http://news.yahoo.com/s/ap/20070424...e_discovery;_ylt=AltXlnm8xmK0P0y1_dW5NeXMWM0F
New mineral has kryptonite composition
LONDON - A mineral recently discovered in Serbia has the same composition as kryptonite — the fictional substance that robs Superman of his powers — the British Museum said Tuesday. While the material is not a perfect match, its chemical breakdown is strikingly similar.
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"Towards the end of my research I searched the Web using the mineral's chemical formula, sodium lithium boron silicate hydroxide, and was amazed to discover that same scientific name written on a case of rock containing kryptonite stolen by Lex Luthor from a museum in the film 'Superman Returns,'" Stanley said.
The material is white, powdery and not radioactive — unlike the glowing green crystals usually depicted in the Superman comics. It will be formally named Jadarite when it is described in the European Journal of Mineralogy later this year.