EPR of Iron Centers in Silicon Dioxide

  title={EPR of Iron Centers in Silicon Dioxide},
  author={John A. Weil},
  • J. A. Weil
  • Published 27 December 1994
  • Chemistry
  • ChemInform
Origin and significance of the yellow cathodoluminescence (CL) of quartz
Abstract The origin of yellow cathodoluminescence (CL) in quartz has been investigated by a combination of CL microscopy and spectroscopy, electron paramagnetic resonance (EPR) spectroscopy, and
The Mössbauer spectra of prasiolite and amethyst crystals from Poland
Mössbauer spectroscopy of green (prasiolite) and violet (amethyst) quartz crystals from the Sudety Mountains (Poland) has shown that neither Fe2+ nor Fe4+ ions are present in them. Only Fe3+ ions
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Identifying the reactive sites of hydrogen peroxide decomposition and hydroxyl radical formation on chrysotile asbestos surfaces
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Quartz samples of different origin from 10 localities in the Southern Ural region, Russia have been investigated to characterize their trace element compositions and defect structures. The analytical
Brazilian Quartz Deposits with Special Emphasis on Gemstone Quartz and its Color Treatment
The exploration of Brazilian quartz deposits started in the beginning of the twentieth Century, with intensification of production during the Second World War. Four geological environments are the
A Fe K-edge XAS study of amethyst
An X-ray absorption spectroscopy (XAS) study of the Fe local environment in natural amethyst (a variety of α-quartz, SiO2) has been carried out. Room temperature measurements were performed at the Fe
One goal of this manuscript is to delineate the progress (1950-2000) of the study of the paramagnetic ’point’ defects in crystalline silicon dioxide (α-quartz), leaning more than a little on the
Cathodoluminescence Microcharacterisation of Silicon Dioxide Polymorphs
Optical cathodoluminescence (CL) microscopy and CL microanalysis are useful characterization techniques in the geosciences (Yacobi and Holt 1990; Remond et al. 1992a, 1997; Hagni 1987): Information
Defektstruktur und Farbzentren im Quarz
Quarz stellt eines der am haufigsten vorkommenden Minerale der Erde dar. Er besitzt zahlreiche Farbvarietaten die zum grosten Teil durch Defektstruk- turen und Farbzentren hervorgerufen werden. Die


EPR of iron centres in silicon dioxide
A review is presented of the present status of EPR-based understanding of Fe in SiO2. As a primary goal, a guide to the literature is given. Quantitative evaluation of all relevant spin-Hamiltonian