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vano
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[*] posted on 20-6-2022 at 03:07
Heteropolymetalates

Hello! I started making different Heteropolymetalates.


Today I made ammonium 12-molybdatecerate(IV) - (NH4)8CeMo12O42*8H2O. According to the methodology it is prepared as follows. However I did three times as much.

Add 7g of Ceric ammonium nitrate in 140ml water. add 30g of ammonium heptamolybdate tetrahydrate in 100ml watar. stirring is required. When the solution is mixed, a yellow precipitate is released.



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[*] posted on 20-6-2022 at 04:48


Ammonium 6-molybdochromate(III) - (NH4)3[CrMo6O24H6] •nH2O. n= 4-7.

Dissolve 12 g of NH4Cr(SO4)2 •12H2O in 50ml H2O. Add 30 g ammonium heptamolybdate tetrahydrate in 110ml water. The solution will have a green color. It is necessary to add sulfuric acid until pH=4.5. A precipitate will then form which will have a purple color

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[*] posted on 20-6-2022 at 22:30


Ammonium 6-molybdonickelate(II) - (NH4)4[NiMo6O24H6]•5H2O

Dissolve 22g of ammonium heptamolybdate tetrahydrate in 200 ml water and 2.6 g of nickel sulfate hexahydrate in 150 ml water. Mix the solutions and boil for 10 minutes.


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[*] posted on 21-6-2022 at 01:06


three jars of phosphotungstic acid.


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[*] posted on 21-6-2022 at 01:09


1L jar of phosphomolybdic acid.


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[*] posted on 21-6-2022 at 03:46


Hi Vano!

Hexamolybdatonickelate is labile at temperatures higher than 60 °C. Let it precipitate at room temperature, you will get light blue solid.

Solubility of heteropolymolybdates is much higher in hot water, it is better to cool down solution in the fridge. More precipitate will crush out.
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[*] posted on 21-6-2022 at 05:11


Hello and thanks! I didn't know that fact about Hexamolybdatonickelate, i just made it according old soviet book. I also made Silver phosphovanadate. Brown-black compound. When it dries I will post photos.



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[*] posted on 21-6-2022 at 05:14


(NH4)8CeMo12O42*8H2O. I made more.

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[*] posted on 21-6-2022 at 13:19


Btw. tungstates can stabilize metal ions in high oxidation state (Mn(IV), Co(III), Ni(III), Pr(IV) etc.). Maybe molybdates can do the same? I don't know, never read about it, but I once made some solution containing Co(III) in excess of molybdate.
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[*] posted on 22-6-2022 at 03:28


There is also nickel(IV) heteropolymetalate in my book. I will try to get it in the near future.



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[*] posted on 28-6-2022 at 02:27


silver 12-vanadophosphate Ag7(PV12O36)•nH2O f

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[*] posted on 1-7-2022 at 21:32


Sodium 6-molybdoiodate. Na5(IMo6O24)•nH2O (n=26,34).


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[Edited on 2-7-2022 by vano]



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[*] posted on 5-7-2022 at 00:25


Sodium 6-molybdocobaltate(III) - Na3(Mo6O24H6)*8H2O

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[*] posted on 5-7-2022 at 06:50


Na9[α-SbW9O33]*27H2O

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[*] posted on 5-7-2022 at 08:29


Ammonium 12-molybdophosphate - (NH4)3[PMo12O40] *nH2O.

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[*] posted on 5-7-2022 at 08:49


Beautiful! I especially like the Co(III) one. I haven't seen a green cobalt compound before as far as I can remember. Do you have any further experiments in mind for these products, or are you just making them all for your collection?



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vano
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[*] posted on 5-7-2022 at 09:29


Quote: Originally posted by Texium  
Beautiful! I especially like the Co(III) one. I haven't seen a green cobalt compound before as far as I can remember. Do you have any further experiments in mind for these products, or are you just making them all for your collection?


I haven't read anything specifically about the use of this compound, but if I see any information and am interested, I will try it. This time I just made it for my collection, I think when I make many other heteropolymetalates I will start to study their properties.



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[*] posted on 7-7-2022 at 03:45


Cesium 12molybdic acid 1- silicate Cs2[SiMo12O39] * nH2O

Brauer p.1729-1730.

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[*] posted on 26-7-2022 at 00:45


just nice photo

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[*] posted on 14-8-2022 at 06:48


Potassium 6-molybdochromate(III) - K3[CrMo6O24H6] • nH2O


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[*] posted on 8-9-2022 at 08:05


Ammonium 10-molybdodicobaltate(III) - (NH4)6(Co2Mo10O30)*10H2O

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color isn't very different from Na3(CoMo6O24H6)*8H2O.

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[*] posted on 10-10-2022 at 09:03


12-Molybdic Acid-1-Arsenate - H3[AsO4(Mo3O9)4] *nH2O

(Brauer - p. 1734)

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[*] posted on 21-10-2022 at 18:33


Awesome pics, love the bright yellow ones especially.

Keep it up!
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[*] posted on 24-10-2022 at 09:08


Thank you!



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[*] posted on 29-10-2022 at 00:57


ammonium nonanmolybdatomanganate - (NH4)6[MnMo9O32]*nH2O


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