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Hidden Nanocrystals Found in Universe’s Most Common Ice

The finding challenges the belief that space ice is purely amorphous.

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Ice in Space Could Do Something We Thought Was Impossible

Overview

  • Computer simulations of low-density amorphous ice matched X-ray diffraction data only when models included about 20% crystalline regions.
  • Re-crystallization experiments showed that ice samples retain structural memory of their formation, providing direct evidence of embedded nanocrystals.
  • Partial crystallinity in space ice overturns assumptions about its role in planet formation, galactic evolution and interstellar matter transport.
  • A reduced amorphous matrix may limit the capacity of ice to trap and ferry prebiotic molecules, raising questions for panspermia theories.
  • The discovery has broad implications for materials science, suggesting that identifying and removing hidden crystals could enhance the performance of glass fibers and other amorphous technologies.