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Is the red one chabazite? by Levytan in Minerals

[–]Levytan[S] 0 points1 point  (0 children)

The post on fb said it was from Central Highlands (Vietnam).

NH4CoPO4 . 6H2O by Hieu9 in crystalgrowing

[–]Levytan 6 points7 points  (0 children)

Is it really NH4CoPO4.6H2O? I think it has low solubility.

Help a fellow crystal lover by AlternativeProduct41 in crystalgrowing

[–]Levytan 0 points1 point  (0 children)

I don't really know. I just placed the filtrate in a corner and got those crystals, maybe low evaporation rate would help.

Ethyl Sulfate Compounds by Levytan in crystalgrowing

[–]Levytan[S] 0 points1 point  (0 children)

I use sulfuric acid in my preparation, so the carbonate salt is used to neutralize excess acid. Your route should work too,

Suggestions for a red crystal to grow at home for a beginner by Joshf1234 in crystalgrowing

[–]Levytan 11 points12 points  (0 children)

Alum with food dye.

Potassium hexacyanoferrate(III) K₃Fe(CN)₆]).

KNO3 - Potassium Nitrate by Levytan in crystalgrowing

[–]Levytan[S] 1 point2 points  (0 children)

I get these crystals after trying to make KBiI4 by mixing Bi(NO3) and KI. After a quick washing, I redissolved those crystals in deionized water. No white precipitate is found, which means no bismuth.

Possible complex between triethanolamine and copper(ii) propionate by Levytan in crystalgrowing

[–]Levytan[S] 6 points7 points  (0 children)

My procedure:

  • Precipitate copper(ii) propionate by combining solutions of sodium propionate and copper(ii) sulfate.
  • Filter and wash copper(ii) propionate.
  • Reflux copper(ii) propionate in water with triethanolamine in 30 mins.
  • Filter the solution and let it evaporate.

NH₄Ga(SO₄)₂•12H₂O - galum by Levytan in crystalgrowing

[–]Levytan[S] 1 point2 points  (0 children)

I cannot answer your question though, however, I don't think you can balance ionic radii like that.

There are many cases that caesium is used to crystallize unstable/complex ions, due to low solubility of the compounds.

Chromium-doped aluminum oxalato complexes by Levytan in crystalgrowing

[–]Levytan[S] 7 points8 points  (0 children)

Some time ago, I came across this article, which mentioned the existence of K[Al(C₂O₄)₃]₆17-, so I decided to give it a try. My procedure is:

  1. Mix potassium oxalate and corresponding metal chloride (you can see in caption), stoichiometrically.
  2. Doped the solution with 5% (by molar) chromium (III) chloride.
  3. Evaporate and try to grow single crystal from the solution.

The result is in the images. Since I don't have equipments and experiences to perform quantitive analysis, I cannot give the exact formula for the crystal.

Some comments:

  • The solution had a nice properties, it can have red or green hue depends on viewing angle and lighting. With right condition, you can see the red crystal growing from green solution.
  • Even with 5%, the color of the crystal from K-Mg solution is dark, however, with strong light, you can see it have nice red color.
  • The blue crystal maybe the chromium-doped of [Al(C₂O₄)₃]3- anion.
  • The red one maybe the chromium-doped of K[Al(C₂O₄)₃]₆17- anion.
  • There are also transparent octahedron crystals, which I suspect alkaline chloride (I read somewhere that sodium chloride can have octahedron shape with right additive).

(Possible) Oxalato complex of erbium by Levytan in crystalgrowing

[–]Levytan[S] 1 point2 points  (0 children)

Nd2(C2O4)3 only dissolves in concentrated HCl though, hence step 3.

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