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American Focus > Blog > Tech and Science > Gold Does Something Unexpected When Superheated Past Its Melting Point : ScienceAlert
Tech and Science

Gold Does Something Unexpected When Superheated Past Its Melting Point : ScienceAlert

Last updated: July 28, 2025 11:10 pm
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Gold Does Something Unexpected When Superheated Past Its Melting Point : ScienceAlert
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Gold’s Surprising Behavior Under Extreme Heat Challenges Existing Understanding

A recent study has revealed that gold can withstand intense heat beyond previously believed limits, leading to a potential reevaluation of how matter behaves under extreme conditions. This groundbreaking research was conducted by an international team of scientists using super-short laser blasts to push thin fragments of gold past a critical threshold known as the entropy catastrophe.

The entropy catastrophe is the point at which a solid material becomes too hot to resist melting, similar to a melting point but for unconventional scenarios where the laws of physics are challenged. Through a phenomenon called superheating, a solid substance can be heated so rapidly that its atoms do not have sufficient time to transition into a liquid state, allowing crystals to maintain their structure well beyond the standard melting point, albeit for a very brief period.

Traditionally, the entropy catastrophe was believed to occur at three times the standard melting point. However, utilizing a novel method for calculating the energy of reflected X-rays to accurately measure absorbed heat energy, the research team discovered that gold could withstand heat up to 14 times that limit before eventually liquefying.

The results of this study do not violate any laws of thermodynamics but rather demonstrate that under certain conditions, reactions can occur so rapidly that conventional thermodynamic principles do not apply. This phenomenon suggests that the atoms within gold are momentarily constrained, allowing thermal energy to dissipate before the material’s structure collapses.

Heated gold
Gold was heated many times beyond its melting point. (White et al., Nature, 2025)

During the experiment, the researchers were able to achieve a temperature of 19,000 Kelvin, with the gold maintaining its solid state for over 2 picoseconds. This extended duration prompted a reevaluation of existing models and led the researchers to propose a significantly higher threshold for the superheating of solids, challenging fundamental understandings of solid phase stability under extreme conditions.

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The implications of this discovery are profound for physicists, as it suggests that some solids may not have a definitive melting point when subjected to ultra-fast heating for extremely brief periods. This new knowledge is expected to have broad applications in various fields where rapid heating events occur, ranging from asteroid collisions in space to nuclear reactions on Earth.

Future studies aim to investigate if other solid materials exhibit similar behavior as gold and delve deeper into the entropy catastrophe, potentially reshaping the understanding of when solids transition into liquids. Physicist Thomas White from the University of Nevada expressed the need to revisit the concept of superheating limits, raising questions about the maximum temperature at which a material can withstand before melting.

The research findings have been published in Nature, marking a significant advancement in our comprehension of material behavior under extreme thermal conditions.

TAGGED:GoldmeltingPointScienceAlertSuperheatedunexpected
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