From: del@branta.demon.co.uk   
      
   On Fri, 23 Jul 2004, in sci.space.tech,   
   Renee Keller  said:   
      
   >"sanman"  wrote in message   
   >> Apparently, some researchers have found a way to turn pure Zirconium   
   >> into a bulk metallic glass by using tremendous pressure. Right now, it   
   >> only seems to work with high purity Zr.   
      
   >Have you ever seen "Privacy Windows"?  These are glass that when an   
   >electric current is passed through them, the electrons all line up and   
   >make it transparent.  Otherwise they are opaque.  So could something   
   >similar be done with other materials?   
      
   Metallic glasses are never transparent, they still have the opacity and   
   shiny surface you would associate with metals.  It's the highly mobile   
   electrons that do that, and that doesn't change whether the material is   
   crystalline or amorphous.   
      
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   Del Cotter   
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