Structural and thermodynamic properties of water related defects in α-quartz |
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| Authors: | A L Rosa A A El-Barbary M I Heggie P R Briddon |
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| Institution: | (1) Department of Chemistry, School of Life Sciences, University of Sussex, Falmer, Brighton, BN19QJ, UK;(2) Department of Physics, School of Natural Sciences, University of Newcastle upon Tyne, Newcastle, NE17RU, UK |
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| Abstract: | We have investigated the atomic geometries and thermodynamic properties of water related defects in α-quartz using first-principles
calculation. We confirm that the (OH)4 group is thermodynamically most stable and aggregates to form platelets in the form of microcracks with hydrolysed surfaces.
We also examine other forms of defects which can be accessible out of equilibrium at high temperature. Finally, we discuss
the consequences of our results for the hydrolytic weakening of α-quartz. |
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| Keywords: | Quartz Defects Platelets Water Hydrogarnet |
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