During the Trinity nuclear test on July 16, 1945, in the New Mexico desert, the world’s first test of an atomic bomb, a new material formed on its own. It was discovered only recently by an international research team led by geologist Luca Bindi at the University of Florence, which identified the unusual clathrate made of calcium, copper, and silicon. It is a substance never before seen either in nature or as a man-made compound produced in a laboratory.
What Are Clathrates?
The term “clathrates” refers to materials with a cage-like structure that traps other atoms or molecules inside, giving them distinctive properties. Of great technological interest, these materials are being studied for various uses, from energy conversion (as thermoelectric materials that can turn heat into electricity) to the creation of new semiconductors, as well as gas and hydrogen storage for future energy technologies.
The New Material
To find the new material, researchers examined trinitite, a silicate glass containing rare metallic phases. Using techniques such as x-ray diffraction, the team identified a type I clathrate made of calcium, copper, and silicon within a tiny copper-rich metal droplet embedded in a piece of red trinitite.
The researchers say the new material formed spontaneously during a nuclear explosion. This shows that extreme conditions, like very high temperatures and pressures, can produce new materials that are impossible to make by conventional means.
Natural Laboratories
The discovery is even more intriguing because, in the same detonation, another very rare material was formed: a silicon-rich quasicrystal, previously documented by Bindi’s team a few years ago.
A quasicrystal, as Bindi told WIRED at the time, is something that is not a crystal but looks quite similar. “Their peculiarity,” he said, “is that the atomic arrangement that is not periodic, but nearly so, creates incredible symmetries from which derive amazing physical properties, among other things, very difficult to predict.”
Establishing the connection between these structures helps scientists better understand how atoms arrange themselves under extreme conditions and expands the possibilities for designing new materials. “Events such as nuclear explosions, lightning strikes, or meteoritic impacts function as true natural laboratories,” the researchers explain. “They allow us to observe forms of matter that we cannot easily reproduce in the laboratory.”
In short, this research opens new paths for developing innovative technologies, showing that even destructive events can leave behind discoveries valuable for the future.
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