Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Q: Transparency in phase change alloys

  1. Oct 25, 2004 #1

    I was wondering if anyone could explain the following:
    The technology behind CD-RW discs relies upon phase change alloys usually comprising of indium, silver, tellurium, and antimony. These are translucent in their crystalline state but opaque in their amorphous state. I understand why glass - an amorphous material, is largely transparent, but why is this alloy 'the other way round' - how is it that the crystalline state is translucent?
    Any answer would be gratefully received.

  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted