Silica
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Silica (Silicon dioxide) is a very interesting system, sharing many similarities with the physical properties of water.
Models
Beest, Kramer and van Santen (BKS)
Woodcock, Angell and Cheeseman (WAC)
Phase diagram
Critical point
Temperature of maximum density
Silica has a temperature of maximum density (TMD) [8] [9]
Polymorphism
Silica has a number of crystal structures. [10]
Polyamorphism
Silica has a polyamorphic (liqid-liquid) phase transition. [11] [12]. A recent study has concluded that neither the BKS nor the WAC models have a critical point [13].
References
- ↑ P. Tangney and S. Scandolo "An ab initio parametrized interatomic force field for silica", Journal of Chemical Physics 117 8898 (2002)
- ↑ Matthew H. Ford, Scott M. Auerbach and P. A. Monson "On the mechanical properties and phase behavior of silica: A simple model based on low coordination and strong association", Journal of Chemical Physics 121 8415 (2004)
- ↑ Philipp Beck, Peter Brommer, Johannes Roth, and Hans-Rainer Trebin "Ab initio based polarizable force field generation and application to liquid silica and magnesia", Journal of Chemical Physics 135 234512 (2011)
- ↑ B. W. H. van Beest, G. J. Kramer and R. A. van Santen "Force fields for silicas and aluminophosphates based on ab initio calculations", Physical Review Letters 64 pp. 1955-1958 (1990)
- ↑ L. V. Woodcock, C. A. Angell and P. Cheeseman "Molecular dynamics studies of the vitreous state: Simple ionic systems and silica", Journal of Chemical Physics 65 pp. 1565- (1976)
- ↑ Ivan Saika-Voivod, Francesco Sciortino, Tor Grande, and Peter H. Poole "Phase diagram of silica from computer simulation", Physical Review E 70 061507 (2004)
- ↑ Emanuela Bianchi, Piero Tartaglia, and Francesco Sciortino "Theoretical and numerical estimates of the gas-liquid critical point of a primitive model for silica", Journal of Chemical Physics 129 224904 (2008)
- ↑ Peter H. Poole, Mahin Hemmati, and C. Austen Angell "Comparison of Thermodynamic Properties of Simulated Liquid Silica and Water", Physical Review Letters 79 pp. 2281-2284 (1997)
- ↑ M. Scott Shell, Pablo G. Debenedetti, and Athanassios Z. Panagiotopoulos "Molecular structural order and anomalies in liquid silica", Physical Review E 66 011202 (2002)
- ↑ David M. Teter, Russell J. Hemley, Georg Kresse and Jürgen Hafner "High Pressure Polymorphism in Silica", Physical Review Letters 80 pp. 2145-2148 (1998)
- ↑ G. D. Mukherjee, S. N. Vaidya, and V. Sugandhi "Direct Observation of Amorphous to Amorphous Apparently First-Order Phase Transition in Fused Quartz", Physical Review Letters 87 195501 (2001)
- ↑ Ivan Saika-Voivod, Peter H. Poole and Francesco Sciortino "Fragile-to-strong transition and polyamorphism in the energy landscape of liquid silica", Nature 412 pp. 514-517 (2001)
- ↑ Erik Lascaris, Mahin Hemmati, Sergey V. Buldyrev, H. Eugene Stanley and C. Austen Angell "Search for a liquid-liquid critical point in models of silica", Journal of Chemical Physics 140 224502 (2014)
- Related reading
- Ivan Saika-Voivod, Francesco Sciortino, Tor Grande, Peter H. Poole "Simulated silica", Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 363 pp. 525-535 (2005)
- Chitra Rajappa, S. Bhuvaneshwari Sringeri, Yashonath Subramanian and J. Gopalakrishnan "A molecular dynamics study of ambient and high pressure phases of silica: Structure and enthalpy variation with molar volume", Journal of Chemical Physics 140 244512 (2014)