Výsledky vyhledávání - "Brown, Philip E"

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STEM investigation of exsolution lamellae and 'c' reflections in Ca-rich dolomite from the Platteville Formation, western Wisconsin

Autor: Shen, Zhizhang, Konishi, Hiromi, Brown, Philip E, Xu, Huifang

Publikováno v: American Mineralogist 98.4 (2013): 760-766

Dolomite crystals in partially dolomitized limestone from the Platteville Formation are both compositionally and microstructurally heterogeneous. A single dolomite crystal usually contains three phases: the host Ca-rich dolomite [Ca1.14Mg0.86(CO3)2],

Externí odkaz: http://arxiv.org/abs/1608.03363

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Z-contrast imaging and ab initio study on 'd' superstructure in sedimentary dolomite

Autor: Shen, Zhizhang, Konishi, Hiromi, Szlufarska, Izabela, Brown, Philip E, Xu, Huifang

Publikováno v: American Mineralogist 99.7 (2014): 1413-1419

Nano-precipitates with tripled periodicity along the c-axis are observed in a Ca-rich dolomite sample from Proterozoic carbonate rocks with "molar tooth" structure. This observation is consistent with previous description of d reflections. High-angle

Externí odkaz: http://arxiv.org/abs/1608.03361

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Investigation of the role of polysaccharide in the dolomite growth at low temperature by using atomistic simulations

Autor: Shen, Zhizhang, Brown, Philip E., Szlufarska, Izabela, Xu, Huifang

Publikováno v: Langmuir 31.38 (2015): 10435-10442

Dehydration of water from surface Mg2+ is most likely the rate-limiting step in the dolomite growth at low temperature. Here, we investigate the role of polysaccharide in this step using classical molecular dynamics (MD) calculations. Free energy (po

Externí odkaz: http://arxiv.org/abs/1608.03358

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Modeling the Effect of Dissolved Hydrogen Sulfide on Mg2+-water Complex on Dolomite {104} Surfaces

Autor: Shen, Zhizhang, Liu, Yun, Brown, Philip E., Szlufarska, Izabela, Xu, Huifang

Publikováno v: The Journal of Physical Chemistry C 118.29 (2014): 15716-15722

The key kinetic barrier to dolomite formation is related to the surface Mg2+-H2O complex, which hinders binding of surface Mg2+ ions to the CO3 2- ions in solution. It has been proposed that this reaction can be catalyzed by dissolved hydrogen sulfid

Externí odkaz: http://arxiv.org/abs/1608.03332

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