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 Post subject: Re: Нуждаюсь в совете
PostPosted: 08 Aug 2022 15:08 
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thanks! I saw some researches but here rocks contain somewhere 1-10g U per ton and 10-20g Th per ton, it's impossible to work with.


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 10 Aug 2022 13:41 
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vano34 wrote:
thanks! I saw some researches but here rocks contain somewhere 1-10g U per ton and 10-20g Th per ton, it's impossible to work with.

https://www.sciencedirect.com/science/article/pii/S1876610217336858/pdf?md5=2b984ad0a5a30bb4ff3ddf850a53e065&pid=1-s2.0-S1876610217336858-main.pdf&_valck=1

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 Post subject: Re: Нуждаюсь в совете
PostPosted: 10 Aug 2022 14:27 
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thank you Oleg so much!


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 12 Aug 2022 12:22 
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hello! I'm just interested in how is possible to concentrate sand from the beach which contains thorium. this guy said with a magnet as I guess, but I don't understand the language exactly. Is thorium in the sand that sticks to the magnet?

https://youtu.be/R-i4E72b6fs?list=LL&t=277


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 12 Aug 2022 12:33 
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Yes, it is:
Quote:
Thorium sand is twice as heavy as ordinary sand: everyone can be convinced if such sand is shaken a little on a plastic plate. The concentrate is collected from the edge.

Thorium sand also has magnetic properties. This is the basis of the magnetic separation method...
****
Ториевый песок в два раза тяжелее обычного: каждый может убедиться, если немного потрясет такой песок на пластиковой тарелке. Концентрат собирается с краю.

Ториевый песок также обладает и магнитными свойствами. На этом основан метод магнитной сепарации...

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 Post subject: Re: Нуждаюсь в совете
PostPosted: 12 Aug 2022 13:05 
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thank you Volodymyr!

so i'll make magnetic separation. i'll make strong electromagnets. then dissolve this sand in conc. sulfuric acid for few hours. then remove iron from solution, as i know its contains lots of Magnetite, isnt it?


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 12 Aug 2022 13:15 
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Being a stable and mechanically strong mineral, when bedrock is destroyed, monazite passes into placers (river and sea) along with ilmenite, rutile, zircon, magnetite and other minerals with which it is genetically associated.

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 Post subject: Re: Нуждаюсь в совете
PostPosted: 12 Aug 2022 13:21 
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thanks. The river also brings thorium from the same area, most likely from where magnetite. In the research, this orefield was not mentioned as a source of thorium. If there is this particular concentration of Th on the beach, there must be much more in the orefield. If I examine that place with a dosimeter, maybe I will find monazite. what do you think?


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 12 Aug 2022 13:57 
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I hope you are lucky and find the monazite.
P.S. I had similar minerals at my last job - oil production sludge. But there was no laboratory to work with them.
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 Post subject: Re: Нуждаюсь в совете
PostPosted: 12 Aug 2022 14:30 
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thanks for answers. If something interesting comes out, I will definitely post it here.


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 29 Aug 2022 13:49 
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hello! I have an idea and need some advice. I have almost all lanthanides. I want to synthesize some polymer(i have ideas but I did not specify which) and make complex with lanthanide. then make a thin layer of this lanthanide polymer complex. Which polymer do you recommend I use and which lanthanide?


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 29 Aug 2022 17:16 
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vano34 wrote:
hello! I have an idea and need some advice. I have almost all lanthanides. I want to synthesize some polymer(i have ideas but I did not specify which) and make complex with lanthanide. then make a thin layer of this lanthanide polymer complex. Which polymer do you recommend I use and which lanthanide?

Unfortunately, I never worked in this field, but there are some articles, for example:

F. Cao, T. Huang, Y. Wang, F. Liu, L. Chen, J. Ling and J. Sun, - Novel lanthanide–polymer complexes for dye-free dual modal probes for MRI and fluorescence imaging // Polym. Chem., 2015,
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Marcelina Cardoso Dos Santos, Anne Runser, Hortense Bartenlian, Aline M. Nonat, Loïc J. Charbonnière, Andrey S. Klymchenko, Niko Hildebrandt, and Andreas Reisch - Lanthanide-Complex-Loaded Polymer Nanoparticles for Background-Free Single-Particle and Live-Cell Imaging // Chem. Mater. 2019, 31, 11, 4034–4041
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acs.chemmater.9b00576.pdf [3.66 MiB]
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 Post subject: Re: Нуждаюсь в совете
PostPosted: 29 Aug 2022 17:53 
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Thanks for the answer! I want to do it for research, I have this idea. I would like to do something about lanthanoids or osmium complexes, although I have not come across any other use of osmium complexes except for medicine, and that is the least interesting field for me.


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 01 Sep 2022 21:14 
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today I found some bromine in the vial, that was not useful for me, then I add some niobium (not powder). I know it needs a high temperature to make pentabromide, as the literature said, but I watched a video where one guy used a condenser also, so there was less than 100C. so maybe I'll get some niobium pentabromide? maybe weeks or months later?


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 01 Sep 2022 21:48 
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It is most likely that the reaction will not occur at room temperature or at low heat.

Brauer recommends using a temperature of 450C (in steam).

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 Post subject: Re: Нуждаюсь в совете
PostPosted: 01 Sep 2022 22:00 
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yes. I love Brauer, good inorganic book. I just watched this video. so now I'm interested in how and if this reaction goes, let's try. ill write the result here. in my opinion, it's possible that ill get yellow niobium oxybromide.


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 01 Sep 2022 22:03 
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In the Russian edition - 450С,
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Г. Брауер (ред.) Руководство по препаративной неорганической химии (однотомник)
Code:
http://chemistry-chemists.com/book5/himija/neorganicheskaja_i_analiticheskaja_himija/Brauer_Ruk_Preparat_Neorg_Chem.pdf


the English edition recommends lower temperatures (from 90C for powder and from 195C for compact niobium)
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Brauer G. Handbook of preparative inorganic chemistry vol.2, 1965
http://chemistry-chemists.com/chemister ... 963-2.djvu

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 Post subject: Re: Нуждаюсь в совете
PostPosted: 01 Sep 2022 22:15 
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thank you for your time! okay, ill wait 1-2 weeks and then see if there is a red or yellow compound on the surface of the niobium.


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 09 Sep 2022 21:52 
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I have some SeCl4 dichloromethane solution, i want to make dithiol complex. as research said selenium produces yellow precipitate with toluene dithiol. so I made a structure, what do you think the structure will be like that? just i cant make an analysis right now.


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 Post subject: Re: Нуждаюсь в совете
PostPosted: 10 Sep 2022 11:50 
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In addition to this substance, related compounds (mixture) can be formed

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