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Titolo:
Ice XII in its second regime of metastability
Autore:
Koza, MM; Schober, H; Hansen, T; Tolle, A; Fujara, F;
Indirizzi:
Univ Dortmund, Fachbereich Phys, D-44221 Dortmund, Germany Univ Dortmund Dortmund Germany D-44221 h Phys, D-44221 Dortmund, Germany Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France Inst Max Von Laue Paul Langevin Grenoble France F-38042 Grenoble, France Tech Univ Darmstadt, D-64289 Darmstadt, Germany Tech Univ Darmstadt Darmstadt Germany D-64289 D-64289 Darmstadt, Germany
Titolo Testata:
PHYSICAL REVIEW LETTERS
fascicolo: 18, volume: 84, anno: 2000,
pagine: 4112 - 4115
SICI:
0031-9007(20000501)84:18<4112:IXIISR>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
DENSITY AMORPHOUS WATER; POWDER DIFFRACTION; X-RAY; PRESSURE; PHASE; IX; AMORPHIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Koza, MM Univ Dortmund, Fachbereich Phys, D-44221 Dortmund, Germany Univ Dortmund Dortmund Germany D-44221 -44221 Dortmund, Germany
Citazione:
M.M. Koza et al., "Ice XII in its second regime of metastability", PHYS REV L, 84(18), 2000, pp. 4112-4115

Abstract

We present neutron powder diffraction results which give unambiguous evidence for the formation of the recently identified new crystalline ice phase [2], labeled ice XII, in completely different conditions. Ice XII is produced here by compressing hexagonal ice I-h at T = 77, 100, 140, and 160 K up to 1.8 GPa. It can be maintained at ambient pressure in the temperature range 1.5 < T < 135 K. Accurate structural properties are obtained from high-resolution diffraction carried our at T = 1.5 K. At T = 140 and 160 K additionally ice III/IX is formed. The increasing amount of ice III/IX with increasing temperature gives an upper limit of T approximate to 150 K for the successful formation of ice XII with the presented procedure.

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Documento generato il 07/07/20 alle ore 12:47:31