Hyperpolarized Xenon Nuclear Magnetic Resonance (NMR) of Building Stone Materials

Materials

Michele Mauri¹ 

[1] Department of Materials Science, University of Milano-Bicocca, Via R. Cozzi 53, 20125 Milano, Italy; E-Mail

关键词: ¹²⁹Xe NMR;    hyperpolarization;    continuous flow;    adsorption;    diffusion;    petrography;    rocks;    weathering;    porosity;   

DOI  :  10.3390/ma5091722

来源: mdpi

【 摘 要 】

We have investigated several building stone materials, including minerals and rocks, using continuous flow hyperpolarized xenon (CF-HP) NMR spectroscopy to probe the surface composition and porosity. Chemical shift and line width values are consistent with petrographic information. Rare upfield shifts were measured and attributed to the presence of transition metal cations on the surface. The evolution of freshly cleaved rocks exposed to the atmosphere was also characterized. The CF-HP ¹²⁹Xe NMR technique is non-destructive and it could complement currently used techniques, like porosimetry and microscopy, providing additional information on the chemical nature of the rock surface and its evolution.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.