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Texium
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I'm really surprised that you got V(II) to work just using aluminum. You didn't even have to activate it with mercury or gallium? I tried using Al/Ga
once for reducing V(III) to V(II) and that didn't even work.
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DraconicAcid
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Quote: Originally posted by zts16  | | I'm really surprised that you got V(II) to work just using aluminum. You didn't even have to activate it with mercury or gallium? I tried using Al/Ga
once for reducing V(III) to V(II) and that didn't even work. |
So was I. It didn't react at all in sulphuric acid solution, but adding a few mL of 6 M HCl got it going well.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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j_sum1
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A bit of HCl will activate your Al just nicely. Al does not like chloride ions. 
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Dwarvensilver
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I'll be interested to see pics of the crystals you manage. 
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fluorescence
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| Quote: Originally posted by zts16 | | I'm really surprised that you got V(II) to work just using aluminum. You didn't even have to activate it with mercury or gallium? I tried using Al/Ga
once for reducing V(III) to V(II) and that didn't even work. |
If you look at the picture of my V(II) two pages ago I did it the same way. Tested a lot of possible reducing agents and pH environments and finally
settled with using Aluminium. It works quite well. I think most of my reductions (Ox-states) on Youtube were done using just Acid/Base and Al foil
wrapped around a glas rod to keep it in solution. The only thing where it didnt work was for Boron from Boric Acid. I got an orange powder but never
further processed or tested it. I guess althouth from a Redox perspective this could be possible the B-O-Bonds are just too strong.
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Dmishin
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Erythritol, slow evaporation method. (the rest is here)
[Edited on 27-10-2016 by Dmishin]
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j_sum1
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Very cool. I am impressed.
I am more likely to play with xylitol though since I can easily get it. Does it also exhibit birefringence?
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Tdep
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J_sum1, you might know this but if you're chasing Erythritol, check your local Coles or Woolies: http://shop.coles.com.au/online/mobile/national/norbu-sweete... Don't believe all that 'completely natural' crap. I nitrate it directly and it
behaves well, I don't think there's much of this 'monk fruit' in there at all really
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NedsHead
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This brand of Erythritol is good too J https://www.woolworths.com.au/Shop/Browse/spreads-breakfast-...
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mayko
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To follow up on the issue of the preservation of mushroom as specimens (not for consumption):
I did a trial run preserving mushrooms under three fluids: mineral oil, isopropanol, and glycerine.
For the mineral oil I used a generic brown-white front yard mushroom. Over the course of a couple weeks submerged underneath it remained in remarkably
good condition; fine structures like the veil remained intact and the only change in shape was a slow loss of turgor. Decomposition did set in
gradually, with a brownish watery liquid oozing out of very localized points (apparently associated with clinging air bubbles), and the appearence of
fine fuzz after ~2 weeks. There didn't appear to be much discoloration but it was drab to begin with so it's hard to say.
Glycerine and rubbing alcohol, I gathered two smallish red mushrooms (Russula, I think ) . Both liquids appeared to slow or stop decomp over several weeks, but both significantly leached the pigment from the specimen
(in the alcohol it pooled at the bottom of the jar, in the glycerine it floated to the top, lol).
I have photos but they don't add much and definitely aren't pretty.
(Glycerine was an idea from an old tip I read on preserving spiders, which will shrivel if pinned like butterflies but bleach if kept in alcohol)
al-khemie is not a terrorist organization
"Chemicals, chemicals... I need chemicals!" - George Hayduke
"Wubbalubba dub-dub!" - Rick Sanchez
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Dmishin
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| Quote: Originally posted by j_sum1 | Very cool. I am impressed.
I am more likely to play with xylitol though since I can easily get it. Does it also exhibit birefringence? |
Thanks! I don't see any sign of birefringence in my xylitol samples.
By the way, here is sodium trioxalatoferrate(III). It is much more soluble than K salt. Unfortunately, crystals are not stable.
[Edited on 29-10-2016 by Dmishin]
[Edited on 29-10-2016 by Dmishin]
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Dwarvensilver
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Dmishin,
I am amazed at all the beautiful crystals you grow.
I have been trying to find a chemical that will grow clear beauties like those Erythritol, so I will try that out, thanks for the great examples for
inspiration.
I have a bag of pure saccharin, I wonder how it crystallizes. .
Here are a few of my early (lol this spring) crystals
Copper II sulfate
Potassium ferricyanide
Copper sulfate, nickel sulfate Combination
Ferrous chloride
Keep up the great work
Cheers,
Dwarven
There is nothing more useless than doing well that which need not be done at all.
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CrystalCage
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| Quote: Originally posted by Dmishin | | Quote: Originally posted by j_sum1 | Very cool. I am impressed.
I am more likely to play with xylitol though since I can easily get it. Does it also exhibit birefringence? |
Thanks! I don't see any sign of birefringence in my xylitol samples.
By the way, here is sodium trioxalatoferrate(III). It is much more soluble than K salt. Unfortunately, crystals are not stable.
[Edited on 29-10-2016 by Dmishin]
[Edited on 29-10-2016 by Dmishin] |
It seems that sodium ferrioxalate forms square and tabular crystals and potassium ferrioxalate tends to form flat, hexagonal crystals..
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crystal grower
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I was browsing through the archives of Pretty Pictures mega thread and I just want to say WOW.
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metalresearcher
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Aluminum with silver sand (i.e. rather pure SiO2) heated in an electric arc to the boiling point of aluminum (2500 C) and then allowed to cool.
Actual size: about 24x36mm.
The balls in the center are probably crystallized elemental silicon
[Edited on 2016-11-7 by metalresearcher]
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Rhodanide
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Definitely not the best quality picture by FAR, but one you might not have ever seen before. Diiodoacetylene just after formation.
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Amos
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Some large crystals of nootkatone, a naturally occurring sesquiterpene, that I grew at work as one of my own side projects! Its aroma is sharp and
assertive, reminiscent of fresh grapefruit peel. And since there wasn't a picture of it online before, I stuck it up on Wikipedia for good measure!
[Edited on 12-1-2016 by Amos]
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Hegi
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| Quote: Originally posted by Amos | Some large crystals of nootkatone, a naturally occurring sesquiterpene, that I grew at work as one of my own side projects! Its aroma is sharp and
assertive, reminiscent of fresh grapefruit peel. And since there wasn't a picture of it online before, I stuck it up on Wikipedia for good measure!
[Edited on 12-1-2016 by Amos] |
Very nice crystals. Where did you get the compound?
Our webpage has been shut down forever cause nobody was willing to contribute. Shame on you all!!!
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Amos
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| Quote: Originally posted by Hegi | | Quote: Originally posted by Amos | Some large crystals of nootkatone, a naturally occurring sesquiterpene, that I grew at work as one of my own side projects! Its aroma is sharp and
assertive, reminiscent of fresh grapefruit peel. And since there wasn't a picture of it online before, I stuck it up on Wikipedia for good measure!
[Edited on 12-1-2016 by Amos] |
Very nice crystals. Where did you get the compound? |
One of the company's biggest projects is biosynthesizing it in three steps using genetically modified yeast. They also chemically synthesize it for
research purposes, and my crystals were grown from the latter, of which we had about 2 kilos of 97% pure material in the lab freezer
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aga
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Spotted a tiny scorpion today :
It is about 8mm long and turns out to be a Book Scorpion (<i>Chelifer cancroides</i> , a type of pseudoscorpion (it has no stinging tail).
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Dwarvensilver
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Very nice Amos, I like the clarity. Have you tried to isolate one of those seeds and grow a single unit?
It amazes me as to the number of compounds that will grow amazing crystals.
Here are my latest , a couple of easy syntheses and alum, my largest alum at
80.5g
Nickel ammonium sulphate, Cobalt ammonium sulphate, and Potassium aluminum sulphate.
   
[Edited on 2016-12-3 by Dwarvensilver]
There is nothing more useless than doing well that which need not be done at all.
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Dwarvensilver
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Nice Aga,
Have to say cool and interesting but not real pretty 
I like it!
[Edited on 2016-12-3 by Dwarvensilver]
There is nothing more useless than doing well that which need not be done at all.
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aga
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... says the guy with a 'stainless' rule, which is, er, stained !
Beautiful crystals BTW.
Did it take a while to make them ?
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NedsHead
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I had an idea after watching the latest NurdRage video where he does some work with Tritium vials (https://www.youtube.com/watch?v=KKdzhPiOqqg) and my question is,
would it be possible to grow a crystal around a small vial of Tritium?
(I'm not a grower and I know little about it) but I think that would be awesome if it can be done,
I see you can get vials in white http://www.ebay.com.au/itm/Tritium-Lamp-Vial-Tube-Capsule-Tr... which would better illuminate the colour of the crystal
[Edited on 4-12-2016 by NedsHead]
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fluorescence
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Whoever saw my video on trying to make Ti(III) from Ti metal will know how little Ti(III) I actually had in the end.
So I had to do a McMurry reaction at the University and in the end hydrolyzed the rests of my reactants to yield this beautiful purple solution.
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