Sciencemadness Discussion Board

Pretty Pictures (2)

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Bedlasky - 7-5-2019 at 19:04

Hi.

There is few photos of my crystals. The blue crystals are CuSO4.5H2O - the bigger one grew one year, maybe longer. They grew up on copper wire - it wasn't the best option, but they were my first crystals. First was gift for friend and second will be for my girlfriend :).

The violet one in transparent crystal is K(Al,Cr)(SO4)2.12H2O. It is coated by potassium alum. I made it by mixing potassium alum and chrome alum in ratio 10:1. Another gift for my friend.

The pale violet crystals are NH4Fe(SO4)2.12H2O. This two crystals are growing really fast - they are one day old and still growing in solution.

The pale violet and rusty crystals in bowl are also ammonium-ferric sulfate. After I pulled out these crystals out of solution, they were rusty (because of colour of solution) but after a some time were pale violet. Later their colour disappeared and after few hours they were rusty. This compound really quickly loses water.

The green crystals are CuCl2.2H2O. They are currently turquoise.

CuSO4 3.jpg - 36kB CuSO4 4.jpg - 55kB CuSO4 1.jpg - 281kB CuSO4 2.jpg - 240kB K(Al,Cr)(SO4)2.jpg - 382kB NH4Fe(SO4)2.jpg - 213kB

CuCl2.jpg - 512kB NH4Fe(SO4)2 - rezavy.jpg - 386kB NH4Fe(SO4)2 - fialovy.jpg - 498kB

Ubya - 8-5-2019 at 08:38

the potassium-chromium crystal in a crystal is really cool:D

Bedlasky - 8-5-2019 at 23:29

Ubya: Thanks :).

Ammonium-ferric sulfate growing up very fast! I just love these crystals :D. Here is few photos from this morning.

IMG_20190509_070319.jpg - 2.1MB IMG_20190509_070332.jpg - 2.2MB

[Edited on 9-5-2019 by Bedlasky]

DraconicAcid - 10-5-2019 at 12:19

Crude cinnamic acid, basically solidified blobs of acid mixed with cinnamaldehyde, with crystals of pure acid growing from them.

CinnUrchin1.jpg - 57kB

j_sum1 - 26-5-2019 at 02:51

Running some tests on an otc product to figure out what might work for an extraction.

IMG20190526203944.jpg - 2.5MB

fusso - 26-5-2019 at 02:53

@jsum so what exactly are you extracting? And why are some yellow?

[Edited on 190526 by fusso]

j_sum1 - 26-5-2019 at 05:57

I am being deliberately vague because I think I have found something cool and I would love to solve it myself. It is an otc product based on an ionic liquid with a somewhat oily consistency and unknown other ingredients. My tests show that it forms emulsions easily.

Phthaloblue - 26-5-2019 at 12:07

Some nice FeSO4 crystals from a few years ago, made from steel wool and drain cleaner sulfuric acid as per this link. Alas, they're all brown and spoiled now. Picture has been edited to improve quality (brightness/contrast).

Eventually I should save them by redissolving in dilute sulfuric acid, filtering off the crud, reducing the Fe3+ with a little extra iron, and making some Mohr's salt ((NH4)2Fe(SO4)2·6H2O)

feso4_1.jpg - 117kB

[Edited on 5/26/2019 by Phthaloblue]

oberkarteufel - 10-6-2019 at 23:57

CoCl2 + isopropanol + water

CoCl2.jpg - 113kB

Mabus - 7-7-2019 at 08:00

Quote: Originally posted by Phthaloblue  
Some nice FeSO4 crystals from a few years ago, made from steel wool and drain cleaner sulfuric acid as per this link. Alas, they're all brown and spoiled now. Picture has been edited to improve quality (brightness/contrast).

Eventually I should save them by redissolving in dilute sulfuric acid, filtering off the crud, reducing the Fe3+ with a little extra iron, and making some Mohr's salt ((NH4)2Fe(SO4)2·6H2O)


When I recrystallized my FeSO4x7H2O, I washed the crystals with some isopropanol then left them to dry. Even after 6 months they still haven't turned brown.

Abromination - 8-7-2019 at 15:21

No mercury present, but the thought is beautiful.
This will make a nice addition to my element collection.


DE12CCDF-AFE0-4859-8784-2957FA3BAAEE.jpeg - 1.9MB

A failed attempt at Copper Peroxide yielded this

Σldritch - 7-8-2019 at 11:48

I am at a loss how to make the synthesis work in water. It hates being filtered and decomposes really quick. Make it with too concentrated peroxide and it goes whoosh. At least it looks pretty this way. Some of the desired product can be seen on the glass rod where it escaped the water.

IMG_20190807_212443.jpg - 262kB

[Edited on 7-8-2019 by Σldritch]

Ice spikes

wg48temp9 - 25-11-2019 at 05:44

One frosty morning recently I spotted some ice spikes that had grown out of some water that had frozen in an up turned plastic access cover in my garden. Previously I had only seen pics of them.

icespikes.jpg - 314kB

stoichiometric_steve - 30-11-2019 at 04:37

Quote: Originally posted by Hegi  
Can you please provide full procedure?


I second that - please provide your procedure! As far as NaBH4 and HCHO are concerned, they'll just make carbolines with your substrate, so i hope you've done careful analysis. I just recently learned that the claimed product is itself neurotoxic as well.

Bezaleel - 4-2-2020 at 13:56

CsCu(SO4)2.6H2O, a Tutton salt

IMG_2446_+.JPG - 382kB

The large crystal is 2cm across and was grown in 2 days. I think that's much too fast to obtain fully transparent crystals.

Tutton himself described the colour as greenish blue. I can't photograph that, but under incandescent light the colour is indeed greenish blue. The picture was taken under a fluorescent lamp light.

The crystal habit Tutton describes in his 1893 article is in the drawing (Fig. 31).
J Chem Soc 1893 V63 p403 - fig31.jpg - 48kB

Bezaleel - 6-2-2020 at 09:31

Cs2Cu(SO4)2.6H2O of course

Tacticalnuke101 - 21-2-2020 at 04:33

Some Tetraamminecopper(II) sulphate complex I made

A19C7064-C257-47DB-9F5E-467CCA38854E.jpeg - 2.3MB

Amos - 27-2-2020 at 17:15

The two extremes of Cobalt Violet, a cobalt(II) phosphate pigment. The pink one was prepared by adding aqueous ammonia to excess pink(relatively dilute) CoCl2 and NaH2PO4 solution, while the deep purple one was prepared by adding solid KOH to a boiling hot solution of the two that had been saturated with salt.

237D9DC0-21BC-421B-B92D-57A519518FDF.jpeg - 1.9MB

arkoma - 27-2-2020 at 17:32

Pretty tasty stuff and a pretty picture! Breakfast in San Antonio Tlayacapan, Jalisco

food.jpg - 805kB

Bezaleel - 3-3-2020 at 03:24

Quote: Originally posted by Amos  
The two extremes of Cobalt Violet, a cobalt(II) phosphate pigment. The pink one was prepared by adding aqueous ammonia to excess pink(relatively dilute) CoCl2 and NaH2PO4 solution, while the deep purple one was prepared by adding solid KOH to a boiling hot solution of the two that had been saturated with salt.

Great colours!

And do you know the composition of both compounds, their formula?


[Edited on 3-3-2020 by Bezaleel]

DraconicAcid - 3-3-2020 at 18:47

An attempt at K2Cu(malonate)2. Nice xtals, but they turned much paler blue after drying.

CuMal.jpg - 51kB

anti - 9-3-2020 at 12:41



[Edited on 10-3-2020 by anti]

fusso - 9-3-2020 at 16:46

Cant u shrink the imgs? theyre unnessarily big and is annoying to scroll and watch.

anti - 10-3-2020 at 00:04

Quote: Originally posted by fusso  
Cant u shrink the imgs? theyre unnessarily big and is annoying to scroll and watch.

Ok

Herr Haber - 10-3-2020 at 04:18

And maybe get rid of the non chemistry pictures ?
(I dont want to imagine what they were before shrinking, they're still too big)

anti - 10-3-2020 at 10:31

Quote: Originally posted by Herr Haber  
And maybe get rid of the non chemistry pictures ?
(I dont want to imagine what they were before shrinking, they're still too big)

Fine.
Is it good now?

j_sum1 - 10-3-2020 at 12:40

Thanks anti for fixing that up. I was not sure how to edit that for you.
Feel free to redo the chem pics. Uploading a file works well. Click previw to check. Not sure what happened with the img tag, but the other method is reliable.

Welcome to SM.

Texium - 16-3-2020 at 18:38

Today at work I witnessed what happens when a flask is heated WAY too hot while under vacuum!

F0EDE7D2-2E5F-4BFA-9305-381437F93A99.jpeg - 218kB FB322668-DA9A-44B2-BDAC-97A731942F7E.jpeg - 289kB
It mushroomed!

DraconicAcid - 16-3-2020 at 19:47

Ha! I had that happen to one of my sample tubes, long ago, when I worked with molten salts. I was trying to dry lithium chloride under vacuum, but heated it just enough that the glassware softened. I wound up with a very flat Schlenk tube.

wg48temp9 - 17-3-2020 at 01:12

Quote: Originally posted by Texium (zts16)  
Today at work I witnessed what happens when a flask is heated WAY too hot while under vacuum!
It mushroomed!


Wow! Was it heated in a mantle?

Why did the flask get so hot? Was it because the mantle was at full power and once the beads were dry and therefore not cooled by evaporation of the solvent the flask got sufficiently hot to soften and then deform? Was the mantel damaged? How could it have been avoided? Presumably by monitoring the flask temperature.

Texium - 17-3-2020 at 05:07

Pretty much spot on. However, the mantle was hooked up to a variac, and the variac was only at 65% :o

The funny thing is, I think as the glass pulled away from contact with the heating mantle, it slowly cooled and hardened again, and that’s why it didn’t fully implode and held its shape without deforming any more. Surprisingly, the heating mantle was not fused to it, and still works perfectly fine!

DavidJR - 17-3-2020 at 05:10

Yeah I've done that to an erlenmeyer on a hotplate. I was also trying to dry sieves.

Much better method is to use a microwave oven.

Tsjerk - 17-3-2020 at 06:38

I fried a microwave/oven a week ago when I tried to dry sieves. I accidentally turned on the microwave function of the oven and set it to 90 minutes... When I came back after 30 minutes the plastic rotation stand for the glass plate was smoking and the beaker glass was molten to the glass bottom plate.

It did get me a transformer to build a Tesla coil!

wg48temp9 - 17-3-2020 at 11:11

Quote: Originally posted by Tsjerk  
I fried a microwave/oven a week ago when I tried to dry sieves. I accidentally turned on the microwave function of the oven and set it to 90 minutes... When I came back after 30 minutes the plastic rotation stand for the glass plate was smoking and the beaker glass was molten to the glass bottom plate.

It did get me a transformer to build a Tesla coil!


That demonstrates a problem with using a microwave oven (in microwave mode) similar to the mantle problem. While the sieves are wet with water (or a solvent in the case of a mantle) the microwaves are absorbed by the water which limits the power density in the oven. and evaporation of the water limits the temperature rise of the serves.

As the sieves dry the microwave energy density can increase and as it increases things in the oven or parts of the oven including the magnetron and the sieves absorb significant energy and get significantly hotter than when there is more water present to absorb the microwaves.

That temperature rise can cause damage including melting. The high power density it can also cause arcing particularly when food residues carbonise. Most microwave ovens are designed to operates empty but only for a limited time, typically a few minutes.

wg48temp9 - 20-3-2020 at 01:46

Quote: Originally posted by Texium (zts16)  
Pretty much spot on. However, the mantle was hooked up to a variac, and the variac was only at 65% :o

The funny thing is, I think as the glass pulled away from contact with the heating mantle, it slowly cooled and hardened again, and that’s why it didn’t fully implode and held its shape without deforming any more. Surprisingly, the heating mantle was not fused to it, and still works perfectly fine!


I assume 65% refers the the percentage of the input voltage so thats about 42% input power. So for a typical 500W mantle thats only 210W. I am surprised that would be sufficient the soften the borosilicate flask. I guess the combination of the vacuum to reduce thermal conduction and the beads to reflect back the thermal radiation was sufficient insulation to allow the base of the flask to reach its softening temperature of about 500C.

Cou - 2-4-2020 at 19:25




making 2-bromopropane (bottom later) with isopropyl alcohol and hydrobromic acid x)


[Edited on 3-4-2020 by Cou]

Screenshot_6.png - 2MB

Herr Haber - 3-4-2020 at 13:36

Quote: Originally posted by Texium (zts16)  
Today at work I witnessed what happens when a flask is heated WAY too hot while under vacuum!


It mushroomed!


No cracks no nothing after cooling ? Pretty good glass !

Cou - 5-4-2020 at 17:23

h

20200404_235820.jpg - 49kB

Bedlasky - 15-4-2020 at 20:15

Hi.

Orange solid is (NH4)4H6[Mn(MoO4)6] and cream solid is MnMoO4. It's interesting that two compounds with similar composition have that much different colours.

DSC03154 - kopie.jpg - 3.1MB

Lion850 - 30-4-2020 at 01:01

If you like green - the different green shades of praseodymium.

Pr shades of green.jpg - 2MB

Lion850 - 22-5-2020 at 20:25

Lead iodide PbI2 drying on steam bath


2316B23F-66FF-404A-A8B5-F083EFAA00B5.jpeg - 1.3MB

j_sum1 - 22-5-2020 at 20:38

When Lion850 posts in pretty pictures you know it is going to be good.
That gold is amazing!

woelen - 23-5-2020 at 09:03

A nice picture of two comparable compounds I made: Ag3PO4 and Ag3AsO4.



ag_both.jpg - 277kB

Bedlasky - 23-5-2020 at 21:23

Woelen: Nice picture. Similar colour difference can be also seen in many chalcogenides (probably best colour differences can be seen in CdO/CdS/CdSe/CdTe - the bigger anion the darker colour).

Mix of hydrated silicon dioxide, sodium silicomolybdate and silicomolybdenum blue.





1.jpg - 1.4MB

arkoma - 24-5-2020 at 00:19



nitrogen1.jpg - 123kB

Lion850 - 24-5-2020 at 18:49

Copper acetate. The zoomed in photo is the copper acetate drying on a steam bath and shown in the crucible is the dry product. The color stayed very much the same from wet to dry.

420EA597-153D-40D8-BCB8-85A64C715569.jpeg - 2.2MB 28BAE292-9E04-4EC7-A2E5-AE40F4D893C8.jpeg - 2.3MB

arkoma - 25-5-2020 at 08:08

I absolutely love the color of Copper Acetate

Lion850 - 26-5-2020 at 01:03

arkona - I wonder how suited copper acetate is to grow big crystals? It's something I want to try.

sciece nerd - 26-5-2020 at 03:38

Very suitable, in fact I planned to buy some copper acetate just for growing crystals.

DraconicAcid - 26-5-2020 at 09:06

One of my books on crystal-growing recommended copper acetate, as well as calcium copper acetate, a mixed salt made by crystallizing a 4:1 mixture of calcium acetate and copper acetate.

mayko - 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

Texium - 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

Sigmatropic - 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]

Morgan - 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.

violet sin - 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

B(a)P - 28-5-2020 at 19:38

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

IMG_20200529_092941.jpg - 2.8MB

Boffis - 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.

Texium - 29-5-2020 at 08:39

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

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

violet sin - 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.

Ubya - 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)
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arkoma - 31-5-2020 at 11:46

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

funnel.jpeg - 41kB

violet sin - 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.

IMAG7611.jpg - 1.2MB IMAG7613.jpg - 781kB IMAG7614.jpg - 812kB IMAG7605.jpg - 1MB

IMAG7616.jpg - 884kB IMAG7602.jpg - 914kB




Ubya - 3-6-2020 at 15:46

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

violet sin - 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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OldNubbins - 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

sciece nerd - 8-6-2020 at 02:45

What's that?
(The label looks like "astanum", which is apparently not a thing)

j_sum1 - 8-6-2020 at 03:37

I think you will find it says, "Platinum".
Yum!

karlos³ - 8-6-2020 at 04:54

To me it says clearly platinum too.
Reminds me of the "710 cap" joke :D

sciece nerd - 8-6-2020 at 07:43

I guess I have to look more closely.

karlos³ - 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

DraconicAcid - 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]

Bedlasky - 18-6-2020 at 13:09

These blue needles looks awesome!

Lion850 - 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

Fyndium - 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

DraconicAcid - 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

phlogiston - 19-7-2020 at 15:23

A macro shot of an uranium mineral under short wave UV light.
The field of view is about 5 mm and the exposure time was 10 seconds, making this seem like a lot more than it actually is.

I found this rock in Germany a few years ago, in an old quarry from which low grade uranium ore (<0.1% U) was mined in the 60's. It registers about 4000 cpm with my Geiger-Muller tube, comparable to uranium glass.

What surprised me is that it fluoresces under short-wave UV, but not under long-wave UV. Under long-wave UV or normal light, no obvious U minerals can be distinguished.

Still not sure exactly what the mineral is, my current best guess based on the locality and this fluorescence is metaheinrichite (Ba(UO2)2(AsO4)2.8H2O), but regardless, I do enjoy finally being able to claim that I have extracted a tiny but visible amount of uranium from the earth myself. I'll be adding the rock to my element/mineral collection.

IMG_1202 copy.JPG - 421kB

[Edited on 19-7-2020 by phlogiston]

Belowzero - 19-7-2020 at 22:22

That is some serious wallpaper quality picture, very nice!

Fulmen - 19-7-2020 at 23:18

Are you sure that's not the Andromeda strain?

phlogiston - 20-7-2020 at 16:24

Belowzero, I was pleasantly surprised by the picture quality too, considering I used a 12-year old simple 'compact' camera

I'm in the market for a new camera. Any recommendations?
I'd preferably have something versatile. Sometimes I want a macro shot like I posted, but sometimes I want to zoom in on something distant, and most often I just want to quickly take a nice, but well-focused and high-resolution picture or video of my family.

[Edited on 21-7-2020 by phlogiston]

violet sin - 22-7-2020 at 20:10

I got a couple min to set up a tripod, clip on lense and my phone from the back yard. This was a few nights ago.

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j_sum1 - 22-7-2020 at 23:37

That's pretty cool, VS.

violet sin - 23-7-2020 at 06:40

Here are a couple from last night. Not as good, it's quit a bit dimmer now. Our sky had haze and it didn't help at all. This is 8x magnification on top of what ever my phone does.

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Took quit a bit of fiddling to get it right. The set up was not ideal. At one point the clip dropped my phone with lense clipped on... To concrete on edge of pool.. happy bounce away from the water softener by my foot.

I had trouble seeing it this time. The other day it was easy to see. My 6 year old spotted it right away. Now I don't think so. Anyone have better luck than I?

[Edited on 24-7-2020 by violet sin]

*********
July 23
Nothing I could get. Either I missed it or it's too dim for the tiny clip on lense.

[Edited on 24-7-2020 by violet sin]

Herr Haber - 23-7-2020 at 09:56

Quote: Originally posted by phlogiston  
It registers about 4000 cpm with my Geiger-Muller tube, comparable to uranium glass.


Err, a lot more I would say !
My hottest piece of uranium glass gives around 400 cpm


Quote: Originally posted by phlogiston  

What surprised me is that it fluoresces under short-wave UV, but not under long-wave UV. Under long-wave UV or normal light, no obvious U minerals can be distinguished.


Same surprise when I asked the dentist to use his UV light.
You should watch Nile Red's video on making uranium glass if you havent already it is both interesting and surprising imho.

CharlieA - 23-7-2020 at 15:17

VS: great pix! great job!:)

phlogiston - 24-7-2020 at 03:44

Quote: Originally posted by Herr Haber  
Quote: Originally posted by phlogiston  
It registers about 4000 cpm with my Geiger-Muller tube, comparable to uranium glass.


Err, a lot more I would say !
My hottest piece of uranium glass gives around 400 cpm


The number of counts is very dependent on the GM tube you use, so we probably have very different tubes. Different uranium glass too, probably.

Boffis - 26-7-2020 at 02:45

Not for the faint hearted; 6g of diiodo-acetylene recrystallised from dichloromethane:-

Diiodoacetylene from dichloromethane.jpg - 117kB

Pok - 28-7-2020 at 16:26

Pure hydrogen cyanide

1.jpg - 89kB




j_sum1 - 28-7-2020 at 17:48

Quote: Originally posted by Pok  
Pure hydrogen cyanide

Looks nice inside the ampoule!

arkoma - 28-7-2020 at 20:19


Had a bit of NOx build up during ethyl nitrite synth.Picture does it no justice.


nox.jpg - 507kB

no2.jpg - 645kB

j_sum1 - 28-7-2020 at 21:07

Nice rack Arky.

arkoma - 28-7-2020 at 21:13

Quote: Originally posted by j_sum1  
Nice rack Arky.


ROFLMAO.

DraconicAcid - 31-7-2020 at 21:19

Cheapest chromatography column ever- 4 cm of calcium carbonate, using hexanes (then 9:1 hexanes/ethyl acetate) as an eluent separated carotenes from chlorophylls perfectly.

ChromPipette1.jpg - 118kB

Lion850 - 1-8-2020 at 22:52

Copper glycinate crystallising out on the steam bath.

9DF85A78-EDD0-4D14-ABEC-208D37DAD7DB.jpeg - 2.4MB

arkoma - 3-8-2020 at 15:38

working on HMTA and HCl to CH3NH2 HCl

methylamine.jpg - 64kB

Lion850 - 4-8-2020 at 18:24

A cobalt glycinate salt drying on the steam bath. The few glassy crystals is probably the slight excess of glycine.

4342AEF7-5AEA-49DF-A6ED-B6A78D5DB97A.jpeg - 2MB

Lion850 - 5-8-2020 at 18:54

Salt formed from reacting nickel carbonate with glycine crystallising out on the steam bath. Hope it stays blue as it dries!

D112BF42-7854-40F1-AE4F-5E3C74700961.jpeg - 1.7MB

Lion850 - 2-9-2020 at 17:45


I stumbled across this website that shows pictures of many compounds. This will be a useful resource for me as I am always trying to make different colors :) How accurate it is I do not know but at least for copper it seems in the ballpark.

https://onyxmet.com/index.php?route=information/periodic_tab...


teodor - 2-9-2020 at 22:11

Ammonia gas passing above lithmus solution.

am1.jpg - 236kBam2.jpg - 332kB

pneumatician - 3-9-2020 at 07:26

Cyan copper...





cian_Cu.jpg - 304kB

Lion850 - 16-9-2020 at 15:10

Wet crystals of Tin ii iodide

B9C81861-9B2E-4865-AEC7-589D9BF5B86F.jpeg - 326kB

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