Physicists Recreate Neptune Diamond Formation With 2 Shockwaves in Lab
Updated
Updated · spacedaily.com · Jun 11
Physicists Recreate Neptune Diamond Formation With 2 Shockwaves in Lab
1 articles · Updated · spacedaily.com · Jun 11
Summary
A 2017 SLAC experiment reproduced the key chemical step behind suspected diamond rain on Neptune and Uranus, showing carbon in a plastic sample crystallizing into diamond under ice-giant-like pressure and heat.
Using a thin sheet of polystyrene, Dominik Kraus's team drove 2 overlapping shockwaves through the material and probed it with the Linac Coherent Light Source X-ray laser before the sample disintegrated.
X-ray data showed nearly every carbon atom in the overlap zone separating from hydrogen and forming nanometer-scale diamond lattices, directly supporting decades-old models of hydrocarbon breakup deep inside ice giants.
The result does not prove diamonds have been observed falling inside Neptune; it confirms the process is physically plausible under relevant conditions, while the depth, temperature range and scale remain model-dependent.
That matters beyond gemstones because sinking diamond could release heat inside Uranus and Neptune, planets still known mainly from Voyager 2's 1989 flyby and remote measurements.
If Neptune and Uranus are actually 'rock giants,' does diamond rain still happen inside them?
How does this planetary diamond rain forge the bizarre magnetic fields of distant worlds?
Diamond Rain in Uranus and Neptune: 2024 Advances, Laboratory Insights, and Industrial Applications
Overview
Diamond rain is a remarkable process believed to occur deep inside ice giants like Uranus and Neptune, where immense pressures cause carbon compounds to transform into diamonds that then sink toward the core. This phenomenon is key to understanding the internal dynamics and composition of these distant worlds. Scientists have tried to recreate these extreme conditions in the lab, but experiments have faced challenges, especially in matching the precise conditions needed for diamond formation. Recent breakthroughs are helping to clarify these processes, improving our models of how diamond rain shapes the interiors and evolution of ice giants.