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" Ordering of water in opals with different microstructures "


Document Type : AL
Record Number : 913149
Doc. No : LA15x9k4w2
Title & Author : Ordering of water in opals with different microstructures [Article]\ Eckert, J; Gourdon, O; Jacob, DE; Meral, C; Monteiro, PJM; Vogel, SC; Wirth, R; Wenk, HR
Date : 2015
Title of Periodical : UC Berkeley
Abstract : © 2014 E. Schweizerbart'sche Verlagsbuchhandlung. Opal has long fascinated scientists. It is one of the few minerals with an amorphous structure, and yet, compared to silica glass, it is highly organized on the mesoscale. By means of inelastic neutron scattering (INS), we could document that in four samples of opal at low temperature an ice-like structure of water is present, with details depending on microstructural characteristics. While FTIR spectra for all samples are nearly identical and thus not very informative, INS shows clear differences, highlighting the significance of microstructures. Neutron diffraction at 100 K on one of the opal samples provides evidence for crystalline cubic ice.
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15x9k4w2_16180.pdf
15x9k4w2.pdf
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