At 5:29am on July 16, 1945, humanity entered a dangerous new era as the world’s very first nuclear explosion blossomed over New Mexico.
As the blast, known as the Trinity nuclear test, vaporised the surrounding desert, it also created something incredible.
Scientists have discovered that the ferocity of this nuclear explosion forged an ‘impossible’ crystal.
Researchers say this bizarre substance is like nothing else on the planet and is the first of its kind to have been formed by a nuclear blast.
During the Trinity test, engineers from the Manhattan Project detonated a plutonium implosion device known simply as ‘The Gadget’.
The energy released was equivalent to 21,000 tonnes of TNT, and instantly disintegrated the 98–foot (30 metre) test tower and copper infrastructure.
The nuclear fireball swept up and fused the tower, measuring instruments, and desert sand, raining down molten blobs of an entirely new mineral known as Trinitite.
Once prized as a morbid souvenir, scientists have now found that this strange mineral contains crystal structures that should have never been able to form on Earth.
Scientists say that the Trinity nuclear tests forged a new type of crystal inside the nuclear glass known as Trinitite
The intense heat and rapid cooling created by the Trinity test created a form of crystal structure that could not have formed on Earth otherwise and cannot even be replicated in laboratories
In a new paper, published in Proceedings of the National Academy of Sciences, researchers investigated crystals that formed inside a particularly rare red form of Trinitite, which contains traces of metal from the tower and equipment.
Inside a chunk of red Trinitite, the researchers uncovered a type of crystal structure called a clathrate.
These are made up of silicon atoms arranged in a cage–like lattice, each trapping a single calcium atom inside.
These structures are very special because they require extremely specific conditions to form, and are rarely found in nature.
Co–author Professor Michael Widom, of Carnegie Mellon University, told the Daily Mail: ‘Their energies are far above what would normally be feasible to form at naturally occurring temperatures and pressures.’
Professor Widom adds that it is ‘unlikely that they could even be formed in a laboratory’.
Crystals normally form in stable environments, like large, flaky salt crystals forming in water as it slowly evaporates.
However, extremely rapid shocks can sometimes create very unusual forms of crystal that don’t appear anywhere else.
The crystal is a type of structure called a clathrate, which is a cage–like lattice of atoms trapping another atom inside
Lead author Dr Luca Bindi, of the University of Florence, told the Daily Mail: ‘The clathrate we discovered formed under a highly nonequilibrium environment involving extreme temperatures, high pressures, rapid cooling, and a very unusual chemical mixture rich in silicon, copper, and calcium.
‘On Earth, such conditions are exceptionally rare, but they can occur in extraordinary events such as nuclear detonations, lightning strikes, or meteorite impacts.’
Temperatures likely exceeded 1,500°C and pressures reached several gigapascals, while large amounts of desert sand and copper from the tower infrastructure were vaporised and mixed together.
The material then cooled extremely rapidly, allowing the crystals to form in a highly unusual arrangement.
Professor Bindi says: ‘The nuclear blast essentially ‘froze in’ an otherwise inaccessible atomic arrangement before it could transform into more stable phases.
That means Trinitite is essentially a moment frozen in time, locking a snapshot of the brief temperature and pressure conditions inside the blast.
Those unique characteristics are what make these unusual minerals such a treasure trove for mineralogists.
Professor Bindi calls the extreme conditions of nuclear blasts, meteor impacts, and lightning strikes ‘natural laboratories’ for finding previously unknown minerals.
The clathrate forged by the Trinity blast is a cage of silicon atoms that traps a calcium atom inside. The researchers say this structure was ‘frozen in’ during the explosion
Although this discovery is more important from a fundamental scientific perspective, it could open the door to more practical inventions.
Professor Bindi explains that clathrates are of ‘great interest’ to scientists because they exhibit unusual thermal and electrical qualities, including superconductivity and efficient thermoelectric behaviour.
Discovering this new type of crystal could help guide the search for more useful materials.
Professor Bindi adds: ‘More broadly, the study shows that extreme environments can generate novel structures that conventional synthesis methods may miss, potentially opening pathways to entirely new classes of functional materials.’
