Characterization of diatomaceous silica by Raman spectroscopy
Yuan, Peng, He, Hongping, Wu, D. Q., Wang, D. Q., & Chen, L. J. (2004) Characterization of diatomaceous silica by Raman spectroscopy. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 60(12), pp. 2941-2945.
The network characteristic of a selection of diatomaceous silica derived from China has been investigated using Raman spectroscopy. Before any thermal treatment of the sample, two prominent bands of 607 and circa 493 cm−1 are resolved in the Raman spectra of diatomaceous silica, corresponding to the (SiO)3-ring breathing mode of D2-line and the O3SiOH tetrahedral vibration mode of D1-line, respectively. This is more similar to the pyrogenic silica rather than the silica gel. For the latter, to obtain a (SiO)3-ring, the sample must be heated between 250 and 450 ◦C. Significant difference is also found between the diatomaceous silica and other natural silicas, e.g. in the Raman spectra of sedimentary and volcanic opals, neither D1 nor D2 band is detected in previous reports.
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|Item Type:||Journal Article|
|Keywords:||Diatomaceous silica, Raman spectroscopy, a, Cristobalite|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
|Copyright Owner:||Copyright 2004 Elsevier|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher.|
|Deposited On:||24 Jun 2005 00:00|
|Last Modified:||13 May 2016 00:41|
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