mineral

Scientists have discovered a new mineral that matches the composition of kryptonite, the mythical rock that could sap Superman's strength in comic books.The rock — named jadarite — was discovered in a mine in Jadar, Serbia, by the Rio Tinto company and identified by London's Natural History Museum.Though the white rock didn't resemble anything known to real-life man, it did match the one substance known to destroy Superman's power.The new mineral does not contain fluorine and is white rather than green, but in all other respects the chemistry matches that for the rock containing kryptonite.The mineral is sodium lithium boron silicate hydroxide, which "probably won't do Superman or us any harm whatsoever.