Polyamorphic systems: Difference between revisions
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*[[Roberts and Debenedetti model]] | *[[Roberts and Debenedetti model]] | ||
*[[Square shoulder + square well model]] | *[[Square shoulder + square well model]] | ||
*Henriques and Barbosa model | *Henriques and Barbosa model <ref> | ||
[http://dx.doi.org/10.1103/PhysRevE.71.031504 Vera B. Henriques and Marcia C. Barbosa, ''Liquid polymorphism and density anomaly in a lattice gas model'', Phys. Rev. E 71, 031504 (2005) [4 pages] ] | |||
</ref> | |||
==General reading== | ==General reading== | ||
Revision as of 19:02, 4 March 2009
Polyamorphic systems and liquid-liquid transitions. Some solid compounds can exist in two or more polymorphs with different atomic structures but the same chemical composition. In the case of a pure element, this behavior is termed allotropy. The existence of liquid polymorphs is known as polyamorphism, i.e. the ability of a substance to exist in several different amorphous modifications. Note: glasses are not in thermodynamic equilibrium, so such transformations do not correspond to true phase transitions from one stable liquid to another.
Polyamorphic systems
Real systems that present liquid-liquid transitions:
Models
Idealised models that present liquid-liquid transitions:
- Buldyrev and Stanley model
- Hemmer and Stell model
- Jagla ramp model
- Roberts and Debenedetti model
- Square shoulder + square well model
- Henriques and Barbosa model [1]
General reading
- C. A. Angell "Formation of Glasses from Liquids and Biopolymers", Science 267 pp. 1924 - 1935 (1995)
- Peter H. Poole, Tor Grande, C. Austen Angell, Paul F. McMillan "Polymorphic Phase Transitions in Liquids and Glasses", Science 275 pp. 322 - 323 (1997)
- Paul McMillan "Phase transitions: Jumping between liquid states", Nature 403 pp. 151-152 (2000)
- Jeff L. Yarger and George H. Wolf "Polymorphism in Liquids", Science 306 pp. 820 - 821 (2004)
- Paul F. McMillan "Polyamorphic transformations in liquids and glasses", Journal of Materials Chemistry 14 pp. 1506-1512 (2004)
- Peter H. Poole, Ivan Saika-Voivod and Francesco Sciortino "Density minimum and liquid–liquid phase transition", Journal of Physics: Condensed Matter 17 pp. L431-L437 (2005)
- Martin C. Wilding, Mark Wilson and Paul F. McMillan "Structural studies and polymorphism in amorphous solids and liquids at high pressure", Chemical Society Reviews 35 pp. 964-986 (2006)