The mechanisms for pressure-induced amorphization of ice Ih

Tse, John S.; Klug, D. D.; Tulk, C. A.; Swainson, I. P.; Svensson, E. C.; Loong, C.‐K.; Shpakov, V. P.; Belosludov, V. R.; Belosludov, Rodion V.; Kawazoe, Yoshiyuki

doi:10.1038/23216

Cited by 172 publications

(129 citation statements)

References 22 publications

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“…In contrast, the occurrence of HDA along the extrapolated melt line of ice VII (Fig. 1) resembles the ice Ih-to-HDA transition (4,5), underscoring the fundamental role of mechanical instability in triggering the appearance of metastable structures within the Born criteria (6,8,9,32,33,40,41).…”

Section: Resultsmentioning

confidence: 93%

“…The absence of HDA at higher temperatures was attributed to a relaxation process that precluded HDA formation above the crystalline temperature. However, other studies examined the LDA-to-HDA transition from the standpoint of a mechanical instability of the ice I structure above 1 GPa (6,8,9). Indeed, the earlier studies (32,33) pointed out that the two mechanisms are related in the pressure-induced amorphization of SiO 2 .…”

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confidence: 99%

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High density amorphous ice at room temperature

Chen

Yoo

2011

Proc. Natl. Acad. Sci. U.S.A.

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The phase diagram of water is both unusual and complex, exhibiting a wide range of polymorphs including proton-ordered or disordered forms. In addition, a variety of stable and metastable forms are observed. The richness of H 2 O phases attests the versatility of hydrogen-bonded network structures that include kinetically stable amorphous ices. Information of the amorphous solids, however, is rarely available especially for the stability field and transformation dynamics-but all reported to exist below the crystallization temperature of approximately 150-170 K below 4-5 GPa. Here, we present the evidence of high density amorphous (HDA) ice formed well above the crystallization temperature at 1 GPa-well inside the so-called "no-man's land." It is formed from metastable ice VII in the stability field of ice VI under rapid compression using dynamic-diamond anvil cell (d-DAC) and results from structural similarities between HDA and ice VII. The formation follows an interfacial growth mechanism unlike the melting process. Nevertheless, the occurrence of HDA along the extrapolated melt line of ice VII resembles the ice Ih-to-HDA transition, indicating that structural instabilities of parent ice VII and Ih drive the pressure-induced amorphization.dynamic-DAC | rapid solidication | high pressure kinetics | metastability A bundant in nature, water is a major constituent of planets and living organisms alike. The phase diagram of water exhibits a large number of polymorphs with great diversity in crystalline structure, chemical bonding, and collective interactions (1-3). The hydrogen-bond angles and topology of relatively weak hydrogen bonds (with respect to covalent OH bonds) are subject to large distortions, which, in turn, lead to proton and structural disorders and myriad phases-both stable and metastable (including amorphous). In addition to a large number (approximately 15) of known solid phases of H 2 O, there are many metastable phases. The metastable phases include both crystalline and disordered solids: high-and low-density amorphous (HDA and LDA) at low temperatures (4-11), high-and low-density water (HDW and LDW) (12), as well as crystalline phases of ice IV (13) near the melting line, VII (14) observed in the stability field of ice VI, VII′ (6,15,16) in the ice VIII stability field, and ice III in the ice II field (17). This is in addition to a whole series of intermediate structures arising from amorphorization, dipoleordering transitions, and symmetrization of hydrogen bonding (4, 5, 18). The strength of hydrogen bonds varies in these metastable structures, as does the transition dynamics that is not well understood.Recently, a very high density form of amorphous ice (VHDA) was found by isobaric annealing of HDA at 177 K and 1.9 GPa (7,19). The presence of VHDA is characterized from HDA by its high density-not by the network structure. In fact, the VHDA is a topologically isomorphic phase to HDA, arising from the different interstitial occupancy of oxygen atoms. In this regard, there could be many intermedi...

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Section: Resultsmentioning

confidence: 93%

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confidence: 99%

High density amorphous ice at room temperature

Chen

Yoo

2011

Proc. Natl. Acad. Sci. U.S.A.

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“…Such a nano-crystalline scenario has been discussed for water [56] but also for other systems showing amorphous polymorphism [57]. A discontinuity between the liquid state, vapour deposited and hyper-quenched amorphous water on the one hand and LDA on the other hand has been indeed postulated based on theoretical concepts and results from spectroscopic experiments and computer simulations [58,59,60,61]. Giving the subject some further thinking it becomes, however, obvious that a nano-crystalline scenario does not provide a more stringent explanation for the absence of glassy features in the dynamics.…”

Section: Introductionmentioning

confidence: 99%

Absence of molecular mobility on nano-second time scales in amorphous ice phases

Koza

Geil

Schober

et al. 2005

Phys. Chem. Chem. Phys.

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“…X-ray and neutron diffraction experiments play a key role in the characterization of the amorphous states of ice. The caveat in interpreting data deduced from static scattering methods is that it is hard to discriminate between an amorphous, but nanocrystalline material (unrelated to liquids) 74,75 and an amorphous, glassy material (continuously connected to the liquid via the glass transition). Both 30 cases do not show long range correlation in their powder pattern.…”

Section: Structure Of Water In the Liquid Statementioning

confidence: 99%

X-ray and Neutron Scattering of Water

et al. 2016

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International audienceThis review article focuses on the most recent advances in X-ray and neutron scattering studies of water structure, from ambient temperature to the deeply supercooled and amorphous states, and of water diffusive and collective dynamics, in disparate thermodynamic conditions and environments. In particular, the ability to measure X-ray and neutron diffraction of water with unprecedented high accuracy in an extended range of momentum transfers has allowed the derivation of detailed O–O pair correlation functions. A panorama of the diffusive dynamics of water in a wide range of temperatures (from 400 K down to supercooled water) and pressures (from ambient up to multiple gigapascals) is presented. The recent results obtained by quasi-elastic neutron scattering under high pressure are compared with the existing data from nuclear magnetic resonance, dielectric and infrared measurements, and modeling. A detailed description of the vibrational dynamics of water as measured by inelastic neutron scattering is presented. The dependence of the water vibrational density of states on temperature and pressure, and in the presence of biological molecules, is discussed. Results about the collective dynamics of water and its dispersion curves as measured by coherent inelastic neutron scattering and inelastic X-ray scattering in different thermodynamic conditions are reported

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The mechanisms for pressure-induced amorphization of ice Ih

Cited by 172 publications

References 22 publications

High density amorphous ice at room temperature

High density amorphous ice at room temperature

Absence of molecular mobility on nano-second time scales in amorphous ice phases

X-ray and Neutron Scattering of Water

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