Researchers have recently measured the precise melting temperature of diamond using a high‑pressure laser experiment, finding it to be 6727°C—roughly 700°C lower than the previously accepted figure. This breakthrough resolves a two‑decade‑old discrepancy between experimental data and theoretical models.

The study employed laser‑induced shock waves to heat and compress diamond samples beyond solar surface temperatures and the core pressures of Uranus and Neptune. X‑ray diffraction confirmed that diamond does not transform into any other solid carbon allotrope before melting, instead becoming a liquid carbon phase.

At pressures between 660 and 1060 gigapascals, the diamond remains solid until it reaches 6727°C, where it turns into a metallic‑looking liquid that can conduct electricity and even be denser than diamond itself.

Why This Matters

BozokMedia analysis shows that this accurate temperature measurement will refine nuclear fusion models, where diamond capsules are used to contain deuterium and tritium at extreme pressures and temperatures. It also enhances our understanding of ice‑giant planets, where liquid carbon oceans may host floating diamonds.

“This discovery opens new avenues for both energy research and astrophysics,” says Dr. Marius Milot, lead scientist at Lawrence Livermore National Laboratory.

Frequently Asked Questions

Q1: Can diamond melt under normal Earth conditions?
A1: No, it requires temperatures above 7000°C and extremely high pressures to melt.

Q2: How does this affect nuclear fusion research?
A2: It provides precise parameters for the diamond capsules used to compress fusion fuel, improving experimental outcomes.