Abstract
Halite crystal growth was conducted within a polydimethylsiloxane (PDMS) microfluidic device to understand the mineral deposition behavior in a confined environment as well as the properties and evolution of the crystallization pressure. Supersaturation was induced by cooling a NaCl solution from 35 to 25 °C, and time-lapse images of halite crystal growth in the PDMS channel were collected. Halite crystal growth caused the PDMS to deform when the crystal faces reached the PDMS channel walls. The interface between the halite crystal and the channel wall changed over time and showed non-equilibrium behavior. Deformation of the PDMS wall was evident from the photoelastic effect within the PDMS material. The crystallization pressure in the laboratory experiments was quantitatively evaluated through numerical models of microscopic PDMS deformation due to halite crystal growth. Halite indentation observed in the laboratory experiments was reproduced in the model based on the retardance observed by the photoelastic effects of the PDMS. The crystallization pressure, defined as the normal stress acting to the PDMS wall surface from the halite crystal, was inhomogeneously distributed along the interface, with a maximum value of 2.0 MPa at the crystal corner. PDMS microfluidic devices are useful for understanding the behavior of mineral precipitation in confined environments. Deformation analysis of the photoelastic stress, along with numerical modeling, may be used to examine the nature of the crystallization pressure and to shed light on the mechanism of deformation due to the crystallization pressure.
© 2015 by Walter de Gruyter Berlin/Boston
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Artikel in diesem Heft
- Needs and opportunities in mineral evolution research
- Rutile inclusions in quartz crystals record decreasing temperature and pressure during the exhumation of the Su-Lu UHP metamorphic belt in Donghai, East China
- A first-principles study of the phase transition from Holl-I to Holl-II in the composition KAlSi3O8
- Sejkoraite-(Y), a new member of the zippeite group containing trivalent cations from Jáchymov (St. Joachimsthal), Czech Republic: Description and crystal structure refinement
- Thermoelastic and thermodynamic properties of plagioclase feldspars from thermal expansion measurements
- Quantitative determination of chrysotile in massive serpentinites using DTA: Implications for asbestos determinations
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- Microstructures of the larval shell of a pearl oyster, Pinctada fucata, investigated by FIB-TEM technique
- Magnesium quantification in calcites [(Ca,Mg)CO3] by Rietveld-based XRD analysis: Revisiting a well-established method
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- Kinetics of thermal transformation of partially dehydroxylated pyrophyllite
- Dehydration of the natural zeolite goosecreekite CaAl2Si6O16·5H2O upon stepwise heating: A single-crystal and powder X-ray study
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- Thermoelastic property and high-pressure stability of Fe7C3: Implication for iron-carbide in the Earth’s core
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