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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2011, Volume 94, Issue 8, Pages 662–667
(Mi jetpl2360)
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This article is cited in 13 scientific papers (total in 13 papers)
CONDENSED MATTER
Structural transitions in ice samples at low temperatures and pressures
V. B. Efimov, A. N. Izotov, A. A. Levchenko, L. P. Mezhov-Deglin, S. S. Khasanov Institute of Solid State Physics, Russian Academy of Sciences
Abstract:
The structure of ice samples formed in the decay of a water impurity gel at temperatures above $4$ K and atmospheric pressure has been examined. The X-ray diffraction analysis indicates that three phases coexist in the initial sample at temperatures of $85$–$110$ K. These phases are amorphous ice occupying up to $30\%$ of the sample volume, cubic-phase ice $I_c$ metastable at low pressures ($\sim60\%$), and normal hexagonal ice $I_h$ ($\leq 6\%$). The characteristic sizes of crystals of the cubic and hexagonal phases are about $6$ and $30$ nm, respectively. The amorphous phase at annealing above $110$ K is gradually transformed to the crystalline phase both cubic and hexagonal. This transition is accompanied by two processes, including a fast increase in the sizes of cubicphase nanocrystals and the partial transition of the cubic phase $I_c$ to the hexagonal one $I_h$. Hexagonal ice $I_h$ prevails in the bulk of the sample above $200$ K.
Received: 29.08.2011
Citation:
V. B. Efimov, A. N. Izotov, A. A. Levchenko, L. P. Mezhov-Deglin, S. S. Khasanov, “Structural transitions in ice samples at low temperatures and pressures”, Pis'ma v Zh. Èksper. Teoret. Fiz., 94:8 (2011), 662–667; JETP Letters, 94:8 (2011), 621–625
Linking options:
https://www.mathnet.ru/eng/jetpl2360 https://www.mathnet.ru/eng/jetpl/v94/i8/p662
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