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Thermodynamics of ordering and mixing in plagioclase feldspars: atomistic modelling in favour of Landau theory
Plagioclase feldspars are key components of terrestrial planets and deriving their phase diagram and activity–composition relations has been the...
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Crystal-Chemical Features of a Cation-Ordered Potassium Analog of Aqualite from the Kovdor Massif (Kola Peninsula)
AbstractThe chemical composition, crystal structure, and characteristics of the Raman spectrum of a highly hydrated aqualite-like mineral of the...
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Silicate Melts
We have already seen that, like other fused salts, silicate melts too are ionic liquids (Sect. 16.3.4...
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New insights into the crystal chemistry of zemannite: Trigonal rather than hexagonal symmetry due to ordering within the host-guest structure
The microporous crystal structure of zemannite, Mg(H 2 O) 6 [Zn 2+ Fe 3+ (TeO 3 ) 3 ] 2 · n H 2 O, n ≤ 3, was re-investigated based on single-crystal X-ray diffraction...
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The packing fraction of the oxygen sublattice: its impact on the heat of mixing
The heat of mixing of some petrological relevant substitutions (i.e., Mg-Al, Si-Al, Mg-Ti, Mg-Ca, and Mg-Fe) was investigated systematically in...
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Vibrational entropy of disordering in omphacite
The cations of an ordered omphacite from the Tauern window were gradually disordered in piston cylinder experiments at temperatures between 850 and...
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Low-temperature magnetic behavior of isocubanite from seafloor hydrothermal deposits in the Okinawa Trough
The characteristic behavior of magnetic remanence correlated with mineralogical textures and composition was observed using low-temperature...
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Experimental Study of Cation-Exchange Equilibria of Solid Solutions of Gallium Feldspars (Na,K)GaSi3O8 with Water–Salt Fluid (NaCl–KCl–H2O) at 550°С and 1.5 Kbar
AbstractData on Na and K distribution between feldspar and solution at 550°C and 1.5 kbar under hydrothermal conditions were obtained in experiments...
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Compressibilities along the magnetite–magnesioferrite solid solution
To calculate the thermodynamic properties of recently discovered high-pressure mixed valence iron oxides in the system Fe–Mg–O, information on the...
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Synchrotron high-resolution XRD and thermal expansion of synthetic Mg calcites
The structural parameters and the thermal behavior of a complete series of Ca–Mg carbonates synthesized at high pressure and temperature (1–1.5 GPa,...
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Compaction, compression, and hydraulic characteristics of micaceous residual soil
The presence of mica is considered to be why the physical and mechanical properties of micaceous soil differ significantly from those of common clay...
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The Ion Exchange Capacity of the Bazhenov Formation Shales from the Central and Southern Parts of the Nizhnevartovsk Arch of Western Siberia
AbstractThe experimental characterization of the ion-exchange capacity of low-permeability shale rocks of the Bazhenov Formation in the central and...
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Microbially-mediated formation of Ca-Fe carbonates during dissimilatory ferrihydrite reduction: Implications for the origin of sedimentary ankerite
The origin of sedimentary dolomite has become a long-standing problem in the Earth Sciences. Some carbonate minerals like ankerite have the same...
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Mineralogy, Chemistry, and Thermal and Surface Properties of Various Technological Types of K-Bentonite from the Dolná Ves Deposit (Kremnické vrchy Mts., Western Carpathians, Slovakia)
The Dolná Ves K-bentonite deposit is one of a few known economic accumulations of illite-smectite in the world. Several studies have been done on the...
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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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Isomorphism in pyroxmangite-type pyroxenoids: Mg-rich pyroxmangite from sanidinite of the Eifel paleovolcanic region, Rhineland-Palatinate, Germany
The crystal structure of Mg-rich pyroxmangite from sanidinite of the Laach Lake (Laacher See) Volcano, Eifel paleovolcanic region,...
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Cooling rates of pyroclastic deposits inferred from mineral magnetic investigations: a case study from the Pleistocene Mýtina Maar (Czech Republic)
Tephra layers of the Mýtina Maar, Czech Republic, contain ferrimagnetic Mg–Al-rich titanomagnetite, which is suggested to originate from a...
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Evolution of chemically induced cracks in alkali feldspar: thermodynamic analysis
A system of edge cracks was applied to polished (010) surfaces of K-rich gem-quality alkali feldspar by diffusion-mediated cation exchange between...
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Experiments on the Saturation of Fluorite in Magmatic Systems: Implications for Maximum F Concentration and Fluorine-Cation Bonding in Silicate Melt
The effects of melt composition, temperature and pressure on the solubility of fluorite (CaF 2 ), i.e., fluorine concentration in silicate melts in...