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Magnetic and structure transition of Mn3-xFexO4 solid solutions under high-pressure and high-temperature conditions
Magnetic and structure transitions of Mn 3–x Fe x O 4 solid solutions under extreme conditions are clarified by neutron time-of-flight scattering...
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Anisotropic electrical conductivity changes in FeTiO3 structure transition under high pressure
Electrical resistivity measurements on oriented FeTiO 3 ilmenite using single crystals at high pressures proves that FeTiO 3 ilmenite shows anisotropic...
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Crystal Chemistry and Thermodynamics of High-Pressure Phase Transition
The crystal chemical features of high-pressure phase transitions of silicates and oxides are discussed in this chapter mostly from the viewpoint of...
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Alkaline magmas in shallow arc plutonic roots: a field and experimental investigation of hydrous cumulate melting in the southern Adamello batholith
Despite the first-order importance of crystallisation–differentiation for arc magma evolution, several other processes contribute to their...
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Oriented Microinclusions of Al–Fe–Mg–Ti Oxides in Quartz from Metapelitic Granulites of the Bunger Hills, East Antarctica
AbstractThe Bunger Hills, East Antarctica occupies an area of about 300 km 2 and is underlain by large Neoarchean tonalite–granite orthogneiss bodies...
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Assemblage of Fe–Mg–Al–Ti–Zn Oxides in Granulites of the Bunger Hills, East Antarctica: Evidence of Ultrahigh-Temperature Metamorphism
AbstractThe composition and interrelations of oxides (minerals of the spinel supergroup, corundum, ilmenite, rutile) and silicates (garnet,...
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Si- versus Mg-metasomatism at the crust–mantle interface: insights from experiments, natural observations and geochemical modeling
The slab–mantle interface in subduction zones is one of the geological boundaries with the most significant chemical potential gradients, which leads...
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Experimental Modeling of Interaction between Fluorine-Containing Granite Melt and Calcite Marble
AbstractAt 750°C and a pressure of 1 kbar, an experiment was carried out simulating the contact-reaction interaction of calcite and a highly evolved...
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Mineralogy and geochemistry of multi-coloured sapphires at the Portezuelo de Pajas Blancas' deposits, northern Chile: revealing crystal growth processes
AbstractPortezuelo de Pajas Blancas' primary metasomatic deposits host sapphires that differ in size, colour, and colour distribution through...
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Optical Properties of Minerals in Plane Polarized Light (PPL)
This chapter is concerned with the optical parameters color (Sect. 4.1), habit/form (Sect. 4.2), relief (Sect. 4.3), and cleavage (Sect. 4.4). They...
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Trace element partitioning in the lunar magma ocean: an experimental study
Modeling the behavior of trace elements during lunar magma ocean solidification is important to further our understanding of the chemical evolution...
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Experimental constraints on the nature of multiphase solid inclusions and their bearing on mantle wedge metasomatism, Bohemian Massif
This study tests experimentally the hypothesis that calculated bulk compositions of multiphase solid inclusions present in minerals of ultrahigh...
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Metamorphic Grade, Conditions of Metamorphism
The intensity of metamorphism and the vigor of metamorphic transformation are expressed by the term metamorphic grade.
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A facile green synthesis of nickel ferrite nanoparticles using Tamarindus Indica seeds for magnetic and photocatalytic studies
Magnetic NiFe 2 O 4 nanoparticle (NFNPs) were synthesized by the microwave-assisted method using Tamarindus indica seeds as a green reducing agent’ for...
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Crystals
The treatment of natural crystals cannot be very comprehensive, for obvious reasons, and I limit myself to some rock-forming minerals and to some...
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Rare elements enrichment in crustal peraluminous magmas: insights from partial melting experiments
Experiments were conducted to explore the behavior of Li, Rb, Nb, Sn, Cs, Ta, W during crustal melting and test the anatectic origin of rare...
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Partitioning of Fe2O3 in peridotite partial melting experiments over a range of oxygen fugacities elucidates ferric iron systematics in mid-ocean ridge basalts and ferric iron content of the upper mantle
Basalts and peridotites from mid-ocean ridges record f O2 near the quartz-fayalite-magnetite buffer (QFM), but peridotite partial melting experiments...
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Experimental study on the effects of H2O upon crystallization in the Lower and Critical Zones of the Bushveld Complex with an emphasis on chromitite formation
Mafic–ultramafic layered rocks of the Lower and Critical Zones of the Bushveld Complex are believed to have formed from a parental magma usually...
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Single crystals of phenakite-like Be2(Si1−xGex)O4 solid solution: novel experimental data on hydrothermal crystal growth, X-ray diffraction and Raman spectroscopy study
The pioneering hydrothermal synthesis of the compound Be 2 [(Si 1− x Ge x )O 4 ] with a phenakite structure (the size of individual crystals up to 1 mm) was...
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Earth’s Heat and Temperature Field
The heat stored in the Earth provides the energy which drives the thermal convection caused by thermal buoyancy in the Earth’s liquid outer core and...