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Related Experiment Video

Updated: Sep 14, 2025

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident

Published on: December 14, 2017

Superheating gold beyond the predicted entropy catastrophe threshold.

Thomas G White¹, Travis D Griffin², Daniel Haden²

¹Department of Physics, University of Nevada, Reno, NV, USA. tgwhite@unr.edu.

|July 23, 2025

Summary

This summary is machine-generated.

Researchers experimentally challenged the theoretical

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Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica

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Area of Science:

Materials Science
Thermodynamics
Solid-State Physics

Background:

The 'entropy catastrophe' theory predicts an upper limit for solid stability.
This limit is theoretically around three times the melting point.
Intermediate destabilizing events (catastrophes) prevent reaching this theoretical limit.

Purpose of the Study:

To experimentally investigate the ultimate stability limit of superheated crystals.
To test the 'entropy catastrophe' threshold under extreme conditions.
To explore the dynamics of melting under ultrafast heating.

Main Methods:

Utilized ultrafast heating techniques.
Employed high-resolution inelastic X-ray scattering to track lattice temperature.
Experimentally tested gold samples under extreme temperature conditions.

Main Results:

Gold samples were heated to over 14 times their melting point while maintaining crystalline structure.
The observed superheating limit significantly surpassed the predicted 'entropy catastrophe' threshold.
Samples did not expand on the very short timescales studied, differing from prior estimates.

Conclusions:

The experimental results suggest a substantially higher or potentially nonexistent limit for superheating in solids.
Ultrafast heating conditions and timescale effects are critical factors in superheating dynamics.
This study provides new insights into the fundamental limits of solid material stability.