Chromium(III) Telluride (Cr 2 Te 3) is an interesting material for (ferro)magnetic applications, with Yao Wen and colleagues reporting in a 2020 Nano Letters paper that they confirmed it to show ...

and violet anhydrous chromium(III) chloride. The last of these compounds shows an amazing property when hydrated. Its colour changes between pale green, dark green and violet depending on how many of ...