A Raman spectroscopic study of humite minerals
Raman spectroscopy has been used to study the structure of the humite mineral group ((A2SiO4)n - A(OH, F)2 where n represents the number of olivine and brucite layers in the structure and is 1,2,3 or 4 and A2+ is Mg, Mn, Fe or some mix of these cations). The humite group of minerals forms a morphotropic series with the minerals olivine and brucite. The members of the humite group contain layers of the olivine structure that alternate with layers of the brucite-like sheets. The minerals are characterized by a complex set of bands in the 800 to 1000 cm-1 region attributed to the stretching vibrations of the olivine (SiO4)4- units. The number of bands in this region is influenced by the number of olivine layers. Characteristic bending modes of the (SiO4)4- units are observed in the 500 to 650 cm-1 region. The brucite sheets are characterized by the OH stretching vibrations in the 3475 to 3625 cm-1. The position of the OH stretching vibrations is determined by the strength of the hydrogen bond formed between the brucite-like OH units and the olivine silica layer. The number of olivine sheets and not the chemical composition determines the strength of the hydrogen bonds.
Impact and interest:
Citation countsare sourced monthly fromand citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.
|Item Type:||Journal Article|
|Keywords:||humite, clinohumite, olivine, brucite, silicate, Raman and IR spectroscopy|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
Past > Schools > School of Physical & Chemical Sciences
|Copyright Owner:||Copyright 2007 John Wiley & Sons|
|Copyright Statement:||The definite version is available on publication at www3.interscience.wiley.com|
|Deposited On:||14 Feb 2007|
|Last Modified:||29 Feb 2012 23:36|
Repository Staff Only: item control page