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High-Pressure and Variable Temperatures Studies of Minerals: Magnetic-Electronic Properties of Selected Mineral Assemblages at High-Pressure and Variable Temperatures - Softcover
High pressure and variable temperature studies of synthetic FeS and Fe7S8 as well as natural FeTiO3 have been carried out in a diamond anvil cell. FeS in the low-pressure less than ~7 GPa has thermally activated charge carriers and a high-spin electronic configuration, whereas monoclinic-FeS above ~7 GPa adopts a magnetically quenched low-spin state and non-metallic behaviour associated with the filled valence band. By contrast Fe7S8 is magnetic and metallic below ~5 GPa and diamagnetic metallic above this pressure. The Fe3+/Fe2+ ratio in natural ilmenite samples shows rapid increase under pressure from ambient up to ~2 GPa, as deduced from 57Fe Mössbauer pressure studies. Pressure induced intervalence charge transfer away from the ferrous sites, conceivably across regions of octahedra, to the empty 3d manifold of the Ti4+ cation in an adjacent face-sharing layer along the c-axis may account for the change in the Fe3+/Fe2+ ratio. This is the first heteronuclear intervalence charge transfer observed by high-pressure Mössbauer study.
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The author was born in Ethiopia. He graduated in Physics; B.Sc. from Asmara University (1988), M.Sc. from Addis Ababa Univeristy (1994), and Ph.D. from the University of the Witwatersrand, Johannesburg (2001). He joined the department of Physics and Astronomy at Western Washington University in 2002 where he is currently an Associate Professor
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- PublisherLAP LAMBERT Academic Publishing
- Publication date2012
- ISBN 10 3659102660
- ISBN 13 9783659102660
- BindingPaperback
- Number of pages216
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High-Pressure and Variable Temperatures Studies of Minerals: Magnetic-Electronic Properties of Selected Mineral Assemblages at High-Pressure and Variable Temperatures
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ISBN 13: 9783659102660
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HighPressure and Variable Temperatures Studies of Minerals MagneticElectronic Properties of Selected Mineral Assemblages at HighPressure and Variable Temperatures
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ISBN 13: 9783659102660
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High-Pressure and Variable Temperatures Studies of Minerals
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Book Description Taschenbuch. Condition: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -High pressure and variable temperature studies of synthetic FeS and Fe7S8 as well as natural FeTiO3 have been carried out in a diamond anvil cell. FeS in the low-pressure less than ~7 GPa has thermally activated charge carriers and a high-spin electronic configuration, whereas monoclinic-FeS above ~7 GPa adopts a magnetically quenched low-spin state and non-metallic behaviour associated with the filled valence band. By contrast Fe7S8 is magnetic and metallic below ~5 GPa and diamagnetic metallic above this pressure. The Fe3+/Fe2+ ratio in natural ilmenite samples shows rapid increase under pressure from ambient up to ~2 GPa, as deduced from 57Fe Mössbauer pressure studies. Pressure induced intervalence charge transfer away from the ferrous sites, conceivably across regions of octahedra, to the empty 3d manifold of the Ti4+ cation in an adjacent face-sharing layer along the c-axis may account for the change in the Fe3+/Fe2+ ratio. This is the first heteronuclear intervalence charge transfer observed by high-pressure Mössbauer study. 216 pp. Englisch. Seller Inventory # 9783659102660
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High-Pressure and Variable Temperatures Studies of Minerals : Magnetic-Electronic Properties of Selected Mineral Assemblages at High-Pressure and Variable Temperatures
Published by
LAP Lambert Academic Publishing
(2012)
ISBN 10: 3659102660
ISBN 13: 9783659102660
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Book Description Taschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - High pressure and variable temperature studies of synthetic FeS and Fe7S8 as well as natural FeTiO3 have been carried out in a diamond anvil cell. FeS in the low-pressure less than ~7 GPa has thermally activated charge carriers and a high-spin electronic configuration, whereas monoclinic-FeS above ~7 GPa adopts a magnetically quenched low-spin state and non-metallic behaviour associated with the filled valence band. By contrast Fe7S8 is magnetic and metallic below ~5 GPa and diamagnetic metallic above this pressure. The Fe3+/Fe2+ ratio in natural ilmenite samples shows rapid increase under pressure from ambient up to ~2 GPa, as deduced from 57Fe Mössbauer pressure studies. Pressure induced intervalence charge transfer away from the ferrous sites, conceivably across regions of octahedra, to the empty 3d manifold of the Ti4+ cation in an adjacent face-sharing layer along the c-axis may account for the change in the Fe3+/Fe2+ ratio. This is the first heteronuclear intervalence charge transfer observed by high-pressure Mössbauer study. Seller Inventory # 9783659102660
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High-Pressure and Variable Temperatures Studies of Minerals
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ISBN 13: 9783659102660
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Book Description Condition: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Seda TakeleThe author was born in Ethiopia. He graduated in Physics B.Sc. from Asmara University (1988), M.Sc. from Addis Ababa Univeristy (1994), and Ph.D. from the University of the Witwatersrand, Johannesburg (2001). He joined th. Seller Inventory # 5131454
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HighPressure and Variable Temperatures Studies of Minerals MagneticElectronic Properties of Selected Mineral Assemblages at HighPressure and Variable Temperatures
Published by
LAP LAMBERT Academic Publishing
(2012)
ISBN 10: 3659102660
ISBN 13: 9783659102660
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Book Description PAP. Condition: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000. Seller Inventory # L0-9783659102660
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