Structural Insights Into Sodium Rich Silicate Carbonate Glasses And Melts
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Structural Insights Into Sodium Rich Silicate Carbonate Glasses And Melts
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Author : Julia Pohlenz
language : en
Publisher:
Release Date : 2019
Structural Insights Into Sodium Rich Silicate Carbonate Glasses And Melts written by Julia Pohlenz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
Carbonate-rich silicate and carbonate melts play a crucial role in deep Earth magmatic processes and their melt structure is a key parameter, as it controls physical and chemical properties. Carbonate-rich melts can be strongly enriched in geochemically important trace elements. The structural incorporation mechanisms of these elements are difficult to study because such melts generally cannot be quenched to glasses, which are usually employed for structural investigations. This thesis investigates the influence of CO2 on the local environments of trace elements contained in silicate glasses with variable CO2 concentrations as well as in silicate and carbonate melts. The compositions studied include sodium-rich peralkaline silicate melts and glasses and carbonate melts similar to those occurring naturally at Oldoinyo Lengai volcano, Tanzania. The local environments of the three elements yttrium (Y), lanthanum (La) and strontium (Sr) were investigated in synthesized glasses and melts using X-ray absorption fine structure (XAFS) spectroscopy. Especially extended X-ray absorption fine structure spectroscopy (EXAFS) provides element specific information on local structure, such as bond lengths, coordination numbers and the degree of disorder. To cope with the enhanced structural disorder present in glasses and melts, EXAFS analysis was based on fitting approaches using an asymmetric distribution function as well as a correlation model according to bond valence theory. Firstly, silicate glasses quenched from high pressure/temperature melts with up to 7.6 wt % CO2 were investigated. In strongly and extremely peralkaline glasses the local structure of Y is unaffected by the CO2 content (with oxygen bond lengths of ~ 2.29 Å). ...
Magmas Under Pressure
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Author : Yoshio Kono
language : en
Publisher: Elsevier
Release Date : 2018-04-06
Magmas Under Pressure written by Yoshio Kono and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-06 with Science categories.
Magmas under Pressure: Advances in High-Pressure Experiments on Structure and Properties of Melts summarizes recent advances in experimental technologies for studying magmas at high pressures. In the past decade, new developments in high-pressure experiments, particularly with synchrotron X-ray techniques, have advanced the study of magmas under pressure. These new experiments have revealed significant changes of structure and physical properties of magmas under pressure, which significantly improves our understanding of the behavior of magmas in the earth’s interior. This book is an important reference, not only in the earth and planetary sciences, but also in other scientific fields, such as physics, chemistry, material sciences, engineering and in industrial applications, such as glass formation and metallurgical processing. Includes research and examples of high-pressure technologies for studying the structure and properties of magma Summarizes the current knowledge on the structure and properties of high-pressure magma Highlights the importance of magma in understanding the evolution of the earth’s interior
Geological Melts
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Author : Daniel R. Neuville
language : en
Publisher: Walter de Gruyter GmbH & Co KG
Release Date : 2022-07-04
Geological Melts written by Daniel R. Neuville and has been published by Walter de Gruyter GmbH & Co KG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-07-04 with Technology & Engineering categories.
Volume 87 of Reviews in Mineralogy and Geochemistry covers fundamental aspects of the nature of silicate melts and the implications for the systems in which they participate, both technological and natural. The contents of this volume may perhaps best be summarized as structure – properties – dynamics. The volume contains syntheses of short and medium range order, structure-property relationships, and computation-based simulations of melt structure. It continues with analyses of the properties (mechanical, diffusive, thermochemical, redox, nucleation, rheological) of melts. The dynamic behavior of melts in magmatic and volcanic systems, is then treated in the context of their behavior in magma mixing, strain localization, frictional melting, magmatic fragmentation, and hot sintering. Finally, the non-magmatic, extraterrestrial and prehistoric roles of melt and glass are presented in their respective contexts.
Silicate Melts
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Author : Sharon Webb
language : en
Publisher: Springer
Release Date : 1997-07-17
Silicate Melts written by Sharon Webb and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-07-17 with Science categories.
This book focuses on the experimental determination of the physical properties of silicate melts and magmas close to glass transition. Abundant new data are presented. The same type of measurement is performed on a range of melts to test the effect of composition on physical properties; and a range of different techniques are used to determine the same physical properties to illustrate the relationships between the relaxation of the melt structure and the relaxation of its physical properties. This book is of interest to experimental researchers in the discussion of data obtained from both a materials science and a geoscientific point of view.
Mineralogical Abstracts
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Author :
language : en
Publisher:
Release Date : 2002
Mineralogical Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Mineralogy categories.
Silicate Glasses And Melts
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Author : Bjorn O. Mysen
language : en
Publisher: Elsevier
Release Date : 2018-11-27
Silicate Glasses And Melts written by Bjorn O. Mysen and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-11-27 with Science categories.
Silicate Glasses and Melts, Second Edition describes the structure-property-composition relationships for silicate glasses and melts from a geological and industrial perspective. Updated sections include (i) characterization of silicate melt and COHN fluid structure (with and without dissolved silicate components) with pressure, temperature, and redox conditions and responses of structural variables to chemical composition, (ii) determination of solubility and solution mechanisms of COHN volatiles in silicate melts and minerals and of solubility and solution mechanisms of silicate components in COHN fluids, and (iii) effects of very high pressure on structure and properties of melts and glasses. This new book is an essential resource for researchers in a number of fields, including geology, geophysics, geoscience, volcanology, material science, glass science, petrology and mineralogy. Brings together multidisciplinary research scattered across the scientific literature into one reference, with a focus on silicate melts and their application to natural systems Emphasizes linking melt properties to melt structure Includes a discussion of the pros and cons of the use of glass as a proxy for melt structure and properties Written by highly regarded experts in the field who, among other honors, were the 2006 recipients of the prestigious G.W. Morey award of the American Ceramic Society
Deep Carbon
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Author : Beth N. Orcutt
language : en
Publisher: Cambridge University Press
Release Date : 2019-10-17
Deep Carbon written by Beth N. Orcutt and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-17 with Nature categories.
A comprehensive guide to carbon inside Earth - its quantities, movements, forms, origins, changes over time and impact on planetary processes. This title is also available as Open Access on Cambridge Core.
1992 Fall Meeting
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Author :
language : en
Publisher:
Release Date : 1992
1992 Fall Meeting written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Geodynamics categories.
Deep Carbon Science
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Author : Isabelle Daniel
language : en
Publisher: Frontiers Media SA
Release Date : 2021-01-04
Deep Carbon Science written by Isabelle Daniel and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-04 with Science categories.
Silicate Glasses And Melts
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Author : Bjorn O. Mysen
language : en
Publisher: Elsevier Science
Release Date : 2005-08-22
Silicate Glasses And Melts written by Bjorn O. Mysen and has been published by Elsevier Science this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-08-22 with Science categories.
This book describes the structure-property-composition relationships for silicate glasses and melts of industrial and geological interest. From Antiquity to the 20th century, an introductory chapter presents this subject in a historical perspective. Basic concepts are then discussed in three chapters where attention is paid to the glass transition and its various consequences on melt and glass properties, to the structural and physical differences between amorphous and crystalline silicates, and to the mutual relationships between local order, energetics and physical properties. With pure SiO2 as a starting point, compositions of increasing chemical complexity are successively dealt with in a dozen chapters. The effects of network-modifying cations on structure and properties are first exemplified by alkali and alkaline earth elements. The specific influence of aluminum, iron, titanium, and phosphorus are then reviewed. With water, volatiles in the system COHS, noble gases, and halogens, the effects of volatile components are also described. The last chapter explains how the results obtained on simpler melts can be applied to chemically complex systems. In each chapter, physical and chemical properties are described first and followed by a review of glass and melt structure. When possible, pressure effects are also considered. *From SiO2 to complex silicate compositions, the physical and chemical properties of melts and glasses of geological and industrial interest *Structural characterization of melts and glasses, from ambient to high pressure and temperature *From basic concepts to an advanced level, a consistent description of the structure-property-composition relationships in glasses and melts