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Редкоземельные элементы РЗЭ
http://www.chemistry-chemists.com/forum/viewtopic.php?f=1&t=1072		 Page 4 of 5
Author:  Volodymyr [ 07 Jun 2021 16:13 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Ацетат европия (III) [Eu(CH3СOO)3] в УФ-свете
Europium (III) Acetate [Eu(CH3СOO)3] under UV light
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https://www.reddit.com/r/chemistry/comm ... ade_under/
Author:  Volodymyr [ 12 Jun 2021 12:21 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Кристаллы гексагидрата хлорида европия (EuCl₃ 6H₂O) в УФ-свете (и в видимом свете)
Crystals of Europium Chloride Hexahydrate (EuCl₃ 6H₂O) under UV light
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Author:  vano34 [ 12 Feb 2022 13:40 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
samarium metal

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Author:  vano34 [ 12 Feb 2022 13:41 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
erbium acetate tetrahydrate

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Author:  vano34 [ 22 Feb 2022 13:44 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Erbium acetate tetrahydrate and samarium nitrate hexahydrate in ampoules.

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Author:  vano34 [ 08 Sep 2022 17:30 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
some of my rare earths.

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Author:  vano34 [ 11 Sep 2022 12:31 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Praseodymium(III)-potassium sulfate - PrK3(SO4)3*H2O

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Author:  Volodymyr [ 12 Apr 2023 22:19 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Коррозия неодимовых магнитов под действием сильных дождей на протяжении двух месяцев, магниты были в капоте автомобиля.
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Коричневый цвет - явно гидроксид трехвалентного железа (ржавчина).
Author:  Oleg [ 12 Apr 2023 22:36 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Volodymyr wrote:
Коррозия неодимовых магнитов под действием сильных дождей на протяжении двух месяцев, магниты были в капоте автомобиля.
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Коричневый цвет - явно гидроксид трехвалентного железа (ржавчина).

Стоит повредить внешнее гальваническое покрытие и разрушение идёт стремительно. Видимо, там электрохимический фактор что ли...
Author:  Volodymyr5 [ 13 Apr 2023 08:36 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Скорее всего там никелевое покрытие, в случае нарушения целостности оно должно ускорять разрушение сплава неодим - железо - бор.
Author:  Volodymyr [ 30 Apr 2023 20:06 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Promethium 147 Paint Cell From Nova Elements
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"синтетический" лантаноид.
Author:  Volodymyr [ 22 May 2023 22:06 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Terbium(III) nitrate under UV
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Author:  Volodymyr [ 01 Nov 2023 18:57 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Potassium terbium sulphate KTb(SO4)2 from 0.32 g terbium metal
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Author:  Volodymyr [ 17 Jan 2024 11:18 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Europium(III) acetate and Europium(III) oxalate hydrates under UV light
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Author:  Volodymyr [ 04 Apr 2024 21:02 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Holmium “doped” glass turns pink under fluorescent light and yellow under daylight (phosphate glass )
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Quote:
Top left: Holmium doped glass in front of a fluorescent light. Turns pink.

Top right: Holmium doped glass halfway in front of a fluorescent lamp and halfway in front of a daylight lamp. Because the glass is refractive, the color gradient appears opposite of expected: the yellow half is in front of the fluorescent lamp, and the pink half is in front of the daylight lamp.

Bottom right: Holmium doped glass in front of a daylight lamp. Turns yellow.

Bottom left: a small piece of mostly pure Holmium metal.

https://www.reddit.com/r/chemistry/comments/1bvb664/holmium_doped_glass_turns_pink_under_fluorescent/
Author:  Volodymyr5 [ 19 Apr 2024 14:12 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Various lanthanide sulfate salts
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Author:  Volodymyr5 [ 26 May 2024 22:15 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Quote:
Lanthanide salts
Ln₂(SO₄)₃•nH₂O, n=9 for La and Ce, n=8 for everything else

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Author:  Volodymyr [ 18 Nov 2024 19:21 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
A triboluminescent terbium complex
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Author:  Volodymyr [ 05 Feb 2025 22:24 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
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Quote:
Full box of lanthanide salts I’m giving to my friend tomorrow for his birthday

Hey, you probably clicked on this since you were wondering about the promethium, well I made an imitation promethium salt from 1:1 molar ratio of neodymium and samarium (the 2 neighboring elements), this is possible due to the extremely similar chemical properties of neodymium and samarium in the +3 state, so they cocrystallize together in a single crystal lattice

Turns out the color of this fake promethium salt looks very very close to the real one, making for a very convincing (and safe) disguise

Also due to the fact that all lanthanide samples more or less have europium contamination, and almost half of europium is actually radioactive 147Eu which slowly decays into 147Pm, the fake promethium sample should also have a few real promethium atoms in it from time to time

There’s around 2g of lanthanide sulfate in each vial, which I made myself from either the oxide or the metal + sulfuric acid

https://www.reddit.com/r/chemistry/comments/1iid3f2/full_box_of_lanthanide_salts_im_giving_to_my/
Author:  Volodymyr [ 07 Feb 2025 18:14 ]
Post subject:  Re: Редкоземельные элементы РЗЭ
Erbium acetate tetarahydrate
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