2001/12/20 by Thomas Loerting, Christoph G. Salzmann, Ingrid Kohl +2 · 1 citation
Materials Science · Earth and Planetary Sciences · #Material Dynamics and Properties #Glass properties and applications #Geology and Paleoclimatology Research
paper · doi:10.1039/b108676f
openalex publication_date 2001/12/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
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.