The Hiroshima Bomb Created a Strange Alloy Never Seen on Earth From Vaporized Buildings and Metal
Scientists have discovered a unique, previously unknown silicon-rich alloy within glassy particles recovered from Hiroshima Bay. These 'hiroshimaites' were formed by the extreme heat of the 1945 atomic blast, which vaporized urban materials and fused them into a complex atomic structure.
Why it matters
This discovery provides new insights into the physical effects of atomic explosions and the formation of unique materials under extreme, rapid-cooling conditions.
A grain of metal scarcely wider than a red blood cell has preserved an atomic arrangement born in the fireball over Hiroshima.
Scientists found the particle inside a glassy droplet recovered from beach sands in Hiroshima Bay. It contains a previously unknown, silicon-rich alloy made from iron, chromium, nickel, manganese, molybdenum, silicon and aluminum — elements that most likely came from buildings and other urban materials vaporized when the atomic bomb exploded on that fateful day, August 6, 1945.
The discovery, reported in Science Advances , adds a new and unsettling chapter to the study of atomic-blast debris. For a few seconds, the huge atomic blast mixed familiar substances at extreme temperatures and then cooled them so quickly that atoms became locked into a complex, orderly structure not previously documented in an alloy anywhere on Earth.
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