Scientists uncover unprecedented alloy in debris from Hiroshima atomic blast

A team led by Luca Bindi of the University of Florence has isolated a previously unknown metallic alloy within micrometer-scale particles retrieved from the shores of Hiroshima Bay, where the 1945 atomic bomb detonated. The alloy, composed of iron, chromium, nickel, manganese, molybdenum, silicon and aluminum, forms a homogeneous cubic crystal structure that defies the simpler configurations expected under normal conditions.

Bindi describes each droplet as an independent experiment, forged in the instantaneously super-heated and rapidly cooling environment of the blast. Although not a quasicrystal, the alloy’s atomic arrangement resembles patterns found in quasiperiodic materials, offering clues to their formation. Physicist Michael Widom, who has collaborated with Bindi, suggests the discovery points to a largely unexplored realm of exotic substances created by extreme events such as meteor impacts or lightning strikes.

The research, published in Science Advances, raises questions about whether such materials are isolated curiosities or part of a wider, systematic class. Understanding these compounds could expand knowledge of matter formation under extreme conditions.