzoid]

bnull - 12-1-2026 at 07:37

Ammonium copper sulfate crystal, approx. 4 mm long. I didn't expect it would grow so well formed.

Texium - 12-1-2026 at 13:31

Beautiful! Think you'll keep it, or try using it as a seed for a larger crystal?

bnull - 12-1-2026 at 14:45

I'll keep it. It is perfect and grew unexpectedly in a test tube. I have more than enough seeds in another test tube just waiting to be collected and used.

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