7lanthanum
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How do I get manganese (II) sulfate crystals to form?
I'm not sure how to get the solution to be supersaturated. If someone knows, please tell me. Thanks.
[Edited on 29-7-2016 by 7lanthanum]
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NEMO-Chemistry
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Quote: Originally posted by 7lanthanum  | I'm not sure how to get the solution to be supersaturated. If someone knows, please tell me. Thanks.
[Edited on 29-7-2016 by 7lanthanum] |
Its seems to be deliquescent in crystal form, i did find a thread discussing some crystals of this.
http://www.sciencemadness.org/talk/viewthread.php?tid=12323
It might not directly answer your question, but should give some avenues to explore that might help you. Also it mentions Woelens website has some
info on this so thats well worth a visit.
Opps edit
Forgot Woelens site
http://www.oelen.net/science
Be careful when browsing his site, you can easily get sidetracked!! I spent ages reading it and wanted to try it all lol
[Edited on 29-7-2016 by NEMO-Chemistry]
Another edit
I know this isnt waht your looking for, but as its related and i think might be useful in the future for others i am posting it here, its a paper
discussing doping the crystals.
http://www.ijsea.com/archive/special_issue/NCRTAM/IJSEA_NCRT...
[Edited on 29-7-2016 by NEMO-Chemistry]
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Texium
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Manganese(II) sulfate isn't deliquescent. I recrystallized some impure stuff over a year ago, but I just boiled it down to get a pale pink powder
rather than letting it all crystallize slowly. It hasn't absorbed any water since then, and it's just in a regular jar. If you want to make decent
crystals of it, just leave a beaker of it in solution out in the sun. The water will evaporate and it will crystallize. It could take a while though,
and you may want to put some cheesecloth over the container to keep out dust and critters.
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7lanthanum
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| Quote: Originally posted by zts16 | | Manganese(II) sulfate isn't deliquescent. I recrystallized some impure stuff over a year ago, but I just boiled it down to get a pale pink powder
rather than letting it all crystallize slowly. It hasn't absorbed any water since then, and it's just in a regular jar. If you want to make decent
crystals of it, just leave a beaker of it in solution out in the sun. The water will evaporate and it will crystallize. It could take a while though,
and you may want to put some cheesecloth over the container to keep out dust and critters. |
Could I just use a small alum crystal as a seed and just submerge it into a saturated solution at room temperature to make a bigger crystal of
manganese sulfate?
[Edited on 29-7-2016 by 7lanthanum]
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j_sum1
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Why wouldn't you use a crystal of manganese sulfate as a seed? I don't get your logic here. A piece of rock would be as good as an alum crystal if
you need a nucleation site. If you want to force a highly regular crystal you need to have a seed crystal with the exact same crystal parameters as
the chemical you are crystallising -- ie, the same compound.
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NEMO-Chemistry
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| Quote: Originally posted by zts16 | | Manganese(II) sulfate isn't deliquescent. I recrystallized some impure stuff over a year ago, but I just boiled it down to get a pale pink powder
rather than letting it all crystallize slowly. It hasn't absorbed any water since then, and it's just in a regular jar. If you want to make decent
crystals of it, just leave a beaker of it in solution out in the sun. The water will evaporate and it will crystallize. It could take a while though,
and you may want to put some cheesecloth over the container to keep out dust and critters. |
I was just going from wikipeadia here
https://en.wikipedia.org/wiki/Manganese(II)_sulfate
"Manganese(II) sulfate usually refers to the inorganic compound with the formula MnSO4·H2O. This pale pink deliquescent solid is a
commercially significant manganese(II) salt"
Goes to show why i dont rely on wikipedia and would rather ask than trust a question here than trust it
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7lanthanum
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| Quote: Originally posted by j_sum1 | | Why wouldn't you use a crystal of manganese sulfate as a seed? I don't get your logic here. A piece of rock would be as good as an alum crystal if
you need a nucleation site. If you want to force a highly regular crystal you need to have a seed crystal with the exact same crystal parameters as
the chemical you are crystallising -- ie, the same compound. |
Um, did you read my post? I CAN'T make manganese (II) sulfate seed crystals.
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blogfast25
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Yes, you can.
Dip a glass stirring rod into your solution, then dry it in hot air (way above a Bunsen flame, e.g.) A small deposit of MnSO4 crystals will
form. Repeat if there's not enough and scrape them off with a spatula or similar.
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7lanthanum
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| Quote: Originally posted by blogfast25 |
Yes, you can.
Dip a glass stirring rod into your solution, then dry it in hot air (way above a Bunsen flame, e.g.) A small deposit of MnSO4 crystals will
form. Repeat if there's not enough and scrape them off with a spatula or similar. |
I'll try that
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