Mössbauer spectra of synthetic Ca-Fe pyroxenoids and lunar pyroxferroite |
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| Authors: | Eric Dowty D. H. Lindsley |
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| Affiliation: | (1) U. S. Geological Survey, 20242 Washington, D.C.;(2) Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C.;(3) Present address: Department of Geological and Geophysical Sciences, Princeton University, 08540 Princeton, New Jersey, USA;(4) Present address: Department of Earth and Space Sciences, State University of New York, 11790 Stony Brook, New York, USA |
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| Abstract: | Resolution of the iron sites in the Mössbauer spectra of Ca-Fe pyroxenoids is only partial, two doublets being apparent in each case, whereas there are up to nine cation sites in each structure. Thus the inner and outer doublets represent, respectively: two sites and two sites in Ca0.5Fe0.5SiO3 (ferrobustamite); five sites and two sites in Ca0.15Fe0.85SiO3 (pyroxferroite); and five sites and four sites in FeSiO3 (ferrosolite III). Disorder of iron and calcium which exists in the two calcium-bearing pyroxenoids is not readily apparent in the spectra.Publication authorized by the Director, U. S. Geological Survey. |
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