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warteo
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First post from me in a long time. Something very interesting too, check it out.
Two bottles, both containing quite similar looking compounds:
Change the lighting and ....
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The first photo was taken under incandescent lighting, second photo is after the globe was changed over to a CFL.
In real life it's truly startling seeing the contents of the bottle change colour before your eyes when moving it between areas with different light
sources.
On the left is Samarium acetate and at the right is Holmium acetate.
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Sulaiman
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Lovely photo's / effect.
Do you realise how much more complicated you have made life for
Periodic Table Of The Elements sample display makers ? 
CAUTION : Hobby Chemist, not Professional or even Amateur
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crystal grower
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Have not posted in a "while" but anyway,
Silicon carbide crystals on a carbon rod:
 
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MrHomeScientist
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That's awesome! Did you grow those SiC crystals yourself or how were they made?
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crystal grower
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My friend gave them to me.
They were made industrially in an electrical arc furnace where carbon is in the centre and SiO2 is put around to rise up resistance and to keep the
outer part cooler than the core. I'm not exactly sure what they are actually making but the SiC is basically an unwanted byproduct.
I have more samples and they look really cool under microscope but unfortunately my microscope is out of service atm so I can't take a better photo.
Here's another one (photo taken with a cell phone).
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symboom
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Put electricity through the silicon carbide I heard it lights up blue
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Shob dhillon
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recrystallizing some Sodium t-butoxide
Today I decided to finally purify my sodium t-butoxide using hot T-butyl alcohol, after leaving it on the shelf for a few weeks.
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mayko
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I got a big polarized screen out of a busted monitor and I've been doing some filming with it. There's too many nice stills (and video) to post
everything but here are some of my favorites:
Stress lines in gelatin:
Water and corn syrup, with a layer of heavy corn syrup at the bottom:
Corn syrup flowing over & through glass beads:
 
al-khemie is not a terrorist organization
"Chemicals, chemicals... I need chemicals!" - George Hayduke
"Wubbalubba dub-dub!" - Rick Sanchez
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crystal grower
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@Mayko Wow those are beautiful.
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crystal grower
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I've never heard about that. I'll try it.
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symboom
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Aha here is the video of silicon carbide its also used in leds
https://m.youtube.com/watch?v=MiHjPCzNxb8
https://m.youtube.com/watch?v=-b-BQZi7MvI
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LearnedAmateur
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Managed to grow this fluff ball out of the remains of nitric acid production (so about equimolar KHSO4 and KNO3 since I had a brain fart and used two
molar equivalents of the latter). A pH strip indicates that it is primarily the bisulphate, and the strange thing was that it seemed to 'walk' of its
own accord - a few smaller balls came first and then combined and migrated to the centre as the solution evaporated.
In chemistry, sometimes the solution is the problem.
It’s been a while, but I’m not dead! Updated 7/1/2020. Shout out to Aga, we got along well.
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Chemcraft
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GaCl3
Crystals of anhydrous gallium(III) chloride on the inside of the ampoule.
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Texium
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Here's a couple pictures of some methyl 2,4-diTBSOcinnamate I made at work that crystallized as beautiful opalescent crystals.
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Rhodanide
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Left: Nitrous Acid soln.
Middle: Copper (Tetra) Dichloroisocyanurate, Disodium salt
Right: Hexaammine Nickel (II) Sulfate
  
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violet sin
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So, stopped by the thrift store today on my way home from work..
 
. Pt wire hell's yeah.
I made a small coil from ~2" of wire. If you hold a lighter to it for a brief moment, then let off the butane to extinguish the flames and then just
resupply butane gas... The coil starts glowing and will eventually reignite the lighter. After just a couple times it had modified surface texture
to a somewhat gritty appearance.
Regardless, I was exceedingly pleased I spent the time to stop in there.
 
And then I went back... Gold and silver wire with ceramic coating. RTE wire element for some kind of temperature measuring device is what I'm able
to find on them.
It is such a specific form of metal, it would be foolish not to buy for the low price. I'd imagine it's not cheap new.
[Edited on 19-11-2017 by violet sin]
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j_sum1
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Score!
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LearnedAmateur
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Good old catalysis in action, I've seen similar demonstrations using methanol instead, where a heated platinum gauze is held over methanol and it
remains glowing. Neat find though, I need to get myself some Pt wire, very useful stuff.
In chemistry, sometimes the solution is the problem.
It’s been a while, but I’m not dead! Updated 7/1/2020. Shout out to Aga, we got along well.
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CaCl2
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A crystal of what I believe is cesium trisoxallatoferrate(III) dihydrate.
Probably the first pictures of the compound on internet.
It was grown in the bottom of the container, so it doesn't represent the crystal habit of the compound perfectly.
https://imgur.com/gallery/napw4
[Edited on 18-11-2017 by CaCl2]
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hissingnoise
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| Quote: | | After just a couple times it had modified surface texture to a somewhat gritty appearance. |
This effect in Pt wire is called "bambooing" and can easily be felt by rubbing a finger lengthwise on the wire...
Further heating/cooling cycles will lead to visible nodules forming along the wire with thinner areas between (as in a bamboo stem) until the wire
eventually breaks.
IIRC, there is a process to reverse the effect but its mechanism quite eludes me now.
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Chemcraft
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OsO4
Osmium tetroxide and osmium metal melted by electronic beam.
  
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Bezaleel
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Quote: Originally posted by CaCl2  | A crystal of what I believe is cesium trisoxallatoferrate(III) dihydrate.
Probably the first pictures of the compound on internet.
[Edited on 18-11-2017 by CaCl2] |
Love that! Thumbs up!
On par or better than my trisethylenediammine nickel(II) iodide crystals (regarding rarity).
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carbonium
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Well not exactly a pretty pic, but found some of these thermometer switches while cleaning out an old lab. Any idea of their value?
[Edited on 26-11-2017 by carbonium]
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Rhodanide
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Double recrystallized Nitroguanidine, formula CH4N4O2
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Hegi
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Where did you get it?
Our webpage has been shut down forever cause nobody was willing to contribute. Shame on you all!!!
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