Electromagnetic effect during crystallization of melts various materials (metallic, salt, slag, oxide) is able to change significantly its macro- and microstructure improve physical technical characteristics. There are many hypotheses about the mechanism electromagnetic field on structure metals. limited studies electric, magnetic temperature fields non-metallic crystals in complex halide oxide...

Mg diffusion is important for explaining many properties of forsterite but its mechanism unknown. This makes it hard to predict how will behave in different circumstances. In this study we used Density Functional Theory (DFT) and a Kinetic Monte Carlo (KMC) method calculate the diffusivity vacancies interstitials thus rate forsterite. We vacancy be highly anisotropic with considerably faster [0...

Shock compression data are reported for hot-pressed Bamble bronzite (En86) loaded to pressures between 104 and 161 GPa. When compared to earlier shock wave data on En90 at lower pressures and to static compression data, our data require the presence of a phase change. In space the data yield two distinct trajectories, which cannot be explained by experimental error. The higher-density data, cor...

The dominant feature of the olivine Raman spectrum is a doublet that occurs in the spectral region of 815–825 cm 1 (DB1) and 838– 857 cm 1 (DB2). These features arise from coupled symmetric and asymmetric stretching vibrational modes of the constituent SiO4 tetrahedra. The frequencies of both peaks show monotonic shifts following cation substitution between forsterite and fayalite. We present a...

In this work, the potential of CO₂ mineral carbonation of brucite (Mg(OH)2) derived from the Mount Tawai peridotite (forsterite based (Mg)₂SiO4) to produce thermodynamically stable magnesium carbonate (MgCO3) was evaluated. The effect of three main factors (reaction temperature, particle size, and water vapor) were investigated in a sequence of experiments consisting of aqueous acid leaching, e...

Apollo 14 (A-14) impact melt olivine vitrophyres (OVs), composed of olivine phenocrysts in an opaque glass matrix with minor amounts of pyroxene and plagioclase, are petrographically similar to pristine quenched A-14 high-alumina (high-Al) and Apollo 12 (A-12) basalts. Textural and chemical analyses have been conducted on olivines within impact melt and pristine mare basalt clasts from A-14 bre...

Type C CAIs are a rare group of refractory inclusions in carbonaceous chondrites that compositionally and isotopically distinct from the more commonly observed igneous (i.e., As Bs). We have investigated forsterite-bearing CAI ALNH-04 Allende CV3 chondrite. This has both textural compositional similarities to some previously reported; however, there notable differences imply may formed differen...