I am not sure if you are jesting about the first link. Wikipedia is not always acccurate; but, if you read the second link more thoroughly -- focus on the thickness of the material as well as the use of the term "transparency". It is a more technical use of the term of "transparency" with respect to certain forms of radiations only
, in the wikipedia article, this would be specific soft X-ray -- not transparency to the entire "light" radiation sprectrum to render objects like glass, plexiglass or certain crystals "light transparent", in a layman's term. Also, the transparency to X-ray, described in the article, was transient (temporary state).
Most important the material itself is very thin (50nm)***; that is nanometer. Casing materials are around the millimeter (mm) give or take a few micrometers (um) in thickness.
Originally Posted by cnocbui
He got it wrong, transparency to light is not a property of amorphous metals. I think he saw the word 'glass' in the Wiki article and thought it implied transparency. Being prone to cracking and shattering like glass is a property.
Indeed, I was wondering if there were new "commericially" available transparent metal alloys that I was not aware of, especially as casing materials. So far, if they indeed exist, I have not seen them yet in my "window shoppings".
***The entire earth, however thick it is, for example is "transparent" to certain subparticles released by stars, like the sun.