Amorphous polymorphism

Peter H. Poole; Tor Grande; F. Sciortino; H. E. Stanley; Charles Angell

doi:10.1016/0927-0256(95)00044-9

Amorphous polymorphism

Peter H. Poole, Tor Grande, F. Sciortino, H. E. Stanley, Charles Angell

Molecular Sciences, School of (SMS)

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

Abstract

Recent studies of amorphous solid materials have revealed the possibility that more than one distinct amorphous phase may be formed from the same substance. In analogy with the phenomenon of crystalline polymorphism, this behavior has been termed "amorphous polymorphism". We review the experimental manifestation of amorphous polymorphism, especially in tetrahedrally coordinated materials such as H₂O and SiO₂. Guided by computer simulation results on these substances we show how a thermodynamic explanation of these phenomena is possible, specifically that amorphous polymorphism occurs in substances where the thermodynamic behavior of the liquid state exhibits liquid-liquid phase separation, or a tendency toward it. We identify a number of systems which may also display amorphous polymorphism, and emphasize the central role to be played by computer simulation in the elucidation of this phenomenon.

Original language	English (US)
Pages (from-to)	373-382
Number of pages	10
Journal	Computational Materials Science
Volume	4
Issue number	4
DOIs	https://doi.org/10.1016/0927-0256(95)00044-9
State	Published - Nov 1995

ASJC Scopus subject areas

General Computer Science
General Chemistry
General Materials Science
Mechanics of Materials
General Physics and Astronomy
Computational Mathematics

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10.1016/0927-0256(95)00044-9

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title = "Amorphous polymorphism",

abstract = "Recent studies of amorphous solid materials have revealed the possibility that more than one distinct amorphous phase may be formed from the same substance. In analogy with the phenomenon of crystalline polymorphism, this behavior has been termed {"}amorphous polymorphism{"}. We review the experimental manifestation of amorphous polymorphism, especially in tetrahedrally coordinated materials such as H2O and SiO2. Guided by computer simulation results on these substances we show how a thermodynamic explanation of these phenomena is possible, specifically that amorphous polymorphism occurs in substances where the thermodynamic behavior of the liquid state exhibits liquid-liquid phase separation, or a tendency toward it. We identify a number of systems which may also display amorphous polymorphism, and emphasize the central role to be played by computer simulation in the elucidation of this phenomenon.",

author = "Poole, {Peter H.} and Tor Grande and F. Sciortino and Stanley, {H. E.} and Charles Angell",

year = "1995",

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TY - JOUR

T1 - Amorphous polymorphism

AU - Poole, Peter H.

AU - Grande, Tor

AU - Sciortino, F.

AU - Stanley, H. E.

AU - Angell, Charles

PY - 1995/11

Y1 - 1995/11

N2 - Recent studies of amorphous solid materials have revealed the possibility that more than one distinct amorphous phase may be formed from the same substance. In analogy with the phenomenon of crystalline polymorphism, this behavior has been termed "amorphous polymorphism". We review the experimental manifestation of amorphous polymorphism, especially in tetrahedrally coordinated materials such as H2O and SiO2. Guided by computer simulation results on these substances we show how a thermodynamic explanation of these phenomena is possible, specifically that amorphous polymorphism occurs in substances where the thermodynamic behavior of the liquid state exhibits liquid-liquid phase separation, or a tendency toward it. We identify a number of systems which may also display amorphous polymorphism, and emphasize the central role to be played by computer simulation in the elucidation of this phenomenon.

AB - Recent studies of amorphous solid materials have revealed the possibility that more than one distinct amorphous phase may be formed from the same substance. In analogy with the phenomenon of crystalline polymorphism, this behavior has been termed "amorphous polymorphism". We review the experimental manifestation of amorphous polymorphism, especially in tetrahedrally coordinated materials such as H2O and SiO2. Guided by computer simulation results on these substances we show how a thermodynamic explanation of these phenomena is possible, specifically that amorphous polymorphism occurs in substances where the thermodynamic behavior of the liquid state exhibits liquid-liquid phase separation, or a tendency toward it. We identify a number of systems which may also display amorphous polymorphism, and emphasize the central role to be played by computer simulation in the elucidation of this phenomenon.

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Amorphous polymorphism

Abstract

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