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Issue 24, 2001
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A second distinct structural state of high-density amorphous ice at 77 K and 1 bar

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Abstract

High-density amorphous ice (HDA), further densified on isobaric heating from 77 K to 165 (177) K at 1.1 (1.9) GPa, relaxes at 77 K and 1 bar to the same structural “state” with a density of 1.25 ± 0.01 g cm−3. Its density is higher by ≈9% than that of HDA, and thus it is called very-high-density amorphous ice (VHDA). X-ray diffractogram and Raman spectrum of VHDA clearly differs from that of HDA, and the hydrogen-bonded O–O distance increases from 2.82 Å in HDA to 2.85 Å in VHDA. Implications for the polyamorphism of the amorphous forms of water are discussed.

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Article information


Submitted
24 Sep 2001
Accepted
23 Oct 2001
First published
21 Dec 2001

Phys. Chem. Chem. Phys., 2001,3, 5355-5357
Article type
Communication

A second distinct structural state of high-density amorphous ice at 77 K and 1 bar

T. Loerting, C. Salzmann, I. Kohl, E. Mayer and A. Hallbrucker, Phys. Chem. Chem. Phys., 2001, 3, 5355
DOI: 10.1039/B108676F

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