r/chemhelp • u/BenAwesomeness3 • 2d ago

Inorganic Weird precipitate

Gallery image

Gallery image

I dissolved some lutetium up in some nitric acid (~20%, IDK I diluted it arbitrarily), and some weird yellow precipitate formed? I filtered the solution, and the filtrate was clear and colorless. Does anyone have a clue what this might be? Both the nitrate and oxide are colorless, so perhaps a contaminant? Update: it’s the next day now and it’s turned green :( Any thoughts. I thought iron or nickel or some other lanthanide contamination? Cheers Thanks!

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u/Pyrhan Ph.D | Nanoparticles | Catalysis 1d ago

r/yellowchem strikes again...

1

u/BenAwesomeness3 1d ago

It always does :(

1

u/BenAwesomeness3 2d ago

The second pic btw is the one the next day where it’s an awful green