Ramiel - 10-8-2006 at 05:04
I recently made bis glycinato copper... Cu(gly)<sub>2</sub>.H<sub>2</sub>O by reaction of Cup. acetate with glycine. After the
reaction occured, the product was filtered and then heated under reflux for about an hour on a steam bath with some of the filtrate. Left to cool and
then filtered, the isomer of glycinato copper was what can only be described accuratly as a "crushed velvet" colour. It was dark blue and a wavy
chrome colour, very vivid. Now I know these compounds are called cinato after their extreme colours, but what could have caused this metallic sheen to
a crystalline salt? any guesses here... I'm stumped!
p.s. yes, it was very well dried, thank you! and no impurities were present 
The_Davster - 10-8-2006 at 05:11
I also once obtained a metallic sheen on a precipitate I filtered. The precipitate was neodymium carbonate, and dissapaeared in a following batch
when it was washed better.
Or perhaps in this case it is the copper in the compound oxidizing or something.
Nick F - 10-8-2006 at 05:18
Can you get a picture? It'd help to explain what you mean...