Publisher Summary This chapter discusses the progress in spinel ferrite research. A large
number of oxides with a metal–oxygen ratio of 0.75 as composition is known to crystallize …

Interest in the study of solids at high pressures has increased steadily during the past
decade. In particular, the emphasis has shifted from-to a large extent-exploratory work to …

Although chemically very simple, Fe2O3 is known to undergo a series of enigmatic
structural, electronic and magnetic transformations at high pressures and high temperatures …

Hardness and elastic properties of pure (crystal) and complex (product of corrosion) iron
oxides, magnetite (Fe3O4), hematite (α-Fe2O3) and goethite (α-FeO· OH), were determined …

Fe3O4 has been studied by high-pressure diffraction to 43 GPa. No major changes in the
spinel-type structure of magnetite is observed below 21.8 GPa. At higher pressure a …

High-pressure crystal structures and compressibilities have been determined by x-ray
methods for MgAl 2 O 4 spinel and its isomorph magnetite, Fe 3 O 4. The measured bulk …

The density of the core is about 8 percent smaller than that of pure iron under similar P, T
conditions, implying the presence of a substantial amount of light element (s). Sulphur is …

Ultralow-velocity zones (ULVZs) are regions of the Earth's core–mantle boundary about 1–
10 kilometres thick exhibiting seismic velocities that are lower than radial-Earth reference …

The response of earth materials to increasing pressures and temperatures is an area of
research that is of interest to many investigators in geochemistry and geophysics. There …

The iron-oxygen system is the most important reference of rocks' redox state. Even as minor
components, iron oxides can play a critical role in redox equilibria, which affect the …