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mayko
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[*] posted on 26-5-2020 at 14:02


Some lovely cultures of marine fungi
(source: https://www.cell.com/current-biology/fulltext/S0960-9822(19)31100-5 )

marineFungi_large.jpg - 2.1MB




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Texium (zts16)
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[*] posted on 28-5-2020 at 10:21


Some crystals of hexamine that formed in a flask I neglected to clean for a couple weeks

AEF2BD42-F748-49CE-A22E-7A0872461597.jpeg - 385kB




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Sigmatropic
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[*] posted on 28-5-2020 at 12:51


Ammonium chloride that crystallized out beautifully overnight after postponing the wash up of this 2L seperatory funnel.

IMG_20200528_224912.jpg - 111kB

[Edited on 28-5-2020 by Sigmatropic]
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Morgan
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[*] posted on 28-5-2020 at 14:50


Those NH4Cl crystals almost look like or are reminiscent of the gradation markings on a flask. Nice straight lines and effect, something like that might be a good contender in a photo contest.
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violet sin
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[*] posted on 28-5-2020 at 16:59


F---- Yeah baby... Sorry I'm excited.

IMAG7544.jpg - 867kB

IMAG7541.jpg - 804kB

IMAG7543.jpg - 944kB

Now all the fun of coming up with the funding for measurement devices, till then, these gonna hide on a shelf.. I loved the service, wonderful and easy
USA shipping only ... http://www.minresco.com/index.html
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[*] posted on 28-5-2020 at 19:38


Some lead acetate crystals that I recently produced with some scrap lead.

IMG_20200529_092941.jpg - 2.8MB
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[*] posted on 29-5-2020 at 06:21


@violet sin; is that tyuyamunite I see at the bottom?

Now these are tyuyamunite:
Shekafter tyuyamunite insitu.jpg - 109kB
Tyuyamunite encrusted blocks underground in the Shekafter East Mine, Kirgyzstan

Shekafter tyuyamunite specimen.jpg - 87kB
Close up of a 3" specimen

:) I worked on uranium exploration for quite a few years. I even worked right next to the old Tyuya Muyun Mine near Yaravan in southern Kirgyzstan and managed to collect tyuyamunite, turanite etc from this classic site.
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[*] posted on 29-5-2020 at 08:39


A freshly cleaned fume hood, ready to be messed up again!

32BAAF27-2054-4D66-B8C8-9E44DE0EE08B.jpeg - 280kB




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violet sin
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[*] posted on 29-5-2020 at 08:55


Boffis... PRETTY, WOW!!! Yes my sample was one of the low cost Tyuyamunit samples from the link. How fantastic! You actually worked there, bet you've seen some breathtaking mineralizations.

The detection equipment is beyond me at the moment. I'm trying to figure out the best approach on a budget, to have the most situational awareness. There are some places I've found deer hunting with sulfides in quartz veins, deep black/brown colored rusty crud, and generally interesting appearance. I'd love to check them out.

California has some radioactive minerals around. Could be rewarding to check creeks and rivers near granite, for placer thorianite. Till then I'm blind to my surrounding in that regard.

I fancy the idea of making a cloud chamber, and have been reading up in the radioactive section here. Any tips or suggestions on equipment are welcome.
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[*] posted on 31-5-2020 at 02:43



Chlorophyll in acetone (visible, visible+NIR, NIR, NIR)
(I fucked up the focus while hacking the camera sensor of this phone)
20200531_122750-1.jpg - 959kB 20200531_122801-1.jpg - 995kB 20200531_122830-1.jpg - 727kB 20200531_122841-1.jpg - 777kB





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[*] posted on 31-5-2020 at 11:46


Good old Ark-In-Saw. This cloud teased me, but never actually dropped a funnel.

funnel.jpeg - 41kB




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violet sin
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[*] posted on 3-6-2020 at 15:41


I got a couple element samples, one kinda.

The TIG electrodes are 4% ThO2 instead of the normal RED tip that have 2%. Amazon purchase at a little over 50$ but ~41.25g each x 10 isn't a bad amount of sample for the price.

The 100g Gadolinium was an aliexpress purchase ~35$ after shipping/tax. There is a seller of ThO2 white as the driven snow on aliexpress... But between the mineral sample I have, couple small harbor freight TIG electrodes and the fine , shiny and richer samples ... No need to go there.

on its way still is a wish purchase of 100g Gallium for ~36$ from China. Probably take a while to get here. 1g of germanium that was only $5 but shipping brought it up to $8 and change, was not paying attention.

Also I finally got around to epoxy coating my asbestos samples. White asbestos in serpentine, so I'm pretty sure it's crysoltile. Fills all the cracks in serpentine, comes in tan/honey/light blue/white colors. Good stuff to get locked down, don't care if it downgraded the specimens. The best bleached rock, got the next batch of epoxy, which was far more yellow, and almost looks worse than the poorly cleaned rocks and clearer epoxy... A lye / peroxide mix was used. The bucket they were in gave way to sunlight and leaves fell in to get a nice adherent organic film. No acid was used.

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Ubya
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[*] posted on 3-6-2020 at 15:46


how are you going to separate the ThO2 from the tungsten? hydrogen peroxide digestion or another way?




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[*] posted on 3-6-2020 at 17:40


Ahhh, my lab has been packed up for a couple years. Once upon a time pre-children, that was my goal, I wanted the thorium dioxide out. My sample then was small and expensive. IIRC it was ~$15 for a 3 pack of thorianated tungsten TIG electrodes at harbor freight. They look like crappy little black needles and there was little to them... Returns would have been small. If I ever did dissolve one it was 40% of one rod, but I'm pretty sure it went to first attempts at NO2 via high temp arc.

Peroxide works just fine for all the incandescent filaments previously solved. I'm sure plenty of members have dissolved the TIG rods and can give you pointers.

Right now I'm far more of a collector/builder that wet chem in any sense. Expanding things for when I've more time, less worry.

1) Nope, have all the old tug rod, none was digested. Guess it was a 5 pack.

2) Potassium carbonate from years back, done here on SM from banana peels...
3) Copper sulfamate possibly Zinc contamination, but was third re-xtal after picking blue away from clear crystals.
4) potassium iron oxalate crystals from when I prepared them here years ago... Aged well with no top eh?
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[*] posted on 7-6-2020 at 09:45


Good friend gave me this jar about 6 months before he passed. Told me, "Here, can you do anything with this?". I thought he was looking for a laugh as he watched me go giddy over an empty jar. Nope, wasn't empty. :D



[Edited on 6-7-2020 by OldNubbins]

jar closed.jpg - 52kB



[Edited on 6-7-2020 by OldNubbins]

jar open.jpg - 49kB
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[*] posted on 8-6-2020 at 02:45


What's that?
(The label looks like "astanum", which is apparently not a thing)
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[*] posted on 8-6-2020 at 03:37


I think you will find it says, "Platinum".
Yum!
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[*] posted on 8-6-2020 at 04:54


To me it says clearly platinum too.
Reminds me of the "710 cap" joke :D
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[*] posted on 8-6-2020 at 07:43


I guess I have to look more closely.
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[*] posted on 8-6-2020 at 11:46


Quote: Originally posted by sciece nerd  
I guess I have to look more closely.

I got glasses a few years ago, and wow!
Didn't remembered the world to be that detailed anymore :o
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[*] posted on 15-6-2020 at 16:42


So I made some potassium bis(oxalato)cuprate(II), and got some gorgeous blue needles. I also got a bit of precipitate that looked like copper(II) hydroxide, so I added excess potassium oxalate and recrystallized that. That gave me some lighter blue, differently shaped crystals. Not sure what they are- possibly an oxalato/hydroxy complex?
Aha! According to https://www.coursehero.com/file/26392719/lab-03pdf/ , the needles are the tetrahydrate, and the blocks are the dihydrate.






[Edited on 16-6-2020 by DraconicAcid]

vialK2CuOx2a.jpg - 90kB NeedleK2CuOx2a.jpg - 99kB XtalK2CuOx2a.jpg - 81kB

[Edited on 16-6-2020 by DraconicAcid]




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[*] posted on 18-6-2020 at 13:09


These blue needles looks awesome!



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

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[*] posted on 7-7-2020 at 13:14


Interesting color I thought for a copper salt (that does not contain another metal, only copper). A dark purple copper cyanurate. Procedure was described in more detail here: http://www.sciencemadness.org/talk/viewthread.php?tid=155624



36 dried remainder 10.6g.jpg - 476kB
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[*] posted on 15-7-2020 at 14:16


KCl fractional crystallization from low sodium salt. I dissolved the salt in boiling water until it started to crystallize out added a little to dissolve it again, then I filtered the silicon dioxide additive and left it on the table to cool, and later put it in the freezer.

Gonna collect crystals, concentrate it to saturation and repeat. I suppose NaCl (30%) will also start to crystallize eventually so likely the first batch could be the only pure KCl.

kcl.jpg - 284kB
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[*] posted on 18-7-2020 at 12:23


I made some propyl po-toluate, and it seems to be crystallizing nicely (either that or, there's a lot of unreacted acid that's decided to crystallize).

propylptol.JPG - 110kB




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