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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing :
    Keywords: Geochemistry. ; Mineralogy. ; Geophysics. ; Geochemistry. ; Mineralogy. ; Geophysics.
    Description / Table of Contents: Introduction -- Chromium and chromium-bearing phases in the Earth -- Experimental study of Cr-bearing phases at high pressures -- Implication of experimental results to geochemistry of Cr in the Earth’s mantle.
    Abstract: This book provides an analysis of an actual problem of the evolution of deep matter under the conditions of the upper mantle, transition zone, and uppermost lower mantle. This issue has a fundamental importance in geochemistry, petrology, mineralogy, and crystalochemistry of the mantle, at different depths. The authors discuss new experimental research on the composition and conditions of the chromium-bearing minerals genesis and their associations in the Earth’s mantle. The experimental data are compared with the natural mineral assemblages, allowing a refinement of the structure and composition of the deep Geospheres of the Earth. The results of the physicochemical experiments in the "MgO–SiO2–Cr2O3" model and the multicomponent systems play a major role in understanding the phase diagrams of these systems, the structural patterns of chromium-bearing phases and the influence of Cr on P-T parameters in the Earth’s mantle.
    Type of Medium: Online Resource
    Pages: VIII, 128 p. , online resource.
    Edition: 1st ed. 2020.
    ISBN: 9783030270186
    Series Statement: Springer Geology,
    DDC: 551.9
    Language: English
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  • 2
    Keywords: Mineralogy. ; Petrology. ; Materials science. ; Mineralogy. ; Petrology. ; Materials Science.
    Description / Table of Contents: Editorial -- Discovery of fullerenes and quasicrystals in nature -- The Evolution of Mineral Evolution -- Mineral Informatics: Origins -- The Discovery of New Minerals in Modern Mineralogy: Experience, Implications and Perspectives -- Structural and chemical complexity of minerals: the information-based approach -- Predicting HP-HT Earth and planetary materials -- Structural mechanisms stabilizing hydrous silicates at deep-Earth conditions -- Discovering High-pressure and High-temperature Minerals -- Mineralogy of Planetary Cores -- Going inside a diamond -- Mineralogy of returned sample from C-type near-Earth asteroid (162173) Ryugu -- Mineral discoveries that changed everyday life -- Hydrogen, the principal agent of structural and chemical diversity in minerals.
    Abstract: This volume celebrates mineral sciences and what are considered the most important progresses and breakthroughs in this discipline. Authoritative authors, who, in most cases, are the direct discoverers recount the steps of their research, which represent landmark developments of mineralogy and mineralogical crystallography.
    Type of Medium: Online Resource
    Pages: X, 359 p. 126 illus., 98 illus. in color. , online resource.
    Edition: 1st ed. 2023.
    ISBN: 9783031288050
    Series Statement: Springer Mineralogy,
    DDC: 549
    Language: English
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  • 3
    Online Resource
    Online Resource
    Cham :Springer International Publishing :
    Keywords: Mineralogy. ; Crystallography. ; Planetary science. ; Geology. ; Materials science. ; Mineralogy. ; Crystallography and Scattering Methods. ; Planetary Science. ; Geology. ; Materials Science.
    Description / Table of Contents: Chapter 1. Introduction -- Chapter 2. What are quasicrystals and why are so important? -- Chapter 3. Can Nature have beaten us to the punch? -- Chapter 4. From crystalsto quasicrystals: There 's plenty of room between them -- Chapter 5. High pressure needed! The crystallagraphy of quasicrystals at extreme conditions -- Chapter 6. Dynamic versus static pressure: quasicrystals and shock experiments -- Chapter 7. Why quasicrystals grow in asteroidal collisions? -- Chapter 8. On the stability of quinary quasicrystals -- Chapter 9. Are quasicrystals really so rare in the Universe?.
    Abstract: This book describes the discovery of quasicrystals (icosahedral and decagonal) in an extraterrestrial rock from the Koryak Mountains of Far Eastern Russia. After a decade-long search for a natural quasicrystal, this discovery opened a new avenue in mineralogy and crystallography that could lead to further discoveries in geoscience, astronomy, condensed matter physics, and materials engineering. For the first time, minerals have been discovered that violate the symmetry restrictions of conventional crystallography. The natural occurrence of such crystals was unexpected, involving previously unknown processes. The fact that the quasicrystals were found in a meteorite formed in the earliest moments of the solar system means these processes have been active for over 4.5 billion years and have influenced the composition of the first objects to condense around the Sun. Finding quasicrystals formed in these extreme environments also informed the longstanding debate concerning the stability and robustness of quasicrystals. Recent shock experiments lend support to the hypothesis that the extraterrestrial quasicrystals formed as a result of hypervelocity impacts between objects in the early Solar system, and that they are probably less rare in the Milky Way. .
    Type of Medium: Online Resource
    Pages: X, 89 p. 61 illus., 21 illus. in color. , online resource.
    Edition: 1st ed. 2020.
    ISBN: 9783030456771
    Series Statement: SpringerBriefs in Crystallography,
    DDC: 549
    Language: English
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  • 4
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    Firenze University Press
    Publication Date: 2024-04-05
    Description: The word "gold" has influenced the imaginations of various populations over the centuries and the search for gold has been an extremely fascinating event to a multitude of societies in the past. In this publication, which is part of the "Le Perline del Museo" series of the Natural History Museum of the University of Florence, the concept of "gold" is explored from several points of view. The book is divided into 11 chapters dealing with gold from various points of view: its chemical-physical properties, how and where it can be found in nature, the mineralogy of gold, the processes to extract it, what can be done with gold and gold over the centuries, up to a brief description of the California "gold rush" of the late nineteenth century. The publication is enriched with beautiful images of gold in all its forms. For the realisation of the publication, the author collaborated with the American Museum of Natural History (New York, USA), the Museum of the City of San Francisco (San Francisco, USA) and the Metropolitan Museum of Art (New York, USA).
    Keywords: Chimica ; Storia ; Scienze naturali ; Museo di storia naturale ; Firenze ; thema EDItEUR::P Mathematics and Science::PN Chemistry::PNV Chemistry of minerals, crystals and gems ; thema EDItEUR::W Lifestyle, Hobbies and Leisure::WN Nature and the natural world: general interest::WNR Rocks, minerals and fossils: general interest
    Language: Italian
    Format: image/jpeg
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  • 5
    Publication Date: 2024-03-13
    Description: The chemistry and mineralogy of slabs subducted into lower mantle control slab rheology and impact the deep volatile cycle. It is known that the metamorphism of little-altered oceanic crust results in eclogite rocks with subequal proportions of garnet and clinopyroxene. With increasing pressure, these minerals react to stabilize pyrope-rich tetragonal majoritic garnet. However, some eclogites contain higher proportions of omphacitic clinopyroxene, caused by Na- and Si-rich metasomatism on the ocean floor or during subduction. The mineralogy of such eclogites is expected to evolve differently. Here, we discuss the results of the crystallization products of omphacitic glass at ~ 18 and ~ 25 GPa and 1000 °C to simulate P-T regimes of cold subduction. The full characterization of the recovered samples indicates evidence of crystallization of Na-, Si-rich cubic instead of tetragonal majorite. This cubic majorite can incorporate large amounts of ferric iron, promoting redox reactions with surrounding volatile-bearing fluids and, ultimately, diamond formation. In addition, the occurrence of cubic majorite in the slab would affect the local density, favoring the continued buoyancy of the slab as previously proposed by seismic observations. Attention must be paid to omphacitic inclusions in sublithospheric diamonds as these might have experienced back-transformation from the HP isochemical cubic phase.
    Description: Published
    Description: 15855
    Description: OST1 Alla ricerca dei Motori Geodinamici
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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