All articles tagged with #hiroshimaites
Researchers analyzing Hiroshima fallout found a silicon-rich iron-chromium grain that crystallizes in a rare AlAu4-type structure, a metastable alloy formed under the blast's extreme, rapid cooling—an unseen material hidden in nuclear debris.
Scientists studying Hiroshima fallout discovered a previously unknown iron–silicon alloy inside hiroshimaites, glassy particles formed in the fireball. The alloy’s structure is near-quasicrystalline and likely crystallized from rapidly cooled metallic vapors—a process not yet reproducible in labs. Similar blast-derived quasicrystals were found in Trinity’s trinitite, underscoring how extreme detonations can create unique materials. These materials serve as a time capsule for rapid alloy formation and could inform future alloy design and planetary impact research, per the Science Advances study led by Luca Bindi.
A glassy bead from Hiroshima Bay contains a microscopic grain that preserves a previously unknown silicon-rich alloy of iron, chromium, nickel, manganese, molybdenum, silicon, and aluminum, formed when city materials vaporized in the fireball and cooled rapidly. Using single-crystal X-ray diffraction, researchers found an ordered AlAu4-type structure, an unusual arrangement for iron-rich alloys, suggesting the blend of materials from urban debris can crystallize into exotic, highly ordered phases in seconds. While this could aid nuclear forensics by linking grains to blast conditions and temperatures, the finding is based on a single tiny grain and is not yet a practical alloy recipe.
A Science Advances study reports the discovery of a previously unknown, silicon-rich multicomponent alloy formed inside microscopic grains called ‘hiroshimaites’ created by the Hiroshima atomic blast. The highly ordered tiny crystal demonstrates that extreme, rapid quenching from nuclear detonations can forge new crystalline materials, potentially encoding diagnostic information about the device, environment, and detonation conditions, with implications for nuclear forensics and materials science.