Overview
- The peer‑reviewed study, published Monday in PNAS, reports a previously unknown calcium–copper–silicon clathrate formed during the Trinity nuclear detonation.
- This type‑I clathrate has a cubic lattice of silicon cages that trap calcium atoms, with small amounts of copper and iron also present.
- Researchers found the crystal inside a copper‑rich metallic droplet embedded in red trinitite and verified its structure with nanoscale imaging and single‑crystal X‑ray diffraction.
- Modeling indicates the clathrate formed under brief extremes of heat above about 1,500 °C, pressures of several gigapascals, and rapid cooling, creating a metastable phase that standard synthesis cannot produce.
- The team concludes such blasts act as rare natural laboratories, a lesson that could guide materials design, aid nuclear forensics, and inform studies of other high‑energy events like lightning strikes and meteorite impacts.