Parallel electron energy-loss spectroscopy (PEELS) study of B in minerals; the electron energy-loss near-edge structure (ELNES) of the B K edge (1995)

Other| December 01, 1995 Parallel electron energy-loss spectroscopy (PEELS) study of B in minerals: The electron energy-loss near-edge structure (ELNES) of the B K edge Laurence A. J. Garvie; Laurence A. J. Garvie University of Glasgow, Departments of Physics and Astronomy, Glasgow, United Kingdom Search for other works by this author on: GSW Google Scholar Alan J. Craven; Alan J. Craven Search for other works by this author on: GSW Google Scholar Rik Brydson Rik Brydson Search for other works by this author on: GSW Google Scholar Author and Article Information Laurence A. J. Garvie University of Glasgow, Departments of Physics and Astronomy, Glasgow, United Kingdom Alan J. Craven Rik Brydson Publisher: Mineralogical Society of America First Online: 02 Mar 2017 Online ISSN: 1945-3027 Print ISSN: 0003-004X Copyright © 1995 by the Mineralogical Society of America American Mineralogist (1995) 80 (11-12): 1132–1144. https://doi.org/10.2138/am-1995-11-1204 Article history First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Laurence A. J. Garvie, Alan J. Craven, Rik Brydson; Parallel electron energy-loss spectroscopy (PEELS) study of B in minerals: The electron energy-loss near-edge structure (ELNES) of the B K edge. American Mineralogist 1995;; 80 (11-12): 1132–1144. doi: https://doi.org/10.2138/am-1995-11-1204 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyAmerican Mineralogist Search Advanced Search Abstract The B K-edge spectra of a wide variety of minerals have been measured using the technique of parallel electron energy-loss spectroscopy (PEELS) conducted in a scanning transmission electron microscope (STEM) from sample areas of nanometer dimensions. The B K edges of the minerals exhibit electron energy-loss near-edge structure (ELNES) characteristic of B coordination. For threefold-coordinated B ([3]B), the spectra are dominated by a sharp peak at ca. 194 eV because of transitions to unoccupied states of π* character, followed by a broader peak at ca. 203 eV attributed to states of σ* character. The ELNES on the B K edge (B K ELNES) of fourfold-coordinated B ([4]B) consists of a sharp rise in intensity with a maximum at ca. 199 eV followed by several weaker structures. For [4]B, the ELNES is interpreted as transitions to states of antibonding σ* character. Minerals that possess both [3]B and [4]B exhibit an edge shape that is composed of B K edges from the respective BO3 and BO4 units, and we demonstrate the feasibility of quantification of relative site occupancies in minerals containing a mixture of B coordinations. The origins of the B K ELNES are discussed in terms of both molecular orbital (MO) and multiple scattering (MS) theory. We also present the B K-edge spectra of selected non-minerals and show how differences in edge shapes and energy onsets allow these nonminerals to be readily distinguished from borates and borosilicates. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.