Porosity in minerals

Ekhard K.H. Salje; Ekhard K.H. Salje

doi:10.3934/matersci.2022001

AIMS Materials Science

2022, Volume 9, Issue 1: 1-8. doi: 10.3934/matersci.2022001

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Opinion paper Topical Sections

Porosity in minerals

Ekhard K.H. Salje ^,

Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, UK

Received: 15 December 2021 Accepted: 16 December 2021 Published: 24 December 2021

Minerals typically form porous assemblies with porosity extending from a few percent to ca. 35% in porous sandstones, and over 50% in tuff, clays, and tuff. While transport of gases and liquids are widely researched in these materials, much less is known about their mechanical behaviour under stress. With the development of artificial porous materials such questions become more pertinent, e.g., for applications as fillers in car bumpers and airplane wings, and nanoscale applications in memistors and neuromorphic computers. This article argues that elasticity and related dielectric and magnetic properties can be described‑to some extend-as universal in porous materials. The collapse of porous materials under stress triggers in many cases avalanches of collapsed regions which are scale invariant and follow irreversible power law energy emission. Emphasis is given to a recent simple collapse model by Casals and Salje which covers many of the observed phenomena.
- porous minerals,
- avalanches,
- porous collapse,
- mechanical stability,
- ferroelasticity
Citation: Ekhard K.H. Salje. Porosity in minerals[J]. AIMS Materials Science, 2022, 9(1): 1-8. doi: 10.3934/matersci.2022001

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Abstract

Minerals typically form porous assemblies with porosity extending from a few percent to ca. 35% in porous sandstones, and over 50% in tuff, clays, and tuff. While transport of gases and liquids are widely researched in these materials, much less is known about their mechanical behaviour under stress. With the development of artificial porous materials such questions become more pertinent, e.g., for applications as fillers in car bumpers and airplane wings, and nanoscale applications in memistors and neuromorphic computers. This article argues that elasticity and related dielectric and magnetic properties can be described‑to some extend-as universal in porous materials. The collapse of porous materials under stress triggers in many cases avalanches of collapsed regions which are scale invariant and follow irreversible power law energy emission. Emphasis is given to a recent simple collapse model by Casals and Salje which covers many of the observed phenomena.

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