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1. en.wikipedia.org › wiki › Phases_of_icePhases of ice - Wikipedia

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   3 hours ago · Photograph showing details of an ice cube under magnification. Ice I h is the form of ice commonly seen on Earth. Phase space of ice I h with respect to other ice phases. Virtually all ice in the biosphere is ice I h (pronounced: ice one h, also known as ice-phase-one). Ice I h exhibits many peculiar properties that are relevant to the ...

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   Which porous ice has the largest internal cavity?

   • "An ultralow-density porous ice with the largest internal cavity identified in the water phase diagram". Proceedings of the National Academy of Sciences. 116 (26): 12684–12691. Bibcode: 2019PNAS..11612684L. doi: 10.1073/pnas.1900739116. PMC 6600908. PMID 31182582. ^ Chaplin, Martin. "Ice-seventeen (Ice XVII)".

   Phases of ice - Wikipedia

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   What is the structure of ice?

   • In the best-known form of ice, ice I h, the crystal structure is characterized by the oxygen atoms forming hexagonal symmetry with near tetrahedral bonding angles. This structure is stable down to −268 °C (5 K; −450 °F), as evidenced by x-ray diffraction and extremely high resolution thermal expansion measurements.

   Phases of ice - Wikipedia

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   What is ice XI?

   • Ice XI is the hydrogen-ordered form of the ordinary form of ice. The total internal energy of ice XI is about one sixth lower than ice I h, so in principle it should naturally form when ice I h is cooled to below 72 K.

   Phases of ice - Wikipedia

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   How does ice XIV form?

   • The formation of ice XIV from ice XII is more favoured at high pressure. When medium-density amorphous ice is compressed, released and then heated, it releases a large amount of heat energy, unlike other water ices which return to their normal form after getting similar treatment.

   Phases of ice - Wikipedia

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   What temperature did Tammann condense ice?

   • Having produced ice III, Tammann then tried condensing the ice at a temperature between −70 and −80 °C (203 and 193 K; −94 and −112 °F) under 200 MPa (2,000 atm) of pressure. Tammann noted that in this state ice II was denser than he had observed ice III to be.

   Phases of ice - Wikipedia

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   What is the crystal structure of ice IV?

   • 1981 research by Engelhardt and Kamb elucidated crystal structure of ice IV through a low-temperature single-crystal X-ray diffraction, describing it as a rhombohedral unit cell with a space group of R-3c.

   Phases of ice - Wikipedia

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