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The impact of temperature and unwanted impurities on slow compression of ice.

Christina M TonauerMarion BauerThomas Loerting
Published in: Physical chemistry chemical physics : PCCP (2021)
For slowly compressed hexagonal ice pressure-induced amorphisation to high-density amorphous ice (HDA) takes place below and at 130 K, but polymorphic transformation to ice IX takes place at 140-170 K. Stable ice II only forms above 170 K. Ice IX impurities trigger ice IX growth even at 120 K. HDA and ice IX are equally long-lived, where both can be regarded as metastable phases.
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