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Author: Subject: Pretty Pictures (2)
Lion850
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[*] posted on 26-10-2020 at 20:08


Hi CharlieA I paid Australian $30 for 500g thiourea (old stock). As far as I know the supplier I got this from does not ship overseas. Is thiourea hard to get in the US?
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Bmoore55
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[*] posted on 26-10-2020 at 20:47
SEM images of dendrites


Some really pretty dendrites taken from a sample submitted to my lab.

8767BED2-CB89-4357-878E-3C372DEA42ED.jpeg - 289kB
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Bedlasky
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[*] posted on 27-10-2020 at 20:02


Quote: Originally posted by CharlieA  
[rquote=647265&tid=26378
...I visited the supplier yesterday to get some thiourea... ...
[/rquote]

Out of curiosity, what would 10-50g of thiourea, shipped to the US, cost?


If you have access to ammonium thiocyanate, you can make thiourea by thermal decomposition of NH4SCN.

For test tube complex chemistry can be also used solution for cleaning silver which often contains thiourea.




If you are interested in aqueous inorganic chemistry look at https://colourchem.wordpress.com/main-page/

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Lion850
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[*] posted on 27-10-2020 at 20:53


Something yellow-ish crystallising out of the red methanol solution as it slowly evaporates.

9D4F11B5-1713-4F7B-B104-DE3D007AB31F.jpeg - 2.5MB
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Bedlasky
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[*] posted on 27-10-2020 at 21:03


What compound is that?



If you are interested in aqueous inorganic chemistry look at https://colourchem.wordpress.com/main-page/

"An old friend once told me something that gave me great comfort. Something he had read. He said that Mozart, Beethoven and Chopin never died. They simply became music." Dr. Robert Ford, Westworld
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Lion850
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[*] posted on 27-10-2020 at 21:49


Bedlasky it is an attempt to make nitratopentakis-tiokarbamatbismuth(III) nitrate [Bi(NO3)(CS(NH2)2)5](NO3)2. Thank heavens for copy and paste!

It is mentioned on the crystal growing wiki here:
https://en.m.crystalls.info/Nitratopentakis-tiokarbamatbismuth(III)_nitrate

While trying to find more details about this compound on the internet (I did not find exactly what I was looking for) I saw that some bismuth complexes are made using methanol as solvent. I then did two experiments (mixing thiourea and bismuth nitrate solutions), one using water and one using methanol. Water gave a red solution, this is slowly evaporating and so far staying red. Methanol gave a bright orange solution, which slowly became darker and more black as it was exposed to air, and now as it evaporates down in is becoming redder.
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Lion850
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[*] posted on 8-11-2020 at 01:22


Potassium ferricyanide crystal, it is still growing.

9AB7762E-C074-4E09-AC20-BED67A66FF8B.jpeg - 2.6MB
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j_sum1
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[*] posted on 14-11-2020 at 02:32




IMG20201114201856.jpg - 2.7MB


Probably a failure but really interesting nonetheless.
I am attempting to produce Zn powder by elecrolysis in alkaline medium.
Anode is a cast zinc sphere. Cathode is copper sheet now thickly coated in zinc (and not powdering off like I expected.)

The blue coating on the anode I presume is copper zincate. Not required but pretty.
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MidLifeChemist
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[*] posted on 14-11-2020 at 08:41


Quote: Originally posted by j_sum1  



The blue coating on the anode I presume is copper zincate. Not required but pretty.


It looks like a deep blue death star. Very interesting!
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[*] posted on 14-11-2020 at 13:37


With the exception of the piperine, these are shots of stuff that ends up "Where Beakers Go To Sit And Get Forgot About".


Piperine
IMG_20201114_151007_332.jpg - 327kB
Should be Lead Chloride. Had a beaker with a sat solution of Copper Chloride and chunks of lead in it on shelf for a month
IMG_20201114_151403_322.jpg - 344kB
The remnants of a 1940 something Mercury Dime in HNO3. Crystals of AgNO3 hard to see.
IMG_20201114_151243_124.jpg - 301kB
Mystery products from BenzylOH and Dichromate. Been sitting on shelf forever. Smells WoNDERFUL. Cherries.
IMG_20201114_151028_364.jpg - 349kB
A steel screw in a slotion of CuSO4. Grab bag of Cu powder and Iron Sulfate I reckon
IMG_20201114_151120_198.jpg - 362kB




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[*] posted on 20-11-2020 at 10:53


I dug up my good old heating bath, and found that half of the liquor had crystallized into fancy formations. Did not know that calcium chloride can also look nice, as it's usually just caulky flakey gunk in big bags to be thrown on dirt roads.

bathpic.jpg - 234kB bathpic2.jpg - 221kB
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Fluorite
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[*] posted on 20-11-2020 at 13:02


Sodium zincate
NaOH and battery shell ugh I shouldn't touch it :(
cadmium blood test ASAP!

76949356_2174962066130897_3958102501189746688_o.jpg - 66kB
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[*] posted on 21-11-2020 at 16:33


Quote: Originally posted by Fluorite  
Sodium zincate
NaOH and battery shell ugh I shouldn't touch it :(
cadmium blood test ASAP!
:D

Enjoying the gorgeous red of bis-dimethylglyoximenickel(II), which appears to me like the colour of a raspberry-strawberry smoothie:

IMG_2923_adj_straight.JPG - 255kB

[Edited on 22-11-2020 by Bezaleel]
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greenlight
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[*] posted on 24-11-2020 at 07:55


Dirty old ice pack ammonium nitrate crystals.

[Edited on 24-11-2020 by greenlight]

Screenshot_20201124-235050_Gallery.jpg - 1.1MBScreenshot_20201124-235024_Gallery.jpg - 1.2MB




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