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Iron K-edge X-ray absorption near-edge structure spectroscopy of aerodynamically levitated silicate melts and glasses [electronic resource].

Published
Knoxville, Tenn. : University of Tennessee, Knoxville, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 169-185 : digital, PDF file
Additional Creators
Argonne National Laboratory, University of Tennessee, Knoxville, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Here, the local structure about Fe(II) and Fe(III) in silicate melts was investigated in-situ using iron K-edge X-ray absorption near-edge structure (XANES) spectroscopy. An aerodynamic levitation and laser heating system was used to allow access to high temperatures without contamination, and was combined with a chamber and gas mixing system to allow the iron oxidation state, Fe3+/ΣFe, to be varied by systematic control of the atmospheric oxygen fugacity. Eleven alkali-free, mostly iron-rich and depolymerized base compositions were chosen for the experiments, including pure oxide FeO, olivines (Fe,Mg)2SiO4, pyroxenes (Fe,Mg)SiO3, calcic FeO-CaSiO3, and a calcium aluminosilicate composition, where total iron content is denoted by FeO for convenience. Melt temperatures varied between 1410 and 2160 K and oxygen fugacities between FMQ – 2.3(3) to FMQ + 9.1(3) log units (uncertainties in parentheses) relative to the fayalite-magnetite-β-quartz (FMQ) buffer.
Report Numbers
E 1.99:1372470
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Note
Published through SciTech Connect.
01/26/2017.
"133362"
Chemical Geology 453 C ISSN 0009-2541 AM
O. L. G. Alderman; M. C. Wilding; A. Tamalonis; S. Sendelbach; S. M. Heald; C. J. Benmore; C. E. Johnson; J. A. Johnson; H. -Y. Hah; J. K. R. Weber.
Funding Information
AC02-06CH11357
View MARC record | catkey: 23782887